/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-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:06:04,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:06:04,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:06:04,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:06:04,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:06:04,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:06:04,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:06:04,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:06:04,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:06:04,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:06:04,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:06:04,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:06:04,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:06:04,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:06:04,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:06:04,767 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:06:04,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:06:04,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:06:04,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:06:04,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:06:04,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:06:04,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:06:04,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:06:04,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:06:04,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:06:04,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:06:04,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:06:04,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:06:04,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:06:04,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:06:04,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:06:04,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:06:04,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:06:04,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:06:04,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:06:04,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:06:04,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:06:04,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:06:04,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:06:04,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:06:04,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:06:04,808 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 00:06:04,859 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:06:04,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:06:04,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:06:04,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:06:04,862 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:06:04,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:06:04,863 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:06:04,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:06:04,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:06:04,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:06:04,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:06:04,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:06:04,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:06:04,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:06:04,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:06:04,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:06:04,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:06:04,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:06:04,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:06:04,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:06:04,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:06:04,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:06:04,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:06:04,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:06:04,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:06:04,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:06:04,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:06:04,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:06:04,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:06:04,869 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 00:06:05,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:06:05,366 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:06:05,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:06:05,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:06:05,375 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:06:05,376 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-09-25 00:06:05,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e425cb60a/580af8b654de45cc8b311fbcf995573f/FLAGb19df45bc [2020-09-25 00:06:06,012 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:06:06,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1.i [2020-09-25 00:06:06,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e425cb60a/580af8b654de45cc8b311fbcf995573f/FLAGb19df45bc [2020-09-25 00:06:06,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e425cb60a/580af8b654de45cc8b311fbcf995573f [2020-09-25 00:06:06,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:06:06,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:06:06,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:06:06,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:06:06,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:06:06,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0b0d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06, skipping insertion in model container [2020-09-25 00:06:06,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:06:06,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:06:06,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:06:06,734 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:06:06,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:06:06,772 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:06:06,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06 WrapperNode [2020-09-25 00:06:06,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:06:06,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:06:06,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:06:06,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:06:06,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (1/1) ... [2020-09-25 00:06:06,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:06:06,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:06:06,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:06:06,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:06:06,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (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 00:06:06,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:06:06,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:06:06,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:06:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:06:06,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:06:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:06:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:06:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:06:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:06:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:06:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:06:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:06:06,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:06:07,172 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:06:07,173 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 00:06:07,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:06:07 BoogieIcfgContainer [2020-09-25 00:06:07,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:06:07,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:06:07,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:06:07,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:06:07,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:06:06" (1/3) ... [2020-09-25 00:06:07,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9796e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:06:07, skipping insertion in model container [2020-09-25 00:06:07,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:06:06" (2/3) ... [2020-09-25 00:06:07,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9796e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:06:07, skipping insertion in model container [2020-09-25 00:06:07,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:06:07" (3/3) ... [2020-09-25 00:06:07,187 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-09-25 00:06:07,199 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:06:07,209 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:06:07,231 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:06:07,264 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:06:07,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:06:07,264 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:06:07,264 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:06:07,265 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:06:07,265 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:06:07,265 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:06:07,265 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:06:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-25 00:06:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 00:06:07,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:07,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:07,292 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:07,299 INFO L82 PathProgramCache]: Analyzing trace with hash 574813456, now seen corresponding path program 1 times [2020-09-25 00:06:07,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:07,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335426793] [2020-09-25 00:06:07,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:07,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 00:06:07,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:07,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-09-25 00:06:07,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:06:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 00:06:07,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:06:07,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:07,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:07,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:07,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:07,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:06:07,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:07,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:07,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:07,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:07,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:07,547 