/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/num_conversion_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:29:55,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:29:55,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:29:55,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:29:55,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:29:55,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:29:55,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:29:55,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:29:55,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:29:55,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:29:55,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:29:55,586 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:29:55,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:29:55,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:29:55,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:29:55,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:29:55,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:29:55,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:29:55,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:29:55,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:29:55,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:29:55,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:29:55,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:29:55,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:29:55,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:29:55,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:29:55,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:29:55,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:29:55,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:29:55,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:29:55,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:29:55,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:29:55,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:29:55,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:29:55,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:29:55,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:29:55,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:29:55,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:29:55,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:29:55,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:29:55,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:29:55,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 05:29:55,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:29:55,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:29:55,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:29:55,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:29:55,666 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:29:55,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:29:55,667 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:29:55,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:29:55,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:29:55,667 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:29:55,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:29:55,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:29:55,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:29:55,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:29:55,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:29:55,670 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:29:55,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:29:55,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:29:55,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:29:55,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:29:55,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:29:55,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:29:55,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:29:55,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:29:55,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:29:55,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:29:55,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:29:55,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:29:55,672 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:29:55,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:29:55,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:29:55,968 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:29:55,972 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:29:55,973 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:29:55,974 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:29:55,974 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/num_conversion_1.c [2020-10-13 05:29:56,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e799780/ffdd605f8cfd4d05a5874b5ee916c7d0/FLAGe26197027 [2020-10-13 05:29:56,448 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:29:56,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/num_conversion_1.c [2020-10-13 05:29:56,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e799780/ffdd605f8cfd4d05a5874b5ee916c7d0/FLAGe26197027 [2020-10-13 05:29:56,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/95e799780/ffdd605f8cfd4d05a5874b5ee916c7d0 [2020-10-13 05:29:56,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:29:56,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:29:56,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:29:56,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:29:56,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:29:56,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:29:56" (1/1) ... [2020-10-13 05:29:56,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bee85d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:56, skipping insertion in model container [2020-10-13 05:29:56,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:29:56" (1/1) ... [2020-10-13 05:29:56,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:29:56,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:29:57,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:29:57,073 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:29:57,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:29:57,105 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:29:57,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57 WrapperNode [2020-10-13 05:29:57,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:29:57,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:29:57,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:29:57,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:29:57,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... [2020-10-13 05:29:57,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:29:57,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:29:57,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:29:57,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:29:57,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:29:57,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:29:57,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:29:57,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:29:57,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:29:57,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:29:57,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:29:57,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:29:57,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:29:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:29:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:29:57,451 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:29:57,451 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 05:29:57,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:29:57 BoogieIcfgContainer [2020-10-13 05:29:57,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:29:57,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:29:57,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:29:57,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:29:57,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:29:56" (1/3) ... [2020-10-13 05:29:57,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391e47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:29:57, skipping insertion in model container [2020-10-13 05:29:57,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:29:57" (2/3) ... [2020-10-13 05:29:57,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@391e47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:29:57, skipping insertion in model container [2020-10-13 05:29:57,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:29:57" (3/3) ... [2020-10-13 05:29:57,463 INFO L109 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2020-10-13 05:29:57,474 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:29:57,481 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:29:57,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:29:57,527 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:29:57,527 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:29:57,527 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:29:57,528 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:29:57,528 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:29:57,528 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:29:57,528 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:29:57,529 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:29:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-13 05:29:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 05:29:57,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:57,559 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:57,560 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-13 05:29:57,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:57,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363548175] [2020-10-13 05:29:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:57,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:57,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:57,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 05:29:57,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-13 05:29:57,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:57,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:29:57,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:57,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:29:57,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:57,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:57,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:57,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:57,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:57,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:57,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:57,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:57,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:57,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363548175] [2020-10-13 05:29:57,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:29:57,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 05:29:57,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929967402] [2020-10-13 05:29:57,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 05:29:57,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:57,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 05:29:57,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 05:29:57,780 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-13 05:29:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:57,803 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-13 05:29:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 05:29:57,804 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 05:29:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:57,813 INFO L225 Difference]: With dead ends: 32 [2020-10-13 05:29:57,813 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 05:29:57,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 05:29:57,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 05:29:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 05:29:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 05:29:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 05:29:57,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 05:29:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:57,854 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 05:29:57,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 05:29:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 05:29:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 05:29:57,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:57,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:57,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:29:57,856 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:57,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-10-13 05:29:57,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:57,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152794099] [2020-10-13 05:29:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:57,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:57,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:57,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 05:29:57,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:57,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 05:29:57,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:29:57,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:58,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:58,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:58,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:58,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:58,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:58,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:58,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152794099] [2020-10-13 