/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=SHALLOWEST --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-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:04:23,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:04:23,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:04:23,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:04:23,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:04:23,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:04:23,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:04:23,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:04:23,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:04:23,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:04:23,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:04:23,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:04:23,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:04:23,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:04:23,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:04:23,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:04:23,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:04:23,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:04:23,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:04:23,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:04:23,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:04:23,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:04:23,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:04:23,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:04:23,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:04:23,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:04:23,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:04:23,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:04:23,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:04:23,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:04:23,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:04:23,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:04:23,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:04:23,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:04:23,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:04:23,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:04:23,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:04:23,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:04:23,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:04:23,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:04:23,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:04:23,504 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 00:04:23,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:04:23,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:04:23,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:04:23,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:04:23,534 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:04:23,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:04:23,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:04:23,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:04:23,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:04:23,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:04:23,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:04:23,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:04:23,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:04:23,536 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:04:23,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:04:23,536 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:04:23,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:04:23,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:04:23,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:04:23,537 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:04:23,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:04:23,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:04:23,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:04:23,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:04:23,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:04:23,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:04:23,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:04:23,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:04:23,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:04:23,539 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:04:24,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:04:24,055 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:04:24,061 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:04:24,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:04:24,066 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:04:24,067 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-09-25 00:04:24,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4d5c134d/ae41bf82a7df4372abed4aad0327184a/FLAGe704a0f10 [2020-09-25 00:04:24,686 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:04:24,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-09-25 00:04:24,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4d5c134d/ae41bf82a7df4372abed4aad0327184a/FLAGe704a0f10 [2020-09-25 00:04:25,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c4d5c134d/ae41bf82a7df4372abed4aad0327184a [2020-09-25 00:04:25,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:04:25,059 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:04:25,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:25,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:04:25,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:04:25,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a1b984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25, skipping insertion in model container [2020-09-25 00:04:25,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:04:25,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:04:25,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:25,325 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:04:25,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:04:25,355 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:04:25,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25 WrapperNode [2020-09-25 00:04:25,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:04:25,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:04:25,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:04:25,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:04:25,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (1/1) ... [2020-09-25 00:04:25,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:04:25,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:04:25,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:04:25,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:04:25,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (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 00:04:25,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:04:25,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:04:25,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:04:25,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:04:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:04:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:04:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:04:25,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:04:25,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:04:25,729 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:04:25,729 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:04:25,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:25 BoogieIcfgContainer [2020-09-25 00:04:25,734 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:04:25,735 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:04:25,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:04:25,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:04:25,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:04:25" (1/3) ... [2020-09-25 00:04:25,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113f88e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:25, skipping insertion in model container [2020-09-25 00:04:25,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:04:25" (2/3) ... [2020-09-25 00:04:25,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113f88e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:04:25, skipping insertion in model container [2020-09-25 00:04:25,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:04:25" (3/3) ... [2020-09-25 00:04:25,744 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-09-25 00:04:25,754 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:04:25,764 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:04:25,787 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:04:25,817 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:04:25,817 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:04:25,818 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:04:25,818 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:04:25,818 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:04:25,818 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:04:25,818 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:04:25,818 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:04:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 00:04:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 00:04:25,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:25,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:25,845 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:25,853 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-25 00:04:25,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:25,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86858740] [2020-09-25 00:04:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:26,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 00:04:26,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:26,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-25 00:04:26,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:26,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:26,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 00:04:26,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:26,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:04:26,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:26,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:26,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:04:26,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:26,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:26,074 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 00:04:26,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86858740] [2020-09-25 00:04:26,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:26,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 00:04:26,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724204938] [2020-09-25 00:04:26,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 00:04:26,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:26,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 00:04:26,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 00:04:26,108 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-25 00:04:26,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:26,137 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-25 00:04:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 00:04:26,139 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 00:04:26,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:26,150 INFO L225 Difference]: With dead ends: 33 [2020-09-25 00:04:26,150 INFO L226 Difference]: Without dead ends: 16 [2020-09-25 00:04:26,155 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 [2020-09-25 00:04:26,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-25 00:04:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-25 00:04:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-25 00:04:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-25 00:04:26,200 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-25 00:04:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:26,201 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-25 00:04:26,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 00:04:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-25 00:04:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 00:04:26,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:26,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:26,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:04:26,203 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-25 00:04:26,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:26,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26880854] [2020-09-25 00:04:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:26,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:26,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 00:04:26,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:26,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 00:04:26,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:26,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:04:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 