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 00:06:07,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335426793] [2020-09-25 00:06:07,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:06:07,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 00:06:07,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944316170] [2020-09-25 00:06:07,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 00:06:07,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:07,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 00:06:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 00:06:07,580 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-09-25 00:06:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:07,638 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-09-25 00:06:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 00:06:07,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-25 00:06:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:07,652 INFO L225 Difference]: With dead ends: 37 [2020-09-25 00:06:07,653 INFO L226 Difference]: Without dead ends: 18 [2020-09-25 00:06:07,660 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 00:06:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-25 00:06:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-09-25 00:06:07,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-25 00:06:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-25 00:06:07,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-25 00:06:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:07,741 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-25 00:06:07,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 00:06:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-25 00:06:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 00:06:07,742 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:07,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:07,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:06:07,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:07,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1625616653, now seen corresponding path program 1 times [2020-09-25 00:06:07,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:07,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411127894] [2020-09-25 00:06:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:07,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:07,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 00:06:07,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:07,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-25 00:06:07,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:07,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:06:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:07,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:06:07,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:06:07,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:07,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:07,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:07,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:07,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:07,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:07,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:07,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:07,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:07,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:07,949 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 00:06:07,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411127894] [2020-09-25 00:06:07,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:07,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 00:06:07,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952982214] [2020-09-25 00:06:07,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 00:06:07,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:07,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 00:06:07,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 00:06:07,954 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-09-25 00:06:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:08,052 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-25 00:06:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 00:06:08,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-25 00:06:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:08,054 INFO L225 Difference]: With dead ends: 27 [2020-09-25 00:06:08,054 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 00:06:08,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:06:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 00:06:08,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-09-25 00:06:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-25 00:06:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-09-25 00:06:08,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-09-25 00:06:08,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:08,062 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-09-25 00:06:08,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 00:06:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-09-25 00:06:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-25 00:06:08,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:08,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:08,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:06:08,064 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1174316682, now seen corresponding path program 2 times [2020-09-25 00:06:08,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:08,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893001040] [2020-09-25 00:06:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-25 00:06:08,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:08,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-09-25 00:06:08,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:06:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:08,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 00:06:08,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:06:08,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:08,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:08,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:08,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:08,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 00:06:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:08,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893001040] [2020-09-25 00:06:08,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:08,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 00:06:08,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769952995] [2020-09-25 00:06:08,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:06:08,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:06:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:06:08,504 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-09-25 00:06:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:08,631 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-25 00:06:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:06:08,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-25 00:06:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:08,633 INFO L225 Difference]: With dead ends: 31 [2020-09-25 00:06:08,633 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 00:06:08,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:06:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 00:06:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-25 00:06:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 00:06:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-09-25 00:06:08,641 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-09-25 00:06:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:08,642 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-09-25 00:06:08,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:06:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-09-25 00:06:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-25 00:06:08,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:08,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:08,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:06:08,644 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:08,644 INFO L82 PathProgramCache]: Analyzing trace with hash -199797369, now seen corresponding path program 3 times [2020-09-25 00:06:08,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:08,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135233282] [2020-09-25 00:06:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 00:06:08,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:08,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-09-25 00:06:08,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:06:08,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:08,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 00:06:08,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:09,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:09,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:09,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:09,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:09,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:09,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:09,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:09,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:09,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:09,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135233282] [2020-09-25 00:06:09,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:09,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:06:09,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080455149] [2020-09-25 00:06:09,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:06:09,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:06:09,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:06:09,047 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-09-25 00:06:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:09,200 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-25 00:06:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 00:06:09,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-09-25 00:06:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:09,202 