/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:20:09,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:20:09,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:20:09,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:20:09,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:20:09,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:20:09,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:20:09,716 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:20:09,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:20:09,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:20:09,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:20:09,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:20:09,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:20:09,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:20:09,723 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:20:09,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:20:09,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:20:09,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:20:09,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:20:09,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:20:09,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:20:09,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:20:09,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:20:09,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:20:09,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:20:09,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:20:09,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:20:09,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:20:09,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:20:09,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:20:09,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:20:09,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:20:09,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:20:09,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:20:09,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:20:09,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:20:09,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:20:09,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:20:09,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:20:09,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:20:09,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:20:09,747 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 [2020-10-13 05:20:09,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:20:09,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:20:09,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:20:09,772 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:20:09,777 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:20:09,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:20:09,778 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:20:09,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:20:09,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:20:09,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:20:09,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:20:09,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:20:09,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:20:09,779 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:20:09,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:20:09,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:20:09,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:20:09,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:20:09,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:20:09,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:20:09,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:20:09,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:20:09,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:20:09,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:20:09,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:20:09,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:20:09,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:20:09,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:20:09,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:20:09,787 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:20:10,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:20:10,094 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:20:10,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:20:10,099 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:20:10,099 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:20:10,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_3.c [2020-10-13 05:20:10,157 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ae638afa/cd9627d1046e4a09a35eb2200303a995/FLAG337a180c9 [2020-10-13 05:20:10,616 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:20:10,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-programs/partial_mod_count_3.c [2020-10-13 05:20:10,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ae638afa/cd9627d1046e4a09a35eb2200303a995/FLAG337a180c9 [2020-10-13 05:20:10,989 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ae638afa/cd9627d1046e4a09a35eb2200303a995 [2020-10-13 05:20:10,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:20:11,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:20:11,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:11,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:20:11,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:20:11,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:10" (1/1) ... [2020-10-13 05:20:11,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edca977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11, skipping insertion in model container [2020-10-13 05:20:11,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:20:10" (1/1) ... [2020-10-13 05:20:11,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:20:11,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:20:11,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:11,208 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:20:11,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:20:11,253 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:20:11,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11 WrapperNode [2020-10-13 05:20:11,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:20:11,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:20:11,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:20:11,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:20:11,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (1/1) ... [2020-10-13 05:20:11,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:20:11,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:20:11,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:20:11,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:20:11,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (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 [2020-10-13 05:20:11,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:20:11,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:20:11,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:20:11,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:20:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:20:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:20:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:20:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:20:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:20:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:20:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:20:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:20:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:20:11,691 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:20:11,692 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:20:11,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:11 BoogieIcfgContainer [2020-10-13 05:20:11,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:20:11,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:20:11,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:20:11,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:20:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:20:10" (1/3) ... [2020-10-13 05:20:11,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f22c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:11, skipping insertion in model container [2020-10-13 05:20:11,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:20:11" (2/3) ... [2020-10-13 05:20:11,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f22c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:20:11, skipping insertion in model container [2020-10-13 05:20:11,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:20:11" (3/3) ... [2020-10-13 05:20:11,708 INFO L109 eAbstractionObserver]: Analyzing ICFG partial_mod_count_3.c [2020-10-13 05:20:11,730 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:20:11,745 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:20:11,780 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:20:11,817 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:20:11,817 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:20:11,817 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:20:11,817 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:20:11,818 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:20:11,818 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:20:11,818 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:20:11,818 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:20:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-13 05:20:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:20:11,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:11,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:11,869 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:11,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:11,877 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2020-10-13 05:20:11,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:11,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741736431] [2020-10-13 05:20:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:12,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:12,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:20:12,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:20:12,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-13 05:20:12,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:12,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:12,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:20:12,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:12,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:20:12,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:12,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:12,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:12,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:12,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:20:12,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:12,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:12,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:12,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:12,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741736431] [2020-10-13 05:20:12,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:12,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:20:12,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109151608] [2020-10-13 05:20:12,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:20:12,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:20:12,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:12,731 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-13 05:20:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:12,855 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2020-10-13 05:20:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:20:12,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 05:20:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:12,872 INFO L225 Difference]: With dead ends: 41 [2020-10-13 05:20:12,872 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 05:20:12,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:20:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 05:20:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-13 05:20:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:20:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-13 05:20:12,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-10-13 05:20:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:12,939 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-13 05:20:12,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:20:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-13 