00:04:26,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:26,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:26,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:26,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:26,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:26,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:04:26,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:26,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:26,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:26,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:26,386 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 00:04:26,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26880854] [2020-09-25 00:04:26,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:04:26,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:04:26,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579673291] [2020-09-25 00:04:26,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:04:26,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:04:26,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:04:26,391 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-25 00:04:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:26,443 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-09-25 00:04:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:04:26,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-25 00:04:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:26,445 INFO L225 Difference]: With dead ends: 25 [2020-09-25 00:04:26,445 INFO L226 Difference]: Without dead ends: 20 [2020-09-25 00:04:26,446 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 [2020-09-25 00:04:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-25 00:04:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-09-25 00:04:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-25 00:04:26,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-25 00:04:26,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-25 00:04:26,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:26,453 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-25 00:04:26,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:04:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-25 00:04:26,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:04:26,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:26,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:26,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:04:26,455 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-25 00:04:26,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:26,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899847789] [2020-09-25 00:04:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:26,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 00:04:27,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:27,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-09-25 00:04:27,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:04:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:27,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:04:27,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:27,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:27,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:27,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:04:27,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:27,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899847789] [2020-09-25 00:04:27,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:27,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 00:04:27,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621902624] [2020-09-25 00:04:27,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:04:27,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:04:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:04:27,212 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-25 00:04:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:27,284 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-09-25 00:04:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:04:27,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 00:04:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:27,286 INFO L225 Difference]: With dead ends: 30 [2020-09-25 00:04:27,287 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 00:04:27,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:04:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 00:04:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-25 00:04:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 00:04:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-25 00:04:27,295 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-25 00:04:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:27,295 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-25 00:04:27,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:04:27,296 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-25 00:04:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-25 00:04:27,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:27,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:27,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:04:27,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:27,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-25 00:04:27,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:27,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356003635] [2020-09-25 00:04:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 00:04:27,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:27,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 270 [2020-09-25 00:04:27,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:04:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 00:04:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:27,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:27,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:27,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:27,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:04:27,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:27,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:27,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:27,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356003635] [2020-09-25 00:04:27,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:27,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 00:04:27,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550583399] [2020-09-25 00:04:27,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:04:27,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:27,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:04:27,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:04:27,691 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-25 00:04:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:27,803 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-25 00:04:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:04:27,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-25 00:04:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:27,805 INFO L225 Difference]: With dead ends: 35 [2020-09-25 00:04:27,805 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 00:04:27,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:04:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 00:04:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-25 00:04:27,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 00:04:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-25 00:04:27,812 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-25 00:04:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:27,813 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-25 00:04:27,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:04:27,813 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-25 00:04:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 00:04:27,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:27,814 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:27,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:04:27,815 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:27,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:27,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-25 00:04:27,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:27,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468523018] [2020-09-25 00:04:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:27,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:27,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:28,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 00:04:28,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:28,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-09-25 00:04:28,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:28,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:04:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 00:04:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:28,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:28,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:28,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:28,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:28,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:04:28,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:28,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:28,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:28,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468523018] [2020-09-25 00:04:28,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:28,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:04:28,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787069761] [2020-09-25 00:04:28,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:04:28,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:04:28,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:04:28,292 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-09-25 00:04:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:28,478 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-09-25 00:04:28,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 00:04:28,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-25 00:04:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:28,480 INFO L225 Difference]: With dead ends: 40 [2020-09-25 00:04:28,481 INFO L226 Difference]: Without dead ends: 35 [2020-09-25 00:04:28,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:04:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-25 00:04:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-25 00:04:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 00:04:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 00:04:28,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-25 00:04:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:28,489 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 00:04:28,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:04:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 00:04:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 00:04:28,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:28,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:28,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:04:28,491 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-25 00:04:28,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:28,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40656733] [2020-09-25 00:04:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:28,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:28,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:28,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:04:28,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:28,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-09-25 00:04:28,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:28,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:04:28,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:28,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 00:04:28,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:29,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:29,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:29,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:29,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:29,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:29,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:29,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:29,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:29,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:29,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40656733] [2020-09-25 00:04:29,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:29,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:04:29,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506356046] [2020-09-25 00:04:29,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:04:29,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:04:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:04:29,133 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-09-25 00:04:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:29,367 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-09-25 00:04:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 00:04:29,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-25 00:04:29,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:29,369 INFO L225 Difference]: With