INFO L225 Difference]: With dead ends: 35 [2020-09-25 00:06:09,202 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 00:06:09,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:06:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 00:06:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-25 00:06:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 00:06:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-25 00:06:09,210 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-09-25 00:06:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:09,210 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-25 00:06:09,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:06:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-25 00:06:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 00:06:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:09,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:09,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:06:09,212 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2014723588, now seen corresponding path program 4 times [2020-09-25 00:06:09,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:09,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381291176] [2020-09-25 00:06:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:09,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 00:06:09,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:09,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-09-25 00:06:09,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 00:06:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:09,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 00:06:09,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:09,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:09,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:09,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:09,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:09,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:09,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381291176] [2020-09-25 00:06:09,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:09,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:06:09,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769098533] [2020-09-25 00:06:09,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:06:09,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:06:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:06:09,709 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-09-25 00:06:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:09,863 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-25 00:06:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 00:06:09,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-25 00:06:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:09,865 INFO L225 Difference]: With dead ends: 39 [2020-09-25 00:06:09,865 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 00:06:09,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:06:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 00:06:09,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 00:06:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 00:06:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-25 00:06:09,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-09-25 00:06:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:09,874 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-25 00:06:09,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:06:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-25 00:06:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 00:06:09,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:09,876 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:09,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:06:09,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:09,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:09,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1723686911, now seen corresponding path program 5 times [2020-09-25 00:06:09,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:09,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777155184] [2020-09-25 00:06:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:10,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 00:06:10,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:10,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-09-25 00:06:10,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:06:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:10,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 00:06:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:10,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:10,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:10,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:10,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:10,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:10,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:10,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:10,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:10,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:10,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777155184] [2020-09-25 00:06:10,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:10,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:06:10,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229118296] [2020-09-25 00:06:10,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:06:10,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:10,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:06:10,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:06:10,534 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-09-25 00:06:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:10,802 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-25 00:06:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 00:06:10,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-09-25 00:06:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:10,804 INFO L225 Difference]: With dead ends: 43 [2020-09-25 00:06:10,804 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 00:06:10,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:06:10,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 00:06:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-25 00:06:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 00:06:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-09-25 00:06:10,811 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 31 [2020-09-25 00:06:10,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:10,812 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-09-25 00:06:10,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:06:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-09-25 00:06:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 00:06:10,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:10,813 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:10,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:06:10,814 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:10,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1455178882, now seen corresponding path program 6 times [2020-09-25 00:06:10,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:10,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909682586] [2020-09-25 00:06:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:10,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:10,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:11,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 00:06:11,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:11,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-09-25 00:06:11,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:11,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 00:06:11,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:11,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 00:06:11,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:11,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:11,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:11,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:11,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:11,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:11,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:11,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:11,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:11,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:11,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909682586] [2020-09-25 00:06:11,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:11,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 00:06:11,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296534350] [2020-09-25 00:06:11,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 00:06:11,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:11,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 00:06:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:06:11,388 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-09-25 00:06:11,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:11,664 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-09-25 00:06:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 00:06:11,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-09-25 00:06:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:11,668 INFO L225 Difference]: With dead ends: 47 [2020-09-25 00:06:11,668 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 00:06:11,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:06:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 00:06:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-25 00:06:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 00:06:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-09-25 00:06:11,681 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 35 [2020-09-25 00:06:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:11,682 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-09-25 00:06:11,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 00:06:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-09-25 00:06:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 00:06:11,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:11,685 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:11,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:06:11,685 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:11,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:11,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1411436667, now seen corresponding