/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:19:35,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:19:35,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:19:35,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:19:35,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:19:35,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:19:35,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:19:35,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:19:35,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:19:35,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:19:35,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:19:35,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:19:35,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:19:35,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:19:35,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:19:35,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:19:35,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:19:35,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:19:35,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:19:35,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:19:35,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:19:35,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:19:35,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:19:35,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:19:35,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:19:35,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:19:35,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:19:35,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:19:35,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:19:35,962 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:19:35,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:19:35,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:19:35,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:19:35,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:19:35,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:19:35,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:19:35,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:19:35,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:19:35,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:19:35,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:19:35,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:19:35,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 02:19:36,022 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:19:36,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:19:36,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:19:36,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:19:36,023 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:19:36,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:19:36,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:19:36,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:19:36,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:19:36,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:19:36,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:19:36,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:19:36,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:19:36,029 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:19:36,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:19:36,029 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:19:36,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:19:36,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:19:36,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:19:36,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:19:36,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:19:36,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:19:36,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:19:36,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:19:36,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:19:36,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:19:36,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:19:36,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:19:36,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:19:36,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:19:36,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:19:36,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:19:36,495 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:19:36,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:19:36,498 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:19:36,500 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-25 02:19:36,599 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81e07e6f4/59d97b6599024bfd8acbcfe560adfab4/FLAGb6843706e [2020-09-25 02:19:37,167 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:19:37,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-25 02:19:37,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81e07e6f4/59d97b6599024bfd8acbcfe560adfab4/FLAGb6843706e [2020-09-25 02:19:37,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81e07e6f4/59d97b6599024bfd8acbcfe560adfab4 [2020-09-25 02:19:37,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:19:37,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:19:37,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:37,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:19:37,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:19:37,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:37" (1/1) ... [2020-09-25 02:19:37,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc40f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:37, skipping insertion in model container [2020-09-25 02:19:37,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:19:37" (1/1) ... [2020-09-25 02:19:37,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:19:37,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:19:37,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:37,867 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:19:37,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:19:38,012 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:19:38,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38 WrapperNode [2020-09-25 02:19:38,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:19:38,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:19:38,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:19:38,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:19:38,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,056 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... [2020-09-25 02:19:38,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:19:38,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:19:38,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:19:38,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:19:38,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:19:38,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:19:38,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:19:38,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 02:19:38,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:19:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:19:38,147 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 02:19:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 02:19:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:19:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 02:19:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:19:38,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:19:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:19:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:19:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:19:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:19:38,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:19:38,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:19:38,601 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 02:19:38,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:38 BoogieIcfgContainer [2020-09-25 02:19:38,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:19:38,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:19:38,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:19:38,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:19:38,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:19:37" (1/3) ... [2020-09-25 02:19:38,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790e008a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:38, skipping insertion in model container [2020-09-25 02:19:38,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:19:38" (2/3) ... [2020-09-25 02:19:38,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790e008a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:19:38, skipping insertion in model container [2020-09-25 02:19:38,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:19:38" (3/3) ... [2020-09-25 02:19:38,626 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2020-09-25 02:19:38,639 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:19:38,650 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-09-25 02:19:38,673 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-25 02:19:38,705 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:19:38,705 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:19:38,705 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:19:38,705 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:19:38,705 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:19:38,705 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:19:38,705 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:19:38,706 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:19:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states. [2020-09-25 02:19:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 02:19:38,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:38,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:38,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash 477414535, now seen corresponding path program 1 times [2020-09-25 02:19:38,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:38,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818444242] [2020-09-25 02:19:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:38,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:39,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:39,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:39,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 02:19:39,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-09-25 02:19:39,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:19:39,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-09-25 02:19:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 02:19:39,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:19:39,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:39,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:39,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:39,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:39,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:39,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 02:19:39,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:39,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:39,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:39,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:39,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818444242] [2020-09-25 02:19:39,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:39,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:19:39,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701832278] [2020-09-25 02:19:39,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:39,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:39,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:39,503 INFO L87 Difference]: Start difference. First operand 103 states. Second operand 5 states. [2020-09-25 02:19:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:39,897 INFO L93 Difference]: Finished difference Result 223 states and 250 transitions. [2020-09-25 02:19:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:19:39,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-25 