/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:09:38,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:09:38,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:09:38,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:09:38,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:09:38,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:09:38,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:09:38,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:09:38,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:09:38,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:09:38,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:09:38,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:09:38,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:09:38,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:09:38,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:09:38,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:09:38,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:09:38,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:09:38,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:09:38,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:09:38,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:09:38,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:09:38,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:09:38,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:09:38,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:09:38,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:09:38,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:09:38,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:09:38,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:09:38,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:09:38,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:09:38,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:09:38,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:09:38,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:09:38,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:09:38,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:09:38,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:09:38,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:09:38,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:09:38,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:09:38,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:09:38,176 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 01:09:38,202 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:09:38,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:09:38,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:09:38,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:09:38,205 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:09:38,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:09:38,205 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:09:38,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:09:38,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:09:38,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:09:38,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:09:38,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:09:38,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:09:38,207 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:09:38,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:09:38,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:09:38,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:09:38,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:09:38,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:09:38,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:09:38,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:09:38,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:09:38,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:09:38,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:09:38,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:09:38,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:09:38,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:09:38,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:09:38,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:09:38,210 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:09:38,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:09:38,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:09:38,796 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:09:38,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:09:38,798 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:09:38,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 01:09:38,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6217cd38f/220117c3a273498ebfa2ec84387d6c96/FLAGe5360472a [2020-09-25 01:09:39,432 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:09:39,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01-1.i [2020-09-25 01:09:39,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6217cd38f/220117c3a273498ebfa2ec84387d6c96/FLAGe5360472a [2020-09-25 01:09:39,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6217cd38f/220117c3a273498ebfa2ec84387d6c96 [2020-09-25 01:09:39,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:09:39,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:09:39,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:39,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:09:39,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:09:39,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b2c62b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:39, skipping insertion in model container [2020-09-25 01:09:39,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:09:39" (1/1) ... [2020-09-25 01:09:39,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:09:39,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:09:40,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:40,095 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:09:40,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:09:40,141 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:09:40,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40 WrapperNode [2020-09-25 01:09:40,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:09:40,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:09:40,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:09:40,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:09:40,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (1/1) ... [2020-09-25 01:09:40,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:09:40,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:09:40,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:09:40,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:09:40,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (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 01:09:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:09:40,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:09:40,346 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:09:40,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:09:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:09:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:09:40,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-25 01:09:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:09:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:09:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:09:40,563 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:09:40,564 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:09:40,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:40 BoogieIcfgContainer [2020-09-25 01:09:40,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:09:40,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:09:40,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:09:40,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:09:40,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:09:39" (1/3) ... [2020-09-25 01:09:40,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe7aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:40, skipping insertion in model container [2020-09-25 01:09:40,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:09:40" (2/3) ... [2020-09-25 01:09:40,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45fe7aa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:09:40, skipping insertion in model container [2020-09-25 01:09:40,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:09:40" (3/3) ... [2020-09-25 01:09:40,580 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2020-09-25 01:09:40,594 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:09:40,608 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:09:40,635 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:09:40,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:09:40,675 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:09:40,675 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:09:40,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:09:40,676 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:09:40,676 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:09:40,676 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:09:40,676 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:09:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-25 01:09:40,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 01:09:40,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:40,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:40,732 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:40,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:40,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1882057920, now seen corresponding path program 1 times [2020-09-25 01:09:40,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:40,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233850823] [2020-09-25 01:09:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 01:09:41,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:09:41,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-25 01:09:41,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:41,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-25 01:09:41,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-25 01:09:41,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:41,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:09:41,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:41,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:41,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:41,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:41,158 