path program 7 times [2020-09-25 00:06:11,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:11,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877905833] [2020-09-25 00:06:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:11,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:12,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 00:06:12,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:12,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-09-25 00:06:12,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 00:06:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:12,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 00:06:12,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:12,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:12,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:12,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:12,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:12,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:12,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:12,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:12,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877905833] [2020-09-25 00:06:12,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:12,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 00:06:12,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122502557] [2020-09-25 00:06:12,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 00:06:12,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 00:06:12,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:06:12,500 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-09-25 00:06:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:12,801 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 00:06:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 00:06:12,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-09-25 00:06:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:12,802 INFO L225 Difference]: With dead ends: 51 [2020-09-25 00:06:12,803 INFO L226 Difference]: Without dead ends: 46 [2020-09-25 00:06:12,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 00:06:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-25 00:06:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-25 00:06:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-25 00:06:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-09-25 00:06:12,810 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 39 [2020-09-25 00:06:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:12,811 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-09-25 00:06:12,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 00:06:12,811 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-09-25 00:06:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 00:06:12,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:12,812 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:12,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:06:12,813 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:12,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1883315960, now seen corresponding path program 8 times [2020-09-25 00:06:12,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:12,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294878466] [2020-09-25 00:06:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:12,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:13,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 00:06:13,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:13,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-09-25 00:06:13,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 00:06:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:13,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 00:06:13,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:13,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:13,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:13,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:13,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:13,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:13,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:13,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:13,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:13,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:13,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:13,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294878466] [2020-09-25 00:06:13,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:13,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 00:06:13,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322112458] [2020-09-25 00:06:13,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 00:06:13,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:13,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 00:06:13,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:06:13,512 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-09-25 00:06:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:13,881 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-09-25 00:06:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 00:06:13,881 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-09-25 00:06:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:13,885 INFO L225 Difference]: With dead ends: 55 [2020-09-25 00:06:13,885 INFO L226 Difference]: Without dead ends: 50 [2020-09-25 00:06:13,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 00:06:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-25 00:06:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-09-25 00:06:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-25 00:06:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-25 00:06:13,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 43 [2020-09-25 00:06:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:13,893 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-25 00:06:13,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 00:06:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-25 00:06:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 00:06:13,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:13,895 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:13,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:06:13,895 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:13,896 INFO L82 PathProgramCache]: Analyzing trace with hash -831789323, now seen corresponding path program 9 times [2020-09-25 00:06:13,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:13,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217823827] [2020-09-25 00:06:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:13,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:13,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:14,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 00:06:14,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:14,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-09-25 00:06:14,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:14,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 00:06:14,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:14,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 00:06:14,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:14,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:14,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:14,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:14,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:14,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:14,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:14,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:14,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:14,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217823827] [2020-09-25 00:06:14,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:14,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 00:06:14,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986305368] [2020-09-25 00:06:14,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 00:06:14,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 00:06:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:06:14,974 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-09-25 00:06:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:15,357 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-09-25 00:06:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 00:06:15,358 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-09-25 00:06:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:15,359 INFO L225 Difference]: With dead ends: 59 [2020-09-25 00:06:15,359 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 00:06:15,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 00:06:15,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 00:06:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-09-25 00:06:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 00:06:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-25 00:06:15,366 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 47 [2020-09-25 00:06:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:15,366 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-25 00:06:15,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 00:06:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-25 00:06:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 00:06:15,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:15,368 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:15,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 00:06:15,368 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:15,369 INFO L82 PathProgramCache]: Analyzing trace with hash 164128882, now seen corresponding path program 10 times [2020-09-25 00:06:15,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:15,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871489288] [2020-09-25 00:06:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:15,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:15,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:15,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 00:06:15,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:15,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-09-25 00:06:15,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 00:06:15,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:15,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 