dead ends: 45 [2020-09-25 00:04:29,369 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 00:04:29,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:04:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 00:04:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-25 00:04:29,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 00:04:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 00:04:29,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-25 00:04:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:29,376 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 00:04:29,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:04:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 00:04:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 00:04:29,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:29,378 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:29,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:04:29,379 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:29,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-25 00:04:29,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:29,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498707661] [2020-09-25 00:04:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:29,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:30,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 00:04:30,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:30,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-09-25 00:04:30,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:04:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:30,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 00:04:30,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:30,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:30,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:30,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:30,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:30,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:30,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:30,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:30,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:30,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:30,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498707661] [2020-09-25 00:04:30,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:30,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:04:30,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474005335] [2020-09-25 00:04:30,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:04:30,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:04:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:04:30,312 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-09-25 00:04:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:30,664 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-25 00:04:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 00:04:30,667 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-25 00:04:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:30,669 INFO L225 Difference]: With dead ends: 50 [2020-09-25 00:04:30,669 INFO L226 Difference]: Without dead ends: 45 [2020-09-25 00:04:30,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:04:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-25 00:04:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-25 00:04:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 00:04:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-25 00:04:30,681 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-25 00:04:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:30,682 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-25 00:04:30,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:04:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-25 00:04:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 00:04:30,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:30,684 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:30,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:04:30,686 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-25 00:04:30,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:30,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857330214] [2020-09-25 00:04:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:30,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:31,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:31,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-25 00:04:31,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:31,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-09-25 00:04:31,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:31,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:04:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 00:04:31,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:31,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:31,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:31,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:31,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:31,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:31,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:31,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:31,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:31,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:31,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857330214] [2020-09-25 00:04:31,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:31,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 00:04:31,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397980787] [2020-09-25 00:04:31,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 00:04:31,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:31,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 00:04:31,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:04:31,844 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 15 states. [2020-09-25 00:04:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:32,236 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-09-25 00:04:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 00:04:32,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-25 00:04:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:32,238 INFO L225 Difference]: With dead ends: 55 [2020-09-25 00:04:32,238 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 00:04:32,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:04:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 00:04:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-25 00:04:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-25 00:04:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-25 00:04:32,246 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-25 00:04:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:32,246 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-25 00:04:32,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 00:04:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-25 00:04:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 00:04:32,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:32,248 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:32,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:04:32,249 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1026024175, now seen corresponding path program 7 times [2020-09-25 00:04:32,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:32,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41890958] [2020-09-25 00:04:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:32,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:32,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:33,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:33,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:04:33,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:33,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-09-25 00:04:33,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:33,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:04:33,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:33,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 00:04:33,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:33,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:33,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:33,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:33,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:33,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:33,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:33,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:33,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41890958] [2020-09-25 00:04:33,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:33,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 00:04:33,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422989003] [2020-09-25 00:04:33,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 00:04:33,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:33,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 00:04:33,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:04:33,500 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2020-09-25 00:04:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:33,990 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-09-25 00:04:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 00:04:33,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-09-25 00:04:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:33,993 INFO L225 Difference]: With dead ends: 60 [2020-09-25 00:04:33,993 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 00:04:33,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-09-25 00:04:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 00:04:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 00:04:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 00:04:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 00:04:34,000 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-25 00:04:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:34,001 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 00:04:34,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 00:04:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 00:04:34,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:04:34,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:34,002 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:34,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:04:34,003 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:34,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1033748417, now seen corresponding path program 8 times [2020-09-25 00:04:34,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:34,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557921053] [2020-09-25 00:04:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:34,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:35,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:35,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:04:35,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:35,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1167 [2020-09-25 00:04:35,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:04:35,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:35,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 00:04:35,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:35,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:35,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:35,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:35,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:35,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:35,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:35,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:35,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:35,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:35,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:35,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:35,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557921053] [2020-09-25 00:04:35,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:35,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 00:04:35,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031957373] [2020-09-25 00:04:35,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 00:04:35,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 00:04:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:04:35,575 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 19 states. [2020-09-25 00:04:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:36,197 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-09-25 00:04:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 00:04:36,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-09-25 00:04:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:36,199 INFO L225 Difference]: With dead ends: 65 [2020-09-25 00:04:36,199 INFO L226 Difference]: Without dead ends: 60 [2020-09-25 00:04:36,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 00:04:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-25 00:04:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-25 00:04:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-25 00:04:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-25 