/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:16:31,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:16:31,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:16:31,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:16:31,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:16:31,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:16:31,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:16:31,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:16:31,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:16:31,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:16:31,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:16:31,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:16:31,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:16:31,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:16:31,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:16:31,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:16:31,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:16:31,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:16:31,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:16:31,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:16:31,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:16:31,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:16:31,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:16:31,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:16:31,721 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:16:31,721 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:16:31,721 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:16:31,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:16:31,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:16:31,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:16:31,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:16:31,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:16:31,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:16:31,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:16:31,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:16:31,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:16:31,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:16:31,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:16:31,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:16:31,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:16:31,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:16:31,738 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 [2020-09-25 10:16:31,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:16:31,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:16:31,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:16:31,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:16:31,788 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:16:31,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:16:31,789 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:16:31,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:16:31,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:16:31,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:16:31,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:16:31,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:16:31,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:16:31,792 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:16:31,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:16:31,792 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:16:31,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:16:31,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:16:31,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:16:31,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:16:31,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:16:31,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:16:31,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:16:31,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:16:31,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:16:31,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:16:31,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:16:31,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:16:31,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:16:31,795 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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:16:32,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:16:32,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:16:32,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:16:32,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:16:32,357 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:16:32,359 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 10:16:32,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f635e7ace/ea5e69c823cb4dae9ee6f680c082d685/FLAGfc29d3116 [2020-09-25 10:16:33,011 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:16:33,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/invert_string-1.c [2020-09-25 10:16:33,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f635e7ace/ea5e69c823cb4dae9ee6f680c082d685/FLAGfc29d3116 [2020-09-25 10:16:33,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f635e7ace/ea5e69c823cb4dae9ee6f680c082d685 [2020-09-25 10:16:33,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:16:33,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:16:33,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:16:33,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:16:33,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:16:33,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535e39d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33, skipping insertion in model container [2020-09-25 10:16:33,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:16:33,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:16:33,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:16:33,669 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:16:33,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:16:33,716 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:16:33,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33 WrapperNode [2020-09-25 10:16:33,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:16:33,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:16:33,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:16:33,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:16:33,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (1/1) ... [2020-09-25 10:16:33,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:16:33,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:16:33,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:16:33,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:16:33,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (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 [2020-09-25 10:16:33,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:16:33,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:16:33,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 10:16:33,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:16:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:16:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 10:16:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 10:16:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 10:16:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 10:16:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:16:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 10:16:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 10:16:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 10:16:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 10:16:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:16:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:16:34,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:16:34,338 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 10:16:34,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:16:34 BoogieIcfgContainer [2020-09-25 10:16:34,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:16:34,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:16:34,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:16:34,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:16:34,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:16:33" (1/3) ... [2020-09-25 10:16:34,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe9d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:16:34, skipping insertion in model container [2020-09-25 10:16:34,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:16:33" (2/3) ... [2020-09-25 10:16:34,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe9d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:16:34, skipping insertion in model container [2020-09-25 10:16:34,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:16:34" (3/3) ... [2020-09-25 10:16:34,361 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-1.c [2020-09-25 10:16:34,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:16:34,379 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:16:34,399 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:16:34,430 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:16:34,430 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:16:34,430 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:16:34,430 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:16:34,431 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:16:34,431 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:16:34,431 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:16:34,431 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:16:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-09-25 10:16:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 10:16:34,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:34,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:34,463 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:34,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1584943199, now seen corresponding path program 1 times [2020-09-25 10:16:34,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:34,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014745405] [2020-09-25 10:16:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:34,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:34,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:34,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:35,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:35,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 10:16:35,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:35,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-09-25 10:16:35,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:35,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 10:16:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:16:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:16:35,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:16:35,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:35,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:35,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:35,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:35,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:35,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 