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 01:09:41,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233850823] [2020-09-25 01:09:41,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:41,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 01:09:41,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193204625] [2020-09-25 01:09:41,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 01:09:41,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 01:09:41,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:41,191 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-09-25 01:09:41,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:41,232 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-25 01:09:41,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 01:09:41,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-09-25 01:09:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:41,246 INFO L225 Difference]: With dead ends: 37 [2020-09-25 01:09:41,246 INFO L226 Difference]: Without dead ends: 20 [2020-09-25 01:09:41,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:09:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-25 01:09:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-25 01:09:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-25 01:09:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-25 01:09:41,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-09-25 01:09:41,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:41,294 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-25 01:09:41,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 01:09:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-25 01:09:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-25 01:09:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:41,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:41,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:09:41,297 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1869128626, now seen corresponding path program 1 times [2020-09-25 01:09:41,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:41,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650583886] [2020-09-25 01:09:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 01:09:41,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-25 01:09:41,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 01:09:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 01:09:41,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:41,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:41,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:41,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:41,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:41,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 01:09:41,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:41,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:41,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:41,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:41,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:41,642 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 01:09:41,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650583886] [2020-09-25 01:09:41,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:09:41,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 01:09:41,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953863019] [2020-09-25 01:09:41,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:41,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:41,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:41,653 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2020-09-25 01:09:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:41,731 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-09-25 01:09:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:09:41,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-25 01:09:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:41,734 INFO L225 Difference]: With dead ends: 31 [2020-09-25 01:09:41,735 INFO L226 Difference]: Without dead ends: 26 [2020-09-25 01:09:41,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:09:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-25 01:09:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-25 01:09:41,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 01:09:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-09-25 01:09:41,748 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2020-09-25 01:09:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:41,749 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-09-25 01:09:41,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-09-25 01:09:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-25 01:09:41,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:41,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:41,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:09:41,751 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:41,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1535432394, now seen corresponding path program 1 times [2020-09-25 01:09:41,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:41,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500555999] [2020-09-25 01:09:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:41,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-25 01:09:42,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:42,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-25 01:09:42,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 01:09:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 01:09:42,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:42,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:42,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:42,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:42,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:42,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:42,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:42,373 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 01:09:42,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500555999] [2020-09-25 01:09:42,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:42,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:09:42,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096684733] [2020-09-25 01:09:42,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:09:42,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:42,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:09:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:42,376 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-09-25 01:09:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:42,585 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-25 01:09:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 01:09:42,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-09-25 01:09:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:42,587 INFO L225 Difference]: With dead ends: 48 [2020-09-25 01:09:42,587 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 01:09:42,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:09:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 01:09:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-25 01:09:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 01:09:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 01:09:42,594 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-09-25 01:09:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:42,595 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 01:09:42,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:09:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 01:09:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 01:09:42,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:42,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:42,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:09:42,597 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash -927596731, now seen corresponding path program 1 times [2020-09-25 01:09:42,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:42,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035871996] [2020-09-25 01:09:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 01:09:42,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:42,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-09-25 01:09:42,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:09:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 01:09:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:42,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:42,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:42,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:42,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:42,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:42,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035871996] [2020-09-25 01:09:42,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:42,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 01:09:42,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695058732] [2020-09-25 01:09:42,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:09:42,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:42,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:09:42,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:09:42,734 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 01:09:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:42,788 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-09-25 01:09:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 01:09:42,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-09-25 01:09:42,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:42,790 INFO L225 Difference]: With dead ends: 42 [2020-09-25 01:09:42,790 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 01:09:42,791 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 01:09:42,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 01:09:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-25 01:09:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 01:09:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 01:09:42,797 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-09-25 01:09:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:42,797 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 01:09:42,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:09:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 