00:06:15,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:16,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:16,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:16,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:16,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:16,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:16,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:16,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:16,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871489288] [2020-09-25 00:06:16,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:16,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 00:06:16,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880251226] [2020-09-25 00:06:16,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 00:06:16,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 00:06:16,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-09-25 00:06:16,260 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-09-25 00:06:16,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:16,688 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-25 00:06:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 00:06:16,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-09-25 00:06:16,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:16,690 INFO L225 Difference]: With dead ends: 63 [2020-09-25 00:06:16,690 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 00:06:16,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 00:06:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 00:06:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-25 00:06:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 00:06:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-09-25 00:06:16,706 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 51 [2020-09-25 00:06:16,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:16,706 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-09-25 00:06:16,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 00:06:16,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-09-25 00:06:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 00:06:16,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:16,710 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:16,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 00:06:16,710 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1474159471, now seen corresponding path program 11 times [2020-09-25 00:06:16,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:16,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167875507] [2020-09-25 00:06:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:16,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:16,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:17,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 00:06:17,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:17,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-09-25 00:06:17,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-25 00:06:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:17,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 00:06:17,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:17,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:17,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:17,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:17,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:17,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:17,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:17,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:17,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:17,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:17,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:17,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167875507] [2020-09-25 00:06:17,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:17,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 00:06:17,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541851732] [2020-09-25 00:06:17,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 00:06:17,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:17,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 00:06:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-25 00:06:17,778 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-09-25 00:06:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:18,282 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-25 00:06:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-25 00:06:18,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-09-25 00:06:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:18,285 INFO L225 Difference]: With dead ends: 67 [2020-09-25 00:06:18,285 INFO L226 Difference]: Without dead ends: 62 [2020-09-25 00:06:18,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 00:06:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-25 00:06:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-09-25 00:06:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 00:06:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-09-25 00:06:18,293 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 55 [2020-09-25 00:06:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:18,294 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-09-25 00:06:18,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-25 00:06:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-09-25 00:06:18,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 00:06:18,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:18,298 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:18,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 00:06:18,298 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1486067692, now seen corresponding path program 12 times [2020-09-25 00:06:18,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:18,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480437475] [2020-09-25 00:06:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:18,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:18,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:19,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 00:06:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-09-25 00:06:19,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-25 00:06:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:19,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 00:06:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:19,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:19,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:19,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:19,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:19,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:19,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:19,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480437475] [2020-09-25 00:06:19,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:19,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-25 00:06:19,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115334247] [2020-09-25 00:06:19,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-25 00:06:19,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-25 00:06:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-09-25 00:06:19,595 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-09-25 00:06:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:20,157 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-25 00:06:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-25 00:06:20,158 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-09-25 00:06:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:20,159 INFO L225 Difference]: With dead ends: 71 [2020-09-25 00:06:20,160 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 00:06:20,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=843, Invalid=1707, Unknown=0, NotChecked=0, Total=2550 [2020-09-25 00:06:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 00:06:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-09-25 00:06:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 00:06:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-09-25 00:06:20,167 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 59 [2020-09-25 00:06:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:20,167 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-09-25 00:06:20,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-25 00:06:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-09-25 00:06:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 00:06:20,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:20,168 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:20,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 00:06:20,169 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash -433011223, now seen corresponding path program 13 times [2020-09-25 00:06:20,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:20,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925538332] [2020-09-25 00:06:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:20,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:20,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:21,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 00:06:21,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:21,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-09-25 00:06:21,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-25 00:06:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-25 00:06:21,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:21,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:21,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:21,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:21,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:21,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:06:21,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:21,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:21,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:21,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:21,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:21,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925538332] [2020-09-25 00:06:21,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:21,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-25 00:06:21,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650169818] [2020-09-25 00:06:21,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-25 00:06:21,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:21,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-25 00:06:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-09-25 00:06:21,491 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-09-25 00:06:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:22,209 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-09-25 