00:04:36,207 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-25 00:04:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:36,210 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-25 00:04:36,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 00:04:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-25 00:04:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 00:04:36,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:36,212 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:36,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:04:36,212 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:36,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1398950673, now seen corresponding path program 9 times [2020-09-25 00:04:36,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:36,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171019586] [2020-09-25 00:04:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:36,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:37,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:37,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 00:04:37,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:37,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1490 [2020-09-25 00:04:37,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:37,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:04:37,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:37,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-25 00:04:37,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:04:38,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:38,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:38,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:38,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:38,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:38,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 00:04:38,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:38,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:38,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:38,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171019586] [2020-09-25 00:04:38,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:38,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 00:04:38,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376672125] [2020-09-25 00:04:38,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 00:04:38,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 00:04:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:04:38,260 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2020-09-25 00:04:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:39,064 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-09-25 00:04:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 00:04:39,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-09-25 00:04:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:39,067 INFO L225 Difference]: With dead ends: 70 [2020-09-25 00:04:39,067 INFO L226 Difference]: Without dead ends: 65 [2020-09-25 00:04:39,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 00:04:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-25 00:04:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-25 00:04:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 00:04:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-25 00:04:39,087 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-25 00:04:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:39,087 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-25 00:04:39,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 00:04:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-25 00:04:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 00:04:39,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:39,091 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:39,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:04:39,091 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:39,092 INFO L82 PathProgramCache]: Analyzing trace with hash 230665791, now seen corresponding path program 10 times [2020-09-25 00:04:39,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:39,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357644412] [2020-09-25 00:04:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:40,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:40,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 00:04:40,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:40,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1538 [2020-09-25 00:04:40,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:40,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:04:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:40,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 00:04:40,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:41,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:41,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:41,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:41,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:41,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:41,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:41,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:41,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:41,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:41,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357644412] [2020-09-25 00:04:41,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:41,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 00:04:41,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030370021] [2020-09-25 00:04:41,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 00:04:41,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 00:04:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:04:41,096 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 23 states. [2020-09-25 00:04:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:42,263 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-09-25 00:04:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 00:04:42,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-09-25 00:04:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:42,264 INFO L225 Difference]: With dead ends: 75 [2020-09-25 00:04:42,265 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 00:04:42,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 00:04:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 00:04:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-25 00:04:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-25 00:04:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-25 00:04:42,272 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-25 00:04:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:42,273 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-25 00:04:42,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 00:04:42,273 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-25 00:04:42,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-25 00:04:42,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:42,274 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:42,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:04:42,274 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:42,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:42,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1468725521, now seen corresponding path program 11 times [2020-09-25 00:04:42,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:42,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120504647] [2020-09-25 00:04:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:42,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:42,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:44,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-25 00:04:44,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:44,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-09-25 00:04:44,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 00:04:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:44,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 00:04:44,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:44,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:44,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:44,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:44,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:44,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:44,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:44,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:44,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:44,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120504647] [2020-09-25 00:04:44,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:44,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 00:04:44,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497736375] [2020-09-25 00:04:44,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 00:04:44,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:44,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 00:04:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:04:44,900 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 25 states. [2020-09-25 00:04:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:46,090 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-09-25 00:04:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 00:04:46,091 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-09-25 00:04:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:46,092 INFO L225 Difference]: With dead ends: 80 [2020-09-25 00:04:46,092 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 00:04:46,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 00:04:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 00:04:46,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-25 00:04:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 00:04:46,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-25 00:04:46,101 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-25 00:04:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:46,102 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-25 00:04:46,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 00:04:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-25 00:04:46,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 00:04:46,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:46,103 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:46,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:04:46,104 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:46,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:46,104 INFO L82 PathProgramCache]: Analyzing trace with hash -844391361, now seen corresponding path program 12 times [2020-09-25 00:04:46,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:46,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672312129] [2020-09-25 00:04:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:46,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:46,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:48,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:48,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 00:04:48,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:48,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2484 [2020-09-25 00:04:48,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 00:04:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:48,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 00:04:48,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:49,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:49,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:49,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:49,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:49,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:49,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:49,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:49,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:49,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:49,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672312129] [2020-09-25 00:04:49,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:49,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 00:04:49,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176533275] [2020-09-25 00:04:49,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 00:04:49,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:49,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 00:04:49,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:04:49,178 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 27 states. [2020-09-25 00:04:50,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:50,594 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-09-25 00:04:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 00:04:50,595 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-09-25 00:04:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:50,595 INFO L225 Difference]: With dead ends: 85 [2020-09-25 00:04:50,596 INFO L226 Difference]: Without dead ends: 80 [2020-09-25 00:04:50,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 00:04:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-25 00:04:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-09-25 