05:29:58,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:29:58,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:29:58,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505458767] [2020-10-13 05:29:58,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:29:58,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:58,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:29:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:29:58,049 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-13 05:29:58,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:58,066 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-13 05:29:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:29:58,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 05:29:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:58,068 INFO L225 Difference]: With dead ends: 21 [2020-10-13 05:29:58,068 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 05:29:58,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:29:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 05:29:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-13 05:29:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 05:29:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-13 05:29:58,075 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-13 05:29:58,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:58,075 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-13 05:29:58,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:29:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-13 05:29:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 05:29:58,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:58,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:58,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:29:58,077 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2020-10-13 05:29:58,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:58,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518251798] [2020-10-13 05:29:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 05:29:58,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 05:29:58,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:29:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:58,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:29:58,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:58,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:58,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:58,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:58,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:58,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:58,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518251798] [2020-10-13 05:29:58,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:58,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 05:29:58,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613393307] [2020-10-13 05:29:58,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:29:58,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:29:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:29:58,275 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-13 05:29:58,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:58,304 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-13 05:29:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:29:58,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-13 05:29:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:58,306 INFO L225 Difference]: With dead ends: 24 [2020-10-13 05:29:58,306 INFO L226 Difference]: Without dead ends: 19 [2020-10-13 05:29:58,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:29:58,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-13 05:29:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-13 05:29:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 05:29:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 05:29:58,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-13 05:29:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:58,313 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 05:29:58,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:29:58,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 05:29:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 05:29:58,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:58,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:58,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:29:58,314 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1182180650, now seen corresponding path program 2 times [2020-10-13 05:29:58,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:58,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544600575] [2020-10-13 05:29:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 05:29:58,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-13 05:29:58,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:29:58,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:58,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:29:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:58,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:58,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:29:58,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:58,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544600575] [2020-10-13 05:29:58,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:58,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:29:58,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791500936] [2020-10-13 05:29:58,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:29:58,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:29:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:29:58,533 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-13 05:29:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:58,563 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-10-13 05:29:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:29:58,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 05:29:58,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:58,565 INFO L225 Difference]: With dead ends: 27 [2020-10-13 05:29:58,565 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 05:29:58,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:29:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 05:29:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-13 05:29:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-13 05:29:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-13 05:29:58,572 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-13 05:29:58,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:58,572 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-13 05:29:58,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:29:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-13 05:29:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 05:29:58,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:58,574 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:58,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:29:58,574 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2055818357, now seen corresponding path program 3 times [2020-10-13 05:29:58,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:58,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813102775] [2020-10-13 05:29:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 05:29:58,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-13 05:29:58,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:29:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:58,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:29:58,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:58,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:58,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:58,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:58,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:58,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:58,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:58,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:58,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:58,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813102775] [2020-10-13 05:29:58,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:58,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:29:58,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920965982] [2020-10-13 05:29:58,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:29:58,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:29:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:29:58,784 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2020-10-13 05:29:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:58,855 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-13 05:29:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:29:58,856 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-13 05:29:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:58,857 INFO L225 Difference]: With dead ends: 30 [2020-10-13 05:29:58,857 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 05:29:58,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:29:58,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 05:29:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-13 05:29:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 05:29:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-13 05:29:58,870 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 19 [2020-10-13 05:29:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:58,870 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-13 05:29:58,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:29:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-13 05:29:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:29:58,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:58,873 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:58,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:29:58,873 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:58,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash 318767734, now seen corresponding path program 4 times [2020-10-13 05:29:58,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:58,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931791293] [2020-10-13 05:29:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:59,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:59,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:29:59,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:59,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-13 05:29:59,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:59,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:29:59,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:59,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:29:59,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:59,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:59,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:59,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:59,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:59,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:59,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:59,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:59,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:59,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:59,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931791293] [2020-10-13 05:29:59,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:59,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:29:59,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630707290] [2020-10-13 05:29:59,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:29:59,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:29:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:29:59,174 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-10-13 05:29:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:59,262 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-10-13 05:29:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:29:59,264 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-13 05:29:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:59,265 INFO L225 Difference]: With dead ends: 33 [2020-10-13 05:29:59,265 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 05:29:59,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:29:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 05:29:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-13 05:29:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:29:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 05:29:59,279 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2020-10-13 05:29:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:59,279 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 05:29:59,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:29:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 05:29:59,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 05:29:59,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:59,281 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:59,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:29:59,283 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:59,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:59,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1904607445, now seen corresponding path program 5 times [2020-10-13 05:29:59,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:59,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842609294] [2020-10-13 