01:09:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 01:09:42,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:42,798 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:42,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:09:42,799 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:42,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1778100254, now seen corresponding path program 2 times [2020-09-25 01:09:42,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:42,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242855422] [2020-09-25 01:09:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:42,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:43,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 01:09:43,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:43,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-25 01:09:43,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:43,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-25 01:09:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 01:09:43,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 01:09:43,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:43,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:43,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:43,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:43,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:43,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:43,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:43,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:43,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242855422] [2020-09-25 01:09:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:43,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 01:09:43,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874950563] [2020-09-25 01:09:43,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 01:09:43,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:43,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 01:09:43,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-09-25 01:09:43,283 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states. [2020-09-25 01:09:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:43,747 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 01:09:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 01:09:43,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-09-25 01:09:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:43,749 INFO L225 Difference]: With dead ends: 42 [2020-09-25 01:09:43,749 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 01:09:43,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-25 01:09:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 01:09:43,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-09-25 01:09:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 01:09:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 01:09:43,757 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 26 [2020-09-25 01:09:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:43,757 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 01:09:43,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 01:09:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 01:09:43,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 01:09:43,759 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:43,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:43,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:09:43,759 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1884066515, now seen corresponding path program 2 times [2020-09-25 01:09:43,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:43,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676024999] [2020-09-25 01:09:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:43,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 01:09:43,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:43,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-25 01:09:43,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:09:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:43,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 01:09:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:43,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:43,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:43,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:43,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:43,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:43,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:43,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:43,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:43,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:43,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:43,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676024999] [2020-09-25 01:09:43,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:43,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 01:09:43,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631741572] [2020-09-25 01:09:43,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:09:43,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:09:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:09:43,918 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 01:09:43,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:43,994 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-25 01:09:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 01:09:43,995 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-09-25 01:09:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:43,996 INFO L225 Difference]: With dead ends: 48 [2020-09-25 01:09:43,996 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 01:09:43,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 01:09:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-25 01:09:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-25 01:09:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-09-25 01:09:44,002 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2020-09-25 01:09:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:44,003 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-09-25 01:09:44,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:09:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-09-25 01:09:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 01:09:44,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:44,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:44,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:09:44,005 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892486, now seen corresponding path program 3 times [2020-09-25 01:09:44,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:44,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799459056] [2020-09-25 01:09:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:44,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 01:09:44,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-09-25 01:09:44,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 01:09:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-25 01:09:44,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 01:09:44,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:44,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:44,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:44,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:44,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:44,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:44,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:44,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:44,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 01:09:44,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799459056] [2020-09-25 01:09:44,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:44,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 01:09:44,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44967547] [2020-09-25 01:09:44,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 01:09:44,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 01:09:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:44,596 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 13 states. [2020-09-25 01:09:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:44,929 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-09-25 01:09:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:09:44,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-25 01:09:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:44,931 INFO L225 Difference]: With dead ends: 47 [2020-09-25 01:09:44,931 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 01:09:44,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-09-25 01:09:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 01:09:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-25 01:09:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-25 01:09:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-25 01:09:44,947 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 32 [2020-09-25 01:09:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:44,947 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-25 01:09:44,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 01:09:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-25 01:09:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 01:09:44,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:44,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:44,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:09:44,951 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1557187861, now seen corresponding path program 3 times [2020-09-25 01:09:44,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:44,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759737526] [2020-09-25 01:09:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:44,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 01:09:45,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-25 01:09:45,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:09:45,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:45,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-25 01:09:45,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:45,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:45,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:45,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:45,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759737526] [2020-09-25 01:09:45,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:45,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 