10:16:35,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:35,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:35,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:35,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:35,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014745405] [2020-09-25 10:16:35,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:16:35,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:16:35,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470342673] [2020-09-25 10:16:35,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:16:35,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:35,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:16:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:16:35,596 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-09-25 10:16:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:35,929 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2020-09-25 10:16:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 10:16:35,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-09-25 10:16:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:35,944 INFO L225 Difference]: With dead ends: 139 [2020-09-25 10:16:35,945 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 10:16:35,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 10:16:35,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 10:16:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-09-25 10:16:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 10:16:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 10:16:36,011 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 31 [2020-09-25 10:16:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:36,012 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 10:16:36,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:16:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 10:16:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 10:16:36,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:36,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:36,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:16:36,015 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:36,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash 419131922, now seen corresponding path program 1 times [2020-09-25 10:16:36,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:36,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803132864] [2020-09-25 10:16:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:36,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:36,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:36,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:36,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:37,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:37,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:37,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 10:16:37,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 10:16:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1807 [2020-09-25 10:16:37,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:37,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:37,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 10:16:37,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:16:37,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 10:16:37,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 10:16:38,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:38,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:38,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:38,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:38,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:38,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:16:38,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:38,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:38,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:38,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 10:16:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:38,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803132864] [2020-09-25 10:16:38,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:38,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 10:16:38,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817137866] [2020-09-25 10:16:38,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 10:16:38,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 10:16:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 10:16:38,432 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2020-09-25 10:16:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:39,579 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-09-25 10:16:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 10:16:39,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-09-25 10:16:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:39,582 INFO L225 Difference]: With dead ends: 113 [2020-09-25 10:16:39,582 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 10:16:39,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 10:16:39,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 10:16:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2020-09-25 10:16:39,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 10:16:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2020-09-25 10:16:39,598 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 41 [2020-09-25 10:16:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:39,598 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2020-09-25 10:16:39,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 10:16:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2020-09-25 10:16:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 10:16:39,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:39,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2020-09-25 10:16:39,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:16:39,601 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:39,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash -114770216, now seen corresponding path program 2 times [2020-09-25 10:16:39,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:39,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017698008] [2020-09-25 10:16:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:39,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:39,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:39,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:40,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:40,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:43,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:43,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 10:16:43,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:16:43,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3934 [2020-09-25 10:16:43,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:43,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:43,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-25 10:16:43,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:16:43,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:16:43,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:44,411 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2020-09-25 10:16:44,594 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2020-09-25 10:16:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:44,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:44,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:44,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:44,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:44,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:16:44,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:44,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:44,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:44,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:44,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:44,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:16:44,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017698008] [2020-09-25 10:16:44,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:44,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 10:16:44,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365818683] [2020-09-25 10:16:44,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 10:16:44,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 10:16:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-09-25 10:16:44,898 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 23 states. [2020-09-25 10:16:46,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:46,831 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-09-25 10:16:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-25 10:16:46,834 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-09-25 10:16:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:46,840 INFO L225 Difference]: With dead ends: 133 [2020-09-25 10:16:46,840 INFO L226 Difference]: Without dead ends: 131 [2020-09-25 10:16:46,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=373, Invalid=2279, Unknown=0, NotChecked=0, Total=2652 [2020-09-25 10:16:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-25 10:16:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2020-09-25 10:16:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 10:16:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-09-25 10:16:46,871 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 51 [2020-09-25 10:16:46,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:46,872 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-09-25 10:16:46,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 10:16:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-09-25 10:16:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 10:16:46,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:46,877 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-09-25 10:16:46,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:16:46,878 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:46,878 INFO L82 PathProgramCache]: Analyzing trace with hash 558450492, now seen corresponding path program 1 times [2020-09-25 10:16:46,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:46,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68297940] [2020-09-25 10:16:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:46,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:47,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:49,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:49,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 10:16:49,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 10:16:49,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2322 [2020-09-25 