00:06:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-25 00:06:22,210 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-09-25 00:06:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:22,211 INFO L225 Difference]: With dead ends: 75 [2020-09-25 00:06:22,211 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 00:06:22,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2020-09-25 00:06:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 00:06:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-09-25 00:06:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-25 00:06:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-09-25 00:06:22,218 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 63 [2020-09-25 00:06:22,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:22,219 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-09-25 00:06:22,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-25 00:06:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-09-25 00:06:22,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 00:06:22,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:22,220 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:22,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 00:06:22,220 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash -446911130, now seen corresponding path program 14 times [2020-09-25 00:06:22,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:22,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232055163] [2020-09-25 00:06:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:22,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:22,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:23,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:23,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 00:06:23,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:23,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-09-25 00:06:23,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-25 00:06:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:23,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-25 00:06:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:23,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:23,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:23,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:23,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:23,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:23,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:23,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:23,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:23,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:23,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232055163] [2020-09-25 00:06:23,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:23,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-25 00:06:23,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078444309] [2020-09-25 00:06:23,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-25 00:06:23,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:23,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-25 00:06:23,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-25 00:06:23,693 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-09-25 00:06:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:24,507 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-09-25 00:06:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-25 00:06:24,508 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-09-25 00:06:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:24,509 INFO L225 Difference]: With dead ends: 79 [2020-09-25 00:06:24,509 INFO L226 Difference]: Without dead ends: 74 [2020-09-25 00:06:24,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2020-09-25 00:06:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-25 00:06:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-09-25 00:06:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 00:06:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-25 00:06:24,516 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 67 [2020-09-25 00:06:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:24,517 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-25 00:06:24,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-25 00:06:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-25 00:06:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 00:06:24,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:24,518 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:24,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 00:06:24,518 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash 354324067, now seen corresponding path program 15 times [2020-09-25 00:06:24,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:24,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866302239] [2020-09-25 00:06:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:24,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:24,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:25,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:25,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 00:06:25,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:25,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-09-25 00:06:25,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:25,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-25 00:06:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 00:06:25,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:26,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:26,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:26,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:26,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:26,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:26,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:26,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:26,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:26,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:26,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:26,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866302239] [2020-09-25 00:06:26,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:26,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-25 00:06:26,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573139699] [2020-09-25 00:06:26,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-25 00:06:26,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-25 00:06:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-09-25 00:06:26,271 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-09-25 00:06:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:27,165 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-09-25 00:06:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-25 00:06:27,166 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-09-25 00:06:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:27,167 INFO L225 Difference]: With dead ends: 83 [2020-09-25 00:06:27,167 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 00:06:27,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1278, Invalid=2628, Unknown=0, NotChecked=0, Total=3906 [2020-09-25 00:06:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 00:06:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-25 00:06:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 00:06:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-09-25 00:06:27,176 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 71 [2020-09-25 00:06:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:27,176 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-09-25 00:06:27,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-25 00:06:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-09-25 00:06:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 00:06:27,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:27,177 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:27,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 00:06:27,178 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash -555898656, now seen corresponding path program 16 times [2020-09-25 00:06:27,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:27,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125027224] [2020-09-25 00:06:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:27,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:28,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:28,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 00:06:28,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:28,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1316 [2020-09-25 00:06:28,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:28,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-25 00:06:28,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:28,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 00:06:28,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:06:29,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:29,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:29,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:29,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:29,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:29,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:29,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:29,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:29,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:29,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125027224] [2020-09-25 00:06:29,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:29,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-25 00:06:29,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087795400] [2020-09-25 00:06:29,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-25 00:06:29,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-25 00:06:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 00:06:29,210 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-09-25 00:06:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:30,138 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-09-25 00:06:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-25 00:06:30,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-09-25 00:06:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:30,140 INFO L225 Difference]: With dead ends: 87 [2020-09-25 00:06:30,140 INFO L226 Difference]: Without dead ends: 82 [2020-09-25 00:06:30,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2020-09-25 00:06:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-25 00:06:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-09-25 