01:09:45,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764901961] [2020-09-25 01:09:45,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 01:09:45,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:45,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 01:09:45,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:09:45,220 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-09-25 01:09:45,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:45,337 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-09-25 01:09:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 01:09:45,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-25 01:09:45,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:45,339 INFO L225 Difference]: With dead ends: 60 [2020-09-25 01:09:45,339 INFO L226 Difference]: Without dead ends: 49 [2020-09-25 01:09:45,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:09:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-25 01:09:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-09-25 01:09:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 01:09:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-09-25 01:09:45,355 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 37 [2020-09-25 01:09:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:45,355 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-09-25 01:09:45,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 01:09:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-09-25 01:09:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 01:09:45,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:45,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:45,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:09:45,361 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:45,362 INFO L82 PathProgramCache]: Analyzing trace with hash -2133811459, now seen corresponding path program 4 times [2020-09-25 01:09:45,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:45,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095340315] [2020-09-25 01:09:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 01:09:45,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-09-25 01:09:45,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:09:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:45,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 01:09:45,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:45,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:45,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:45,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:45,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:45,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:45,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095340315] [2020-09-25 01:09:45,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:45,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:09:45,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529121090] [2020-09-25 01:09:45,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:09:45,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:45,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:09:45,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:09:45,725 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2020-09-25 01:09:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:45,902 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-09-25 01:09:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 01:09:45,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-09-25 01:09:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:45,904 INFO L225 Difference]: With dead ends: 66 [2020-09-25 01:09:45,904 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 01:09:45,904 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 01:09:45,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 01:09:45,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-25 01:09:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-25 01:09:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-09-25 01:09:45,910 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-09-25 01:09:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:45,911 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-09-25 01:09:45,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:09:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-09-25 01:09:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 01:09:45,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:45,912 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:45,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:09:45,913 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:45,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:45,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1351967461, now seen corresponding path program 5 times [2020-09-25 01:09:45,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:45,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932210146] [2020-09-25 01:09:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:45,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:46,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:46,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-25 01:09:46,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:46,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 285 [2020-09-25 01:09:46,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:09:46,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:46,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 01:09:46,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:46,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:46,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:46,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:46,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:46,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:46,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:46,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:46,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:46,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:46,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:46,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 21 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:46,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932210146] [2020-09-25 01:09:46,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:46,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 01:09:46,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096385904] [2020-09-25 01:09:46,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 01:09:46,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 01:09:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:09:46,349 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 13 states. [2020-09-25 01:09:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:46,519 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-09-25 01:09:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 01:09:46,520 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-09-25 01:09:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:46,521 INFO L225 Difference]: With dead ends: 72 [2020-09-25 01:09:46,522 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 01:09:46,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-25 01:09:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 01:09:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-09-25 01:09:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 01:09:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-09-25 01:09:46,529 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-09-25 01:09:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:46,529 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-09-25 01:09:46,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 01:09:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-09-25 01:09:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 01:09:46,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:46,531 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:46,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 01:09:46,531 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:46,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1927178035, now seen corresponding path program 6 times [2020-09-25 01:09:46,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:46,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348933871] [2020-09-25 01:09:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:46,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:46,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:46,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 01:09:46,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-09-25 01:09:46,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 01:09:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:46,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 01:09:46,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:47,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:47,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:47,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:47,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348933871] [2020-09-25 01:09:47,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:47,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 01:09:47,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498456585] [2020-09-25 01:09:47,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 01:09:47,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 01:09:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:09:47,089 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 15 states. [2020-09-25 01:09:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:47,310 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-09-25 01:09:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 01:09:47,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-09-25 01:09:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:47,312 INFO L225 Difference]: With dead ends: 78 [2020-09-25 01:09:47,312 INFO L226 Difference]: Without dead ends: 67 [2020-09-25 01:09:47,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-25 01:09:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-25 01:09:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-09-25 01:09:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-25 01:09:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-09-25 01:09:47,319 