02:19:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:39,914 INFO L225 Difference]: With dead ends: 223 [2020-09-25 02:19:39,914 INFO L226 Difference]: Without dead ends: 116 [2020-09-25 02:19:39,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-25 02:19:39,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2020-09-25 02:19:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-25 02:19:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-09-25 02:19:39,977 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 30 [2020-09-25 02:19:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:39,977 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-09-25 02:19:39,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-09-25 02:19:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 02:19:39,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:39,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:39,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:39,980 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:39,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:39,980 INFO L82 PathProgramCache]: Analyzing trace with hash -921386779, now seen corresponding path program 1 times [2020-09-25 02:19:39,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:39,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967252955] [2020-09-25 02:19:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:40,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:40,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:40,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-25 02:19:40,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:40,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-09-25 02:19:40,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:40,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:40,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 02:19:40,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:19:40,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:40,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:40,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:40,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:40,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:40,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:40,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 02:19:40,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:40,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:40,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:40,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:40,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967252955] [2020-09-25 02:19:40,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:40,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:19:40,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624158623] [2020-09-25 02:19:40,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:40,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:40,263 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 6 states. [2020-09-25 02:19:40,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:40,484 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2020-09-25 02:19:40,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:19:40,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-09-25 02:19:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:40,486 INFO L225 Difference]: With dead ends: 93 [2020-09-25 02:19:40,486 INFO L226 Difference]: Without dead ends: 91 [2020-09-25 02:19:40,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:19:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-25 02:19:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-09-25 02:19:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 02:19:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-09-25 02:19:40,497 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 31 [2020-09-25 02:19:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:40,498 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-09-25 02:19:40,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-09-25 02:19:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 02:19:40,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:40,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:40,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:40,500 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -223412704, now seen corresponding path program 1 times [2020-09-25 02:19:40,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:40,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148434756] [2020-09-25 02:19:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:40,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:40,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:40,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 02:19:40,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-25 02:19:40,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 02:19:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:19:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:40,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:40,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:40,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:40,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:40,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:40,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:19:40,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:40,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:40,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:40,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148434756] [2020-09-25 02:19:40,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:40,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:19:40,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290689591] [2020-09-25 02:19:40,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:19:40,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:19:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:19:40,776 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 4 states. [2020-09-25 02:19:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:40,940 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-09-25 02:19:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:19:40,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-09-25 02:19:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:40,943 INFO L225 Difference]: With dead ends: 101 [2020-09-25 02:19:40,943 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 02:19:40,944 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 [2020-09-25 02:19:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 02:19:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-09-25 02:19:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-25 02:19:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-09-25 02:19:40,953 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 33 [2020-09-25 02:19:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:40,954 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-09-25 02:19:40,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:19:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-09-25 02:19:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 02:19:40,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:40,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:40,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:40,957 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:40,958 INFO L82 PathProgramCache]: Analyzing trace with hash 276122014, now seen corresponding path program 1 times [2020-09-25 02:19:40,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:40,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097911520] [2020-09-25 02:19:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:41,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 02:19:41,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 02:19:41,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-09-25 02:19:41,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:41,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:41,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:41,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 02:19:41,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:41,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:41,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:41,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:41,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:41,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:41,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:19:41,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:41,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:41,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:41,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097911520] [2020-09-25 02:19:41,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:41,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:19:41,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604180926] [2020-09-25 02:19:41,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:41,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:41,901 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 6 states. [2020-09-25 02:19:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:42,173 INFO L93 Difference]: Finished difference Result 171 states and 179 transitions. [2020-09-25 02:19:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:19:42,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-09-25 02:19:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:42,175 INFO L225 Difference]: With dead ends: 171 [2020-09-25 02:19:42,175 INFO L226 Difference]: Without dead ends: 129 [2020-09-25 02:19:42,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-25 02:19:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-25 02:19:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 93. [2020-09-25 02:19:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 02:19:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-09-25 02:19:42,189 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 52 [2020-09-25 02:19:42,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:42,189 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-09-25 02:19:42,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-09-25 02:19:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 02:19:42,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:42,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:42,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:42,192 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:42,192 INFO L82 PathProgramCache]: Analyzing trace with hash -94524522, now seen corresponding path program 1 times [2020-09-25 02:19:42,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:42,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796095291] [2020-09-25 02:19:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:42,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:42,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 02:19:42,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:42,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-09-25 02:19:42,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:42,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:42,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-09-25 02:19:42,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:19:42,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:42,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:42,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:42,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:42,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 02:19:42,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:42,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:42,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:42,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:42,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:42,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796095291] [2020-09-25 02:19:42,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:42,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:19:42,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528714439] [2020-09-25 