00:04:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 00:04:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-25 00:04:50,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-09-25 00:04:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:50,605 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-25 00:04:50,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 00:04:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-25 00:04:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-25 00:04:50,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:50,606 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:50,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 00:04:50,607 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1154341103, now seen corresponding path program 13 times [2020-09-25 00:04:50,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:50,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841362596] [2020-09-25 00:04:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:51,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:52,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:52,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-25 00:04:52,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:52,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2309 [2020-09-25 00:04:52,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:52,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 00:04:52,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:52,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-25 00:04:52,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:04:53,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:53,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:53,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:53,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:53,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:53,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:53,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:53,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:53,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:53,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841362596] [2020-09-25 00:04:53,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:53,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-25 00:04:53,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2164127] [2020-09-25 00:04:53,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-25 00:04:53,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-25 00:04:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-09-25 00:04:53,701 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 29 states. [2020-09-25 00:04:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:04:55,418 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-09-25 00:04:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 00:04:55,419 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-09-25 00:04:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:04:55,420 INFO L225 Difference]: With dead ends: 90 [2020-09-25 00:04:55,420 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 00:04:55,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2020-09-25 00:04:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 00:04:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-25 00:04:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-25 00:04:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-09-25 00:04:55,437 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-09-25 00:04:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:04:55,438 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-09-25 00:04:55,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-25 00:04:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-09-25 00:04:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 00:04:55,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:04:55,439 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:04:55,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 00:04:55,440 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:04:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:04:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2113533377, now seen corresponding path program 14 times [2020-09-25 00:04:55,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:04:55,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081756986] [2020-09-25 00:04:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:04:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:55,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:57,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:57,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 00:04:57,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:04:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2314 [2020-09-25 00:04:57,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:57,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 00:04:57,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:04:57,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-25 00:04:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:58,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:04:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:04:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:04:58,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:04:58,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:04:58,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:04:58,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:04:58,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:04:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:04:58,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:04:58,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:04:58,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:04:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:04:58,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081756986] [2020-09-25 00:04:58,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:04:58,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-25 00:04:58,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264570839] [2020-09-25 00:04:58,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-25 00:04:58,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:04:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-25 00:04:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-09-25 00:04:58,659 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 31 states. [2020-09-25 00:05:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:00,597 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-09-25 00:05:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-25 00:05:00,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-09-25 00:05:00,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:00,599 INFO L225 Difference]: With dead ends: 95 [2020-09-25 00:05:00,599 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 00:05:00,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2020-09-25 00:05:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 00:05:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-09-25 00:05:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 00:05:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-09-25 00:05:00,614 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-09-25 00:05:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:00,614 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-09-25 00:05:00,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-25 00:05:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-09-25 00:05:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-25 00:05:00,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:00,616 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:00,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 00:05:00,616 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:00,617 INFO L82 PathProgramCache]: Analyzing trace with hash -305648913, now seen corresponding path program 15 times [2020-09-25 00:05:00,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:00,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915011528] [2020-09-25 00:05:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:01,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:03,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:03,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-25 00:05:03,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:05:03,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2848 [2020-09-25 00:05:03,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:03,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 00:05:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:05:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 00:05:03,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:04,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:04,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:04,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:04,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:04,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:04,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:04,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:04,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:04,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915011528] [2020-09-25 00:05:04,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:04,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-25 00:05:04,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896753670] [2020-09-25 00:05:04,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-25 00:05:04,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-25 00:05:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 00:05:04,455 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 33 states. [2020-09-25 00:05:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:06,489 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-09-25 00:05:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-25 00:05:06,490 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 86 [2020-09-25 00:05:06,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:06,491 INFO L225 Difference]: With dead ends: 100 [2020-09-25 00:05:06,492 INFO L226 Difference]: Without dead ends: 95 [2020-09-25 00:05:06,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=228, Invalid=3678, Unknown=0, NotChecked=0, Total=3906 [2020-09-25 00:05:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-25 00:05:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-09-25 00:05:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 00:05:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-25 00:05:06,502 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-09-25 00:05:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:06,502 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-25 00:05:06,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-25 00:05:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-25 00:05:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 00:05:06,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:06,504 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:06,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 00:05:06,504 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:06,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:06,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1387198527, now seen corresponding path program 16 times [2020-09-25 00:05:06,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:06,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379492205] [2020-09-25 00:05:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:06,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:09,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:09,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 00:05:09,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:05:09,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2950 [2020-09-25 00:05:09,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 00:05:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:05:09,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 00:05:09,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:10,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:10,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:10,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:10,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:05:10,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:10,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:10,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:10,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:10,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:10,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:10,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379492205] [2020-09-25 00:05:10,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:10,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-25 00:05:10,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197853249] [2020-09-25 00:05:10,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-25 00:05:10,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-25 00:05:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 00:05:10,592 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 35 states.