10:16:49,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:49,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:49,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:16:49,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 10:16:49,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 10:16:49,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:49,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:49,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:49,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:49,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:49,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:49,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:16:49,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:49,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:49,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:49,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:49,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:49,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:49,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-25 10:16:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:49,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:49,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:16:49,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:49,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 10:16:49,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:49,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:16:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:16:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:49,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68297940] [2020-09-25 10:16:49,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:16:49,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 10:16:49,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531937328] [2020-09-25 10:16:49,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 10:16:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 10:16:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 10:16:49,331 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 8 states. [2020-09-25 10:16:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:49,557 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2020-09-25 10:16:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 10:16:49,557 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-09-25 10:16:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:49,559 INFO L225 Difference]: With dead ends: 170 [2020-09-25 10:16:49,559 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 10:16:49,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:16:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 10:16:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 89. [2020-09-25 10:16:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 10:16:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-09-25 10:16:49,578 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 57 [2020-09-25 10:16:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:49,579 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-09-25 10:16:49,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 10:16:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-09-25 10:16:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-25 10:16:49,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:49,582 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-09-25 10:16:49,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:16:49,583 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash -280271430, now seen corresponding path program 1 times [2020-09-25 10:16:49,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:49,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606137838] [2020-09-25 10:16:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:49,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:49,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:51,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:51,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 10:16:51,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:16:51,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-09-25 10:16:51,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:51,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:16:51,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 10:16:51,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 10:16:51,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:51,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:51,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:51,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:51,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:51,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:51,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:16:51,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:51,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:51,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:51,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:51,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:51,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-09-25 10:16:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:51,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:51,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:51,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:16:51,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:51,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 10:16:51,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:51,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:51,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:16:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:51,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:16:51,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:51,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:51,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606137838] [2020-09-25 10:16:51,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:51,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 10:16:51,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851824795] [2020-09-25 10:16:51,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 10:16:51,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 10:16:51,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-25 10:16:51,518 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 10 states. [2020-09-25 10:16:51,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:51,804 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-09-25 10:16:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 10:16:51,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-09-25 10:16:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:51,806 INFO L225 Difference]: With dead ends: 185 [2020-09-25 10:16:51,806 INFO L226 Difference]: Without dead ends: 152 [2020-09-25 10:16:51,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:16:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-25 10:16:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2020-09-25 10:16:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-25 10:16:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2020-09-25 10:16:51,825 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 64 [2020-09-25 10:16:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:51,826 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2020-09-25 10:16:51,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 10:16:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2020-09-25 10:16:51,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 10:16:51,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:51,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-09-25 10:16:51,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:16:51,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -38012004, now seen corresponding path program 1 times [2020-09-25 10:16:51,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:51,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090545167] [2020-09-25 10:16:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:51,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:52,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:52,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:55,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:56,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:56,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:56,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-25 10:16:56,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 10:16:56,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-09-25 10:16:56,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:56,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:56,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-25 10:16:56,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:16:56,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-25 10:16:56,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:57,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:57,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:57,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:57,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:57,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 10:16:57,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:57,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:57,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:57,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:57,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:57,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-25 10:16:57,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090545167] [2020-09-25 10:16:57,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:57,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 10:16:57,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249988896] [2020-09-25 10:16:57,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 10:16:57,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 10:16:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2020-09-25 10:16:57,404 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 18 states. [2020-09-25 10:16:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:58,372 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2020-09-25 10:16:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-25 10:16:58,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-09-25 10:16:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:58,374 INFO L225 Difference]: With dead ends: 158 [2020-09-25 10:16:58,374 INFO L226 Difference]: Without dead ends: 112 [2020-09-25 10:16:58,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 10:16:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-25 10:16:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 96. [2020-09-25 10:16:58,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 10:16:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-09-25 10:16:58,392 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 68 [2020-09-25 10:16:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:58,398 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-09-25 10:16:58,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 10:16:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-09-25 10:16:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 10:16:58,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:58,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 10:16:58,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:16:58,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:58,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1059036540, now seen corresponding path program 2 times [2020-09-25 10:16:58,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:58,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150148162] [2020-09-25 10:16:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:58,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:00,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 10:17:00,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:17:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-09-25 10:17:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:00,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:17:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 10:17:00,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 10:17:00,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:00,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:00,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:00,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:00,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:17:00,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:00,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:00,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:00,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:00,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-25 10:17:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:00,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:00,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 10:17:00,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 10:17:00,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:00,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:17:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 10:17:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 10:17:00,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150148162] [2020-09-25 10:17:00,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:00,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:17:00,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203626034] [2020-09-25 10:17:00,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:17:00,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:00,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:17:00,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:17:00,201 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 9 states. [2020-09-25 10:17:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:00,504 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-09-25 10:17:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 10:17:00,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-09-25 10:17:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:00,510 INFO L225 Difference]: With dead ends: 129 [2020-09-25 10:17:00,510 INFO L226 Difference]: Without dead ends: 96 [2020-09-25 10:17:00,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:17:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-25 10:17:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-09-25 10:17:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 10:17:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-09-25 10:17:00,518 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 71 [2020-09-25 10:17:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:00,519 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-09-25 10:17:00,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:17:00,519 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-09-25 10:17:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 10:17:00,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:00,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2020-09-25 10:17:00,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:17:00,521 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1430946398, now seen corresponding path program 2 times [2020-09-25 10:17:00,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:00,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453357605] [2020-09-25 10:17:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:00,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:00,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:01,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:02,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:05,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:05,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 10:17:05,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 10:17:05,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 10:17:05,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:05,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:05,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 10:17:05,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 10:17:05,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 10:17:05,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:17:06,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:17:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:17:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:17:06,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:17:06,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:17:06,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:17:06,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:17:06,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:17:06,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:17:06,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:17:06,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:17:06,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:17:06,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:17:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 10:17:06,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453357605] [2020-09-25 10:17:06,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:17:06,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 10:17:06,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686553088] [2020-09-25 10:17:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 10:17:06,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:17:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 10:17:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-09-25 10:17:06,353 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 24 states. [2020-09-25 10:17:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:17:08,151 INFO L93 Difference]: Finished difference Result 194 states and 202 transitions. [2020-09-25 10:17:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-25 10:17:08,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 75 [2020-09-25 10:17:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:17:08,154 INFO L225 Difference]: With dead ends: 194 [2020-09-25 10:17:08,154 INFO L226 Difference]: Without dead ends: 192 [2020-09-25 10:17:08,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=405, Invalid=2787, Unknown=0, NotChecked=0, Total=3192 [2020-09-25 10:17:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-25 10:17:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2020-09-25 10:17:08,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-25 10:17:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-09-25 10:17:08,166 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 75 [2020-09-25 10:17:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:17:08,166 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-09-25 10:17:08,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-25 10:17:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-09-25 10:17:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 10:17:08,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:17:08,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-25 10:17:08,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:17:08,168 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:17:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:17:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 810536514, now seen corresponding path program 3 times [2020-09-25 10:17:08,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:17:08,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172115936] [2020-09-25 10:17:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:17:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 10:17:08,188 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 10:17:08,188 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 10:17:08,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 10:17:08,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:17:08 BoogieIcfgContainer [2020-09-25 10:17:08,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 10:17:08,219 INFO L168 Benchmark]: Toolchain (without parser) took 34850.67 ms. Allocated memory was 139.5 MB in the beginning and 435.7 MB in the end (delta: 296.2 MB). Free memory was 102.4 MB in the beginning and 383.9 MB in the end (delta: -281.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-09-25 10:17:08,220 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 10:17:08,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.42 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 10:17:08,221 INFO L168 Benchmark]: Boogie Preprocessor took 130.10 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 179.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 10:17:08,222 INFO L168 Benchmark]: RCFGBuilder took 503.96 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 161.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-09-25 10:17:08,223 INFO L168 Benchmark]: TraceAbstraction took 33863.39 ms. Allocated memory was 202.4 MB in the beginning and 435.7 MB in the end (delta: 233.3 MB). Free memory was 160.6 MB in the beginning and 383.9 MB in the end (delta: -223.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-25 10:17:08,227 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.42 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.10 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 179.6 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 503.96 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 161.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 33863.39 ms. Allocated memory was 202.4 MB in the beginning and 435.7 MB in the end (delta: 233.3 MB). Free memory was 160.6 MB in the beginning and 383.9 MB in the end (delta: -223.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L15] COND FALSE !(!(MAX > 0)) [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i