05:20:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:20:12,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:12,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:12,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:20:12,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:12,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2020-10-13 05:20:12,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:12,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851670659] [2020-10-13 05:20:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:12,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:12,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:13,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:20:13,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:20:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-13 05:20:13,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:20:13,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:13,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:13,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:13,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:13,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:13,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:13,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:13,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:13,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:13,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851670659] [2020-10-13 05:20:13,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:20:13,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:20:13,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396999200] [2020-10-13 05:20:13,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:13,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:13,404 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-13 05:20:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:13,545 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-13 05:20:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:20:13,546 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-13 05:20:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:13,549 INFO L225 Difference]: With dead ends: 46 [2020-10-13 05:20:13,549 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 05:20:13,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:20:13,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 05:20:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-10-13 05:20:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:20:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 05:20:13,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-13 05:20:13,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:13,562 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 05:20:13,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 05:20:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:20:13,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:13,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:13,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:20:13,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2000433480, now seen corresponding path program 1 times [2020-10-13 05:20:13,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:13,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349989083] [2020-10-13 05:20:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:13,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:13,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:14,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:20:14,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:20:14,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-13 05:20:14,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:14,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:20:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:20:14,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:20:14,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:20:14,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:14,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:14,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:20:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:20:14,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:20:14,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:14,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349989083] [2020-10-13 05:20:14,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:14,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:20:14,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963953421] [2020-10-13 05:20:14,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:20:14,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:20:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:20:14,622 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-13 05:20:14,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:14,831 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-10-13 05:20:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:20:14,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-13 05:20:14,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:14,833 INFO L225 Difference]: With dead ends: 45 [2020-10-13 05:20:14,834 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:20:14,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:20:14,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:20:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2020-10-13 05:20:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:20:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-13 05:20:14,842 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2020-10-13 05:20:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:14,843 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-13 05:20:14,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:20:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-13 05:20:14,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:20:14,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:14,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:14,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:20:14,845 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash 2002280522, now seen corresponding path program 1 times [2020-10-13 05:20:14,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:14,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076650709] [2020-10-13 05:20:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:14,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:14,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:15,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:15,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:15,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:20:15,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:20:15,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-13 05:20:15,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:20:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 05:20:15,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:20:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:15,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:20:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:20:15,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:20:15,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:20:15,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:20:15,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:20:15,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:20:15,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:20:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:20:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:20:15,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:20:15,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:20:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:20:15,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076650709] [2020-10-13 05:20:15,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:20:15,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:20:15,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481085545] [2020-10-13 05:20:15,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:20:15,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:20:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:20:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:20:15,165 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2020-10-13 05:20:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:20:15,313 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-10-13 05:20:15,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:20:15,313 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-13 05:20:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:20:15,315 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:20:15,315 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 05:20:15,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:20:15,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 05:20:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2020-10-13 05:20:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 05:20:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 05:20:15,323 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-10-13 05:20:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:20:15,323 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 05:20:15,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:20:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 05:20:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:20:15,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:20:15,324 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:20:15,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:20:15,325 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:20:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:20:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1749271087, now seen corresponding path program 1 times [2020-10-13 05:20:15,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:20:15,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887345303] [2020-10-13 05:20:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:20:15,335 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-13 05:20:15,336 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-13 05:20:15,336 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 05:20:15,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:20:15,362 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-13 05:20:15,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:20:15 BoogieIcfgContainer [2020-10-13 05:20:15,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 05:20:15,366 INFO L168 Benchmark]: Toolchain (without parser) took 4364.00 ms. Allocated memory was 141.6 MB in the beginning and 243.3 MB in the end (delta: 101.7 MB). Free memory was 104.5 MB in the beginning and 150.2 MB in the end (delta: -45.7 MB). Peak memory consumption was 56.0 MB. Max. memory is 7.1 GB. [2020-10-13 05:20:15,367 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-13 05:20:15,368 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.34 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 94.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-13 05:20:15,369 INFO L168 Benchmark]: Boogie Preprocessor took 149.17 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 181.5 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-13 05:20:15,370 INFO L168 Benchmark]: RCFGBuilder took 291.78 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 165.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-10-13 05:20:15,371 INFO L168 Benchmark]: TraceAbstraction took 3665.68 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 165.7 MB in the beginning and 150.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 54.8 MB. Max. memory is 7.1 GB. [2020-10-13 05:20:15,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.34 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 94.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 149.17 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 94.4 MB in the beginning and 181.5 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.78 ms. Allocated memory is still 203.9 MB. Free memory was 181.5 MB in the beginning and 165.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3665.68 ms. Allocated memory was 203.9 MB in the beginning and 243.3 MB in the end (delta: 39.3 MB). Free memory was 165.7 MB in the beginning and 150.2 MB in the end (delta: 15.5 MB). Peak memory consumption was 54.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 2]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L4] int N = 1000000; [L6] int i,j=0,a[N]; [L7] unsigned int R=3; [L8] i=0 [L8] COND TRUE iN/2) [L8] i++ [L8] COND TRUE iN/2 [L11] a[i]=i%R [L8] i++ [L8] COND FALSE !(i