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 55 [2020-09-25 01:09:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:47,320 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-09-25 01:09:47,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 01:09:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-09-25 01:09:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 01:09:47,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:47,321 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:47,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 01:09:47,322 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash -879247179, now seen corresponding path program 7 times [2020-09-25 01:09:47,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:47,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071813344] [2020-09-25 01:09:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-25 01:09:47,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-09-25 01:09:47,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 01:09:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:47,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-09-25 01:09:47,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:47,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:47,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:47,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:47,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:47,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:09:47,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:47,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:09:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:47,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071813344] [2020-09-25 01:09:47,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:47,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 01:09:47,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635619387] [2020-09-25 01:09:47,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 01:09:47,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 01:09:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:09:47,954 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 17 states. [2020-09-25 01:09:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:48,236 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-09-25 01:09:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 01:09:48,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 61 [2020-09-25 01:09:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:48,238 INFO L225 Difference]: With dead ends: 84 [2020-09-25 01:09:48,238 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 01:09:48,239 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 01:09:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 01:09:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-09-25 01:09:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 01:09:48,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-09-25 01:09:48,251 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2020-09-25 01:09:48,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:48,251 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-09-25 01:09:48,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 01:09:48,251 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-09-25 01:09:48,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 01:09:48,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:48,253 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:48,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 01:09:48,253 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:48,254 INFO L82 PathProgramCache]: Analyzing trace with hash -583378275, now seen corresponding path program 8 times [2020-09-25 01:09:48,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:48,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480769180] [2020-09-25 01:09:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:48,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:48,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:48,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-25 01:09:48,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:48,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-09-25 01:09:48,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 01:09:48,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 01:09:48,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-25 01:09:48,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:09:49,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:09:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:09:49,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:09:49,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:09:49,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:09:49,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:09:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:09:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:09:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:09:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:09:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:09:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 01:09:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 33 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:09:49,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480769180] [2020-09-25 01:09:49,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:09:49,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 01:09:49,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767566109] [2020-09-25 01:09:49,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 01:09:49,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:09:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 01:09:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-25 01:09:49,218 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 19 states. [2020-09-25 01:09:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:09:49,732 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2020-09-25 01:09:49,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 01:09:49,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2020-09-25 01:09:49,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:09:49,735 INFO L225 Difference]: With dead ends: 89 [2020-09-25 01:09:49,735 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 01:09:49,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 01:09:49,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 01:09:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-25 01:09:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 01:09:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-09-25 01:09:49,746 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-09-25 01:09:49,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:09:49,746 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-09-25 01:09:49,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 01:09:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-09-25 01:09:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 01:09:49,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:09:49,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:09:49,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 01:09:49,748 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:09:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:09:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 929818245, now seen corresponding path program 9 times [2020-09-25 01:09:49,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:09:49,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351115515] [2020-09-25 01:09:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:09:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 01:09:49,769 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 01:09:49,769 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 01:09:49,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 01:09:49,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:09:49 BoogieIcfgContainer [2020-09-25 01:09:49,807 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:09:49,811 INFO L168 Benchmark]: Toolchain (without parser) took 10009.32 ms. Allocated memory was 146.3 MB in the beginning and 301.5 MB in the end (delta: 155.2 MB). Free memory was 101.9 MB in the beginning and 255.8 MB in the end (delta: -153.9 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:49,813 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 01:09:49,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.68 ms. Allocated memory is still 146.3 MB. Free memory was 101.3 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:49,814 INFO L168 Benchmark]: Boogie Preprocessor took 122.20 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.9 MB in the beginning and 182.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:49,822 INFO L168 Benchmark]: RCFGBuilder took 304.90 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 169.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:49,823 INFO L168 Benchmark]: TraceAbstraction took 9235.82 ms. Allocated memory was 202.4 MB in the beginning and 301.5 MB in the end (delta: 99.1 MB). Free memory was 169.3 MB in the beginning and 255.8 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-25 01:09:49,829 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.3 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 335.68 ms. Allocated memory is still 146.3 MB. Free memory was 101.3 MB in the beginning and 91.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.20 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 91.9 MB in the beginning and 182.4 MB in the end (delta: -90.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.90 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 169.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9235.82 ms. Allocated memory was 202.4 MB in the beginning and 301.5 MB in the end (delta: 99.1 MB). Free memory was 169.3 MB in the beginning and 255.8 MB in the end (delta: -86.6 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.1s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 201 SDslu, 1069 SDs, 0 SdLazy, 775 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 266 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 32 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 547 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 461 ConstructedInterpolants, 0 QuantifiedInterpolants, 60623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 160/758 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...