/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=BIGGEST --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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:02:52,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:02:52,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:02:52,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:02:52,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:02:52,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:02:52,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:02:52,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:02:52,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:02:52,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:02:52,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:02:52,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:02:52,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:02:52,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:02:52,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:02:52,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:02:52,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:02:52,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:02:52,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:02:52,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:02:52,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:02:52,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:02:52,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:02:52,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:02:52,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:02:52,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:02:52,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:02:52,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:02:52,828 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:02:52,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:02:52,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:02:52,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:02:52,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:02:52,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:02:52,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:02:52,833 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:02:52,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:02:52,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:02:52,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:02:52,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:02:52,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:02:52,837 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 [2020-10-12 16:02:52,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:02:52,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:02:52,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:02:52,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:02:52,881 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:02:52,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:02:52,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:02:52,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:02:52,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:02:52,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:02:52,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:02:52,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:02:52,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:02:52,884 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:02:52,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:02:52,885 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:02:52,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:02:52,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:02:52,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:02:52,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:02:52,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:02:52,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:02:52,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:02:52,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:02:52,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:02:52,887 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:02:52,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:02:52,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:02:52,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:02:52,887 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:02:53,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:02:53,206 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:02:53,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:02:53,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:02:53,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:02:53,216 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2020-10-12 16:02:53,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34da1d559/e1b83a99b6a645d49ace9c6502c1b157/FLAGa582ed165 [2020-10-12 16:02:53,703 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:02:53,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2020-10-12 16:02:53,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34da1d559/e1b83a99b6a645d49ace9c6502c1b157/FLAGa582ed165 [2020-10-12 16:02:54,060 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/34da1d559/e1b83a99b6a645d49ace9c6502c1b157 [2020-10-12 16:02:54,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:02:54,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:02:54,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:02:54,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:02:54,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:02:54,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbc2ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54, skipping insertion in model container [2020-10-12 16:02:54,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:02:54,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:02:54,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:02:54,279 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:02:54,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:02:54,322 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:02:54,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54 WrapperNode [2020-10-12 16:02:54,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:02:54,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:02:54,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:02:54,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:02:54,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (1/1) ... [2020-10-12 16:02:54,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:02:54,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:02:54,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:02:54,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:02:54,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (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 [2020-10-12 16:02:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:02:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:02:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:02:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:02:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:02:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:02:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 16:02:54,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 16:02:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 16:02:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:02:54,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:02:54,814 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:02:54,814 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:02:54,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:02:54 BoogieIcfgContainer [2020-10-12 16:02:54,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:02:54,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:02:54,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:02:54,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:02:54,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:02:54" (1/3) ... [2020-10-12 16:02:54,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f9ffee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:02:54, skipping insertion in model container [2020-10-12 16:02:54,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:02:54" (2/3) ... [2020-10-12 16:02:54,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f9ffee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:02:54, skipping insertion in model container [2020-10-12 16:02:54,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:02:54" (3/3) ... [2020-10-12 16:02:54,826 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2020-10-12 16:02:54,835 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:02:54,840 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:02:54,852 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:02:54,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:02:54,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:02:54,873 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:02:54,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:02:54,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:02:54,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:02:54,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:02:54,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:02:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-12 16:02:54,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:02:54,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:54,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:54,898 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:54,903 INFO L82 PathProgramCache]: Analyzing trace with hash -191727814, now seen corresponding path program 1 times [2020-10-12 16:02:54,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:54,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672337657] [2020-10-12 16:02:54,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:55,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:55,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:55,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:02:55,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-12 16:02:55,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:55,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:02:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:55,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:02:55,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:02:55,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:55,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:55,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:55,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:55,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:02:55,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:55,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:55,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:55,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672337657] [2020-10-12 16:02:55,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:02:55,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:02:55,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883961683] [2020-10-12 16:02:55,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:02:55,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:55,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:02:55,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:02:55,304 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 4 states. [2020-10-12 16:02:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:55,494 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2020-10-12 16:02:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:02:55,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-12 16:02:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:55,515 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:02:55,515 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:02:55,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:02:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:02:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-10-12 16:02:55,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:02:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-12 16:02:55,571 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2020-10-12 16:02:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:55,571 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-12 16:02:55,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:02:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-12 16:02:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:02:55,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:55,573 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] [2020-10-12 16:02:55,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:02:55,574 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1852965417, now seen corresponding path program 1 times [2020-10-12 16:02:55,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:55,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197174087] [2020-10-12 16:02:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:55,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:55,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:56,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:56,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:02:56,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:02:56,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 