02:19:42,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:42,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:42,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:42,434 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 6 states. [2020-09-25 02:19:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:42,684 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2020-09-25 02:19:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:19:42,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-09-25 02:19:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:42,686 INFO L225 Difference]: With dead ends: 135 [2020-09-25 02:19:42,686 INFO L226 Difference]: Without dead ends: 133 [2020-09-25 02:19:42,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:19:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-25 02:19:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 93. [2020-09-25 02:19:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-25 02:19:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-09-25 02:19:42,696 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 53 [2020-09-25 02:19:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:42,697 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-09-25 02:19:42,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-09-25 02:19:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 02:19:42,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:42,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:42,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:19:42,699 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:42,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:42,700 INFO L82 PathProgramCache]: Analyzing trace with hash 893991191, now seen corresponding path program 1 times [2020-09-25 02:19:42,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:42,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964721694] [2020-09-25 02:19:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:42,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:42,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:42,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 02:19:42,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-09-25 02:19:42,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:19:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:42,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 02:19:42,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:43,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:43,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:43,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:43,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:43,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:43,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:19:43,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:43,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:43,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:43,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964721694] [2020-09-25 02:19:43,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:43,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 02:19:43,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600006968] [2020-09-25 02:19:43,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 02:19:43,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 02:19:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:19:43,092 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 6 states. [2020-09-25 02:19:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:43,358 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2020-09-25 02:19:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 02:19:43,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-09-25 02:19:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:43,360 INFO L225 Difference]: With dead ends: 188 [2020-09-25 02:19:43,361 INFO L226 Difference]: Without dead ends: 126 [2020-09-25 02:19:43,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-25 02:19:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 70. [2020-09-25 02:19:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 02:19:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-09-25 02:19:43,369 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 53 [2020-09-25 02:19:43,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:43,370 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-09-25 02:19:43,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 02:19:43,370 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-09-25 02:19:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 02:19:43,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:43,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:43,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:19:43,372 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2013372873, now seen corresponding path program 1 times [2020-09-25 02:19:43,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:43,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985444507] [2020-09-25 02:19:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:43,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:44,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:45,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:45,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 02:19:45,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:45,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-09-25 02:19:45,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:19:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 02:19:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 02:19:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:45,664 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 49 [2020-09-25 02:19:45,939 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 62 [2020-09-25 02:19:46,433 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 69 [2020-09-25 02:19:46,642 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 60 [2020-09-25 02:19:46,883 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2020-09-25 02:19:47,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:47,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:47,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:47,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:19:47,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:47,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 02:19:47,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:47,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:47,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:47,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985444507] [2020-09-25 02:19:47,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:47,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-25 02:19:47,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067959058] [2020-09-25 02:19:47,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 02:19:47,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 02:19:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:19:47,198 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 14 states. [2020-09-25 02:19:47,547 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-09-25 02:19:47,692 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-09-25 02:19:48,070 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-09-25 02:19:52,364 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 91 [2020-09-25 02:19:54,635 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification that was a NOOP. DAG size: 93 [2020-09-25 02:19:54,950 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-09-25 02:19:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:55,130 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-09-25 02:19:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 02:19:55,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-09-25 02:19:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:55,131 INFO L225 Difference]: With dead ends: 94 [2020-09-25 02:19:55,132 INFO L226 Difference]: Without dead ends: 92 [2020-09-25 02:19:55,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-09-25 02:19:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-25 02:19:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2020-09-25 02:19:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-25 02:19:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-09-25 02:19:55,142 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 55 [2020-09-25 02:19:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:55,142 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-09-25 02:19:55,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 02:19:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-09-25 02:19:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 02:19:55,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:55,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:55,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:19:55,145 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:55,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash 511170824, now seen corresponding path program 1 times [2020-09-25 02:19:55,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:55,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079682246] [2020-09-25 02:19:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:55,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:56,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:00,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:00,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 02:20:00,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:20:00,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-09-25 02:20:00,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 02:20:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-09-25 02:20:00,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 02:20:00,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:20:01,639 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-09-25 02:20:10,521 WARN L193 SmtUtils]: Spent 8.85 s on a formula simplification. DAG size of input: 120 DAG size of output: 104 [2020-09-25 02:20:11,001 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 67 [2020-09-25 02:20:11,522 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 74 [2020-09-25 02:20:18,136 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-09-25 02:20:18,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:20:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:20:18,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:20:18,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:20:18,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 02:20:18,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:20:18,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:20:18,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:20:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:20:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:20:18,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:20:18,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:20:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:20:18,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079682246] [2020-09-25 02:20:18,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:20:18,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:20:18,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030618061] [2020-09-25 02:20:18,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:20:18,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:20:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:20:18,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:20:18,505 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 12 states. [2020-09-25 02:20:23,373 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification that was a NOOP. DAG size: 116 [2020-09-25 02:20:23,745 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-09-25 02:20:39,338 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-09-25 02:20:41,737 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-25 02:20:42,012 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 70