00:06:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-25 00:06:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-09-25 00:06:30,146 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 75 [2020-09-25 00:06:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:30,146 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-09-25 00:06:30,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-25 00:06:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-09-25 00:06:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 00:06:30,147 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:30,147 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:30,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 00:06:30,148 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:30,148 INFO L82 PathProgramCache]: Analyzing trace with hash 643906781, now seen corresponding path program 17 times [2020-09-25 00:06:30,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:30,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565276990] [2020-09-25 00:06:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:30,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:30,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:31,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:31,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-25 00:06:31,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:31,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1440 [2020-09-25 00:06:31,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-25 00:06:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:31,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-25 00:06:31,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:32,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:32,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:32,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:32,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:32,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:32,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:32,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:32,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:32,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:32,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:32,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:32,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565276990] [2020-09-25 00:06:32,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:32,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-25 00:06:32,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388966046] [2020-09-25 00:06:32,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-25 00:06:32,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:32,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-25 00:06:32,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-09-25 00:06:32,239 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-09-25 00:06:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:33,424 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-25 00:06:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-25 00:06:33,425 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-09-25 00:06:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:33,426 INFO L225 Difference]: With dead ends: 91 [2020-09-25 00:06:33,427 INFO L226 Difference]: Without dead ends: 86 [2020-09-25 00:06:33,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1618, Invalid=3352, Unknown=0, NotChecked=0, Total=4970 [2020-09-25 00:06:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-25 00:06:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-09-25 00:06:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-25 00:06:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-09-25 00:06:33,435 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 79 [2020-09-25 00:06:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:33,435 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-09-25 00:06:33,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-25 00:06:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-09-25 00:06:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-25 00:06:33,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:33,437 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:33,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-25 00:06:33,437 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash 433097306, now seen corresponding path program 18 times [2020-09-25 00:06:33,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:33,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891507868] [2020-09-25 00:06:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:33,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:33,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:34,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-25 00:06:34,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:34,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1477 [2020-09-25 00:06:34,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-25 00:06:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-25 00:06:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:35,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:35,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:35,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:35,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:35,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:35,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:35,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:35,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891507868] [2020-09-25 00:06:35,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:35,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-25 00:06:35,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278614187] [2020-09-25 00:06:35,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-25 00:06:35,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:35,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-25 00:06:35,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 00:06:35,704 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-09-25 00:06:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:37,054 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-09-25 00:06:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-25 00:06:37,055 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-09-25 00:06:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:37,056 INFO L225 Difference]: With dead ends: 95 [2020-09-25 00:06:37,056 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 00:06:37,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1803, Invalid=3747, Unknown=0, NotChecked=0, Total=5550 [2020-09-25 00:06:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 00:06:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-09-25 00:06:37,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 00:06:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-09-25 00:06:37,063 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 83 [2020-09-25 00:06:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:37,063 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-09-25 00:06:37,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-25 00:06:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-09-25 00:06:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-25 00:06:37,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:37,064 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:37,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-25 00:06:37,065 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:37,065 INFO L82 PathProgramCache]: Analyzing trace with hash 28496215, now seen corresponding path program 19 times [2020-09-25 00:06:37,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:37,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147626522] [2020-09-25 00:06:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:37,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:38,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:38,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-25 00:06:38,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:39,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:39,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:39,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:39,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:39,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:39,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:39,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:39,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:39,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:39,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:39,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147626522] [2020-09-25 00:06:39,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:39,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-25 00:06:39,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708869103] [2020-09-25 00:06:39,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-25 00:06:39,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-25 00:06:39,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-25 00:06:39,535 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-09-25 00:06:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:40,961 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-09-25 00:06:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-25 00:06:40,962 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-09-25 00:06:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:40,963 INFO L225 Difference]: With dead ends: 99 [2020-09-25 00:06:40,963 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 00:06:40,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2020-09-25 00:06:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 00:06:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-09-25 00:06:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-25 00:06:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-25 00:06:40,971 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 87 [2020-09-25 00:06:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:40,971 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-25 00:06:40,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-25 00:06:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-25 00:06:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 00:06:40,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:40,972 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:40,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-25 