827 [2020-10-12 16:02:56,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:02:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:56,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:02:56,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:02:56,742 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 26 [2020-10-12 16:02:56,900 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2020-10-12 16:02:57,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:57,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:57,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:57,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:57,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:02:57,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:57,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:57,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:57,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:02:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:57,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:57,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:02:57,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:57,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 16:02:57,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:02:57,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:57,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:02:57,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:02:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:02:57,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197174087] [2020-10-12 16:02:57,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:57,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:02:57,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071619456] [2020-10-12 16:02:57,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:02:57,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:57,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:02:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:02:57,102 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-12 16:02:57,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:57,688 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-10-12 16:02:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:02:57,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-12 16:02:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:57,691 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:02:57,691 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:02:57,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:02:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:02:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-10-12 16:02:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:02:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-12 16:02:57,702 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 21 [2020-10-12 16:02:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:57,703 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-12 16:02:57,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:02:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-12 16:02:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:02:57,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:57,705 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 16:02:57,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:02:57,706 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1037887626, now seen corresponding path program 1 times [2020-10-12 16:02:57,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:57,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814474937] [2020-10-12 16:02:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:57,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:57,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:02:57,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 16:02:57,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:02:57,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:57,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:02:57,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:57,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:57,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:57,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:57,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:57,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:02:57,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:57,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:57,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:02:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:57,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:57,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:02:57,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:57,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:02:57,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:57,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:02:57,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:57,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:02:57,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:57,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 16:02:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:57,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:57,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:57,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:02:57,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:57,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:02:57,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 16:02:57,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:57,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:02:57,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814474937] [2020-10-12 16:02:57,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:02:57,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:02:57,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329651209] [2020-10-12 16:02:57,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:02:57,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:02:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:02:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:02:57,881 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2020-10-12 16:02:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:02:57,976 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2020-10-12 16:02:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:02:57,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-12 16:02:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:02:57,977 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:02:57,978 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:02:57,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:02:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:02:57,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-10-12 16:02:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:02:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 16:02:57,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 29 [2020-10-12 16:02:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:02:57,986 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 16:02:57,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:02:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 16:02:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:02:57,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:02:57,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:02:57,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:02:57,988 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:02:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:02:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1013213324, now seen corresponding path program 2 times [2020-10-12 16:02:57,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:02:57,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740325229] [2020-10-12 16:02:57,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:02:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:58,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:58,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:59,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:02:59,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:02:59,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-12 16:02:59,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:02:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:02:59,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:02:59,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:59,494 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 26 [2020-10-12 16:02:59,852 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 43 [2020-10-12 16:02:59,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:02:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:59,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:02:59,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:02:59,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:02:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:02:59,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:02:59,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:02:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:02:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:02:59,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:02:59,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:02:59,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:02:59,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 16:02:59,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:02:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:02:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:02:59,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:02:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:00,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:03:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:00,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:00,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:00,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:00,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 16:03:00,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:03:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:03:00,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:03:00,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740325229] [2020-10-12 16:03:00,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:00,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:03:00,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214198024] [2020-10-12 16:03:00,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:03:00,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:00,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:03:00,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:03:00,070 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2020-10-12 16:03:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:00,669 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-12 16:03:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:03:00,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-10-12 16:03:00,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:00,671 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:03:00,672 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:03:00,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:03:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:03:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-12 16:03:00,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:03:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 16:03:00,680 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2020-10-12 16:03:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:00,680 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 16:03:00,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:03:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 16:03:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:03:00,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:00,682 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 16:03:00,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:03:00,683 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash -415656665, now seen corresponding path program 2 times [2020-10-12 16:03:00,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:00,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161666159] [2020-10-12 16:03:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:00,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:00,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:03:01,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:01,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-12 16:03:01,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:03:01,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:01,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:03:01,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:01,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:01,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:01,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:01,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:03:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:01,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:03:01,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:01,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:03:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:01,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 