05:29:59,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:59,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:59,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:59,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 05:29:59,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:59,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 05:29:59,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:59,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:29:59,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:59,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:29:59,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:59,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:59,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:59,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:59,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:29:59,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:59,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:29:59,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:59,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:59,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:59,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:59,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:29:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:59,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842609294] [2020-10-13 05:29:59,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:59,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:29:59,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005477302] [2020-10-13 05:29:59,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:29:59,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:29:59,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:29:59,617 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 8 states. [2020-10-13 05:29:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:59,729 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-13 05:29:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:29:59,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 05:29:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:59,731 INFO L225 Difference]: With dead ends: 36 [2020-10-13 05:29:59,731 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:29:59,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:29:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:29:59,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-13 05:29:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:29:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-10-13 05:29:59,744 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2020-10-13 05:29:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:59,744 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-10-13 05:29:59,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:29:59,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-10-13 05:29:59,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:29:59,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:59,746 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:29:59,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:29:59,747 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:59,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:59,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1015181846, now seen corresponding path program 6 times [2020-10-13 05:29:59,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:59,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246248855] [2020-10-13 05:29:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:59,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:59,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:59,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:29:59,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:59,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-13 05:29:59,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:29:59,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:29:59,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:29:59,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:00,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:00,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:00,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:00,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:00,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:00,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:00,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:00,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:00,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:00,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:30:00,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246248855] [2020-10-13 05:30:00,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:00,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:30:00,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776894305] [2020-10-13 05:30:00,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:30:00,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:00,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:30:00,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:30:00,024 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 9 states. [2020-10-13 05:30:00,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:00,126 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-13 05:30:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:30:00,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-13 05:30:00,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:00,127 INFO L225 Difference]: With dead ends: 39 [2020-10-13 05:30:00,127 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 05:30:00,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:30:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 05:30:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 05:30:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:30:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-10-13 05:30:00,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 28 [2020-10-13 05:30:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:00,134 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-10-13 05:30:00,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:30:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-10-13 05:30:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 05:30:00,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:00,136 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:00,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:30:00,136 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:00,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:00,136 INFO L82 PathProgramCache]: Analyzing trace with hash -209588939, now seen corresponding path program 7 times [2020-10-13 05:30:00,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:00,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338219575] [2020-10-13 05:30:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:00,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:00,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 05:30:00,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:00,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-13 05:30:00,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:30:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 05:30:00,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:30:00,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:00,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:30:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:30:00,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:30:00,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:30:00,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 05:30:00,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:30:00,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:30:00,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:30:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:30:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:30:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:30:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:30:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:30:00,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338219575] [2020-10-13 05:30:00,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:30:00,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:30:00,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995306002] [2020-10-13 05:30:00,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:30:00,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:30:00,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:30:00,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:30:00,429 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-10-13 05:30:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:30:00,563 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-13 05:30:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:30:00,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-13 05:30:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:30:00,565 INFO L225 Difference]: With dead ends: 40 [2020-10-13 05:30:00,565 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:30:00,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:30:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:30:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 05:30:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:30:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-10-13 05:30:00,571 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 31 [2020-10-13 05:30:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:30:00,572 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-10-13 05:30:00,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:30:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-10-13 05:30:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 05:30:00,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:30:00,573 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:30:00,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:30:00,574 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:30:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:30:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1608865354, now seen corresponding path program 8 times [2020-10-13 05:30:00,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:30:00,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300582026] [2020-10-13 05:30:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:30:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 05:30:00,588 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 05:30:00,588 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 05:30:00,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:30:00,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 05:30:00 BoogieIcfgContainer [2020-10-13 05:30:00,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 05:30:00,611 INFO L168 Benchmark]: Toolchain (without parser) took 3727.70 ms. Allocated memory was 141.0 MB in the beginning and 243.8 MB in the end (delta: 102.8 MB). Free memory was 103.9 MB in the beginning and 200.1 MB in the end (delta: -96.2 MB). Peak memory consumption was 6.6 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:00,612 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-13 05:30:00,613 INFO L168 Benchmark]: CACSL2BoogieTranslator took 222.03 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 93.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:00,614 INFO L168 Benchmark]: Boogie Preprocessor took 109.38 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.9 MB in the beginning and 181.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:00,615 INFO L168 Benchmark]: RCFGBuilder took 239.03 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:00,616 INFO L168 Benchmark]: TraceAbstraction took 3152.44 ms. Allocated memory was 202.9 MB in the beginning and 243.8 MB in the end (delta: 40.9 MB). Free memory was 168.4 MB in the beginning and 200.1 MB in the end (delta: -31.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-13 05:30:00,619 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.2 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 222.03 ms. Allocated memory is still 141.0 MB. Free memory was 103.9 MB in the beginning and 93.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.38 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.9 MB in the beginning and 181.2 MB in the end (delta: -87.3 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.03 ms. Allocated memory is still 202.9 MB. Free memory was 181.2 MB in the beginning and 169.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3152.44 ms. Allocated memory was 202.9 MB in the beginning and 243.8 MB in the end (delta: 40.9 MB). Free memory was 168.4 MB in the beginning and 200.1 MB in the end (delta: -31.7 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 6]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 22, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L14] unsigned char x; [L15] unsigned char y; [L16] unsigned char c; [L18] x = 37 [L19] y = 0 [L20] c = 0 [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND TRUE c < (unsigned char)8 [L22] unsigned char i = ((unsigned char)1) << c; [L23] unsigned char bit = x & i; [L24] COND TRUE bit != (unsigned char)0 [L25] y = y + i [L27] c = c + ((unsigned char)1) [L21] COND FALSE !(c < (unsigned char)8) [L29] CALL __VERIFIER_assert(x == y) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 110 SDslu, 512 SDs, 0 SdLazy, 360 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 26313 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 0/196 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...