00:06:40,973 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:40,973 INFO L82 PathProgramCache]: Analyzing trace with hash 284119508, now seen corresponding path program 20 times [2020-09-25 00:06:40,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:40,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316918275] [2020-09-25 00:06:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:40,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:41,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:42,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:42,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-25 00:06:42,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:42,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-09-25 00:06:42,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-25 00:06:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:42,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-25 00:06:42,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:43,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:43,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:43,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316918275] [2020-09-25 00:06:43,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:43,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-25 00:06:43,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133672704] [2020-09-25 00:06:43,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-25 00:06:43,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-25 00:06:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 00:06:43,560 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-09-25 00:06:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:45,117 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-09-25 00:06:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-25 00:06:45,117 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-09-25 00:06:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:45,118 INFO L225 Difference]: With dead ends: 103 [2020-09-25 00:06:45,119 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 00:06:45,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2203, Invalid=4603, Unknown=0, NotChecked=0, Total=6806 [2020-09-25 00:06:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 00:06:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-09-25 00:06:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 00:06:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-09-25 00:06:45,126 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 91 [2020-09-25 00:06:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:45,126 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-09-25 00:06:45,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-25 00:06:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-09-25 00:06:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-25 00:06:45,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:45,128 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:45,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-25 00:06:45,128 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:45,129 INFO L82 PathProgramCache]: Analyzing trace with hash 885869521, now seen corresponding path program 21 times [2020-09-25 00:06:45,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:45,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288455225] [2020-09-25 00:06:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:45,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:45,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:46,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:46,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-25 00:06:46,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1666 [2020-09-25 00:06:46,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:46,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-25 00:06:46,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:46,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-25 00:06:46,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:47,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:47,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:47,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:47,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:47,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288455225] [2020-09-25 00:06:47,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:47,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-25 00:06:47,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680594825] [2020-09-25 00:06:47,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-25 00:06:47,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:47,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-25 00:06:47,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-09-25 00:06:47,894 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-09-25 00:06:49,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:49,574 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-09-25 00:06:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-25 00:06:49,575 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-09-25 00:06:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:49,576 INFO L225 Difference]: With dead ends: 107 [2020-09-25 00:06:49,576 INFO L226 Difference]: Without dead ends: 102 [2020-09-25 00:06:49,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2418, Invalid=5064, Unknown=0, NotChecked=0, Total=7482 [2020-09-25 00:06:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-25 00:06:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-09-25 00:06:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 00:06:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-09-25 00:06:49,582 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 95 [2020-09-25 00:06:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:49,582 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-09-25 00:06:49,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-25 00:06:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-09-25 00:06:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-25 00:06:49,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:49,583 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:49,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-25 00:06:49,584 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:49,584 INFO L82 PathProgramCache]: Analyzing trace with hash -453771442, now seen corresponding path program 22 times [2020-09-25 00:06:49,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:49,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835816733] [2020-09-25 00:06:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:49,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:49,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:51,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:51,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-25 00:06:51,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:51,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1930 [2020-09-25 00:06:51,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:51,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-25 00:06:51,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:51,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-25 00:06:51,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:52,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:52,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:52,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:52,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 00:06:52,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:52,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:52,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:52,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:06:52,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835816733] [2020-09-25 00:06:52,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:52,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-25 00:06:52,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300737378] [2020-09-25 00:06:52,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-25 00:06:52,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-25 00:06:52,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 00:06:52,695 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-09-25 00:06:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:54,585 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-09-25 00:06:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-25 00:06:54,586 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-09-25 00:06:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:54,587 INFO L225 Difference]: With dead ends: 111 [2020-09-25 00:06:54,587 INFO L226 Difference]: Without dead ends: 106 [2020-09-25 00:06:54,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2020-09-25 00:06:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-25 00:06:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-09-25 00:06:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 00:06:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-09-25 00:06:54,592 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 99 [2020-09-25 00:06:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:54,592 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-09-25 00:06:54,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-25 00:06:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-09-25 00:06:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-25 00:06:54,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:54,594 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:54,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-25 00:06:54,594 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash -211112885, now seen corresponding path program 23 times [2020-09-25 00:06:54,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:54,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311746967] [2020-09-25 00:06:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:54,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:54,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:56,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:56,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-25 00:06:56,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 00:06:56,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-09-25 00:06:56,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-09-25 00:06:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 00:06:56,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-25 00:06:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0