16:03:01,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:03:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:01,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:03:01,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 16:03:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:01,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:01,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:01,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:01,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:01,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 16:03:01,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:01,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:01,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:01,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:01,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:03:01,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161666159] [2020-10-12 16:03:01,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:01,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:03:01,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840930731] [2020-10-12 16:03:01,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:03:01,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:01,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:03:01,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:03:01,884 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-10-12 16:03:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:02,438 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-12 16:03:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:03:02,438 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-10-12 16:03:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:02,440 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:03:02,440 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:03:02,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:03:02,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:03:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-10-12 16:03:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:03:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-12 16:03:02,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 37 [2020-10-12 16:03:02,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:02,452 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-12 16:03:02,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:03:02,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-12 16:03:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:03:02,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:02,454 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:02,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:03:02,455 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:02,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1801727962, now seen corresponding path program 3 times [2020-10-12 16:03:02,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:02,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516735879] [2020-10-12 16:03:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:03:02,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 16:03:02,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:03:02,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:02,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:03:02,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:02,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:02,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:03:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:02,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:03:02,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:02,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:03:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:02,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-12 16:03:02,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:02,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:02,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 16:03:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:02,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:02,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 16:03:02,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 16:03:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:02,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:02,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:02,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:02,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:03:02,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:02,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-12 16:03:02,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:02,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 16:03:02,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516735879] [2020-10-12 16:03:02,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:02,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:03:02,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874718087] [2020-10-12 16:03:02,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:03:02,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:03:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:03:02,732 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 6 states. [2020-10-12 16:03:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:02,844 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2020-10-12 16:03:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:03:02,844 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-12 16:03:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:02,845 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:03:02,846 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:03:02,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:03:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:03:02,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 40. [2020-10-12 16:03:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:03:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-12 16:03:02,854 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 45 [2020-10-12 16:03:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:02,855 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-12 16:03:02,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:03:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-12 16:03:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:03:02,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:02,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:02,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:03:02,857 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:02,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1562531012, now seen corresponding path program 4 times [2020-10-12 16:03:02,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:02,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411248147] [2020-10-12 16:03:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:02,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:03,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:03,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:03:05,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:03:05,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2377 [2020-10-12 16:03:05,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:03:05,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:05,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:03:05,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:03:05,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:03:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:03:05,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:05,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:03:05,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:03:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:05,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:03:05,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:05,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 16:03:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:05,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:05,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:03:05,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:05,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:05,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 16:03:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:05,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:05,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:05,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 16:03:05,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:03:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:03:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:03:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 16:03:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:05,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:05,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:05,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 16:03:05,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:03:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:05,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:03:05,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:05,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 16:03:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:05,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:05,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:05,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 16:03:05,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:03:05,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 16:03:05,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:03:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:03:05,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:03:05,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:03:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 16:03:05,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411248147] [2020-10-12 16:03:05,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:03:05,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:03:05,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256427627] [2020-10-12 16:03:05,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:03:05,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:03:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:03:05,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:03:05,952 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 15 states. [2020-10-12 16:03:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:03:06,731 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-12 16:03:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:03:06,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-10-12 16:03:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:03:06,733 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:03:06,733 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:03:06,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:03:06,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:03:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-12 16:03:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:03:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-12 16:03:06,742 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 45 [2020-10-12 16:03:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:03:06,743 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-12 16:03:06,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:03:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-12 16:03:06,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:03:06,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:03:06,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:03:06,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:03:06,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:03:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:03:06,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1981153911, now seen corresponding path program 5 times [2020-10-12 16:03:06,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:03:06,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28192429] [2020-10-12 16:03:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:03:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:03:06,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:03:08,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:03:08,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:03:08,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:03:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1262 [2020-10-12 16:03:08,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:03:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:03:08,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:03:08,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:03:08,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1