/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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:51:53,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:51:53,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:51:53,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:51:53,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:51:53,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:51:53,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:51:53,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:51:53,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:51:53,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:51:53,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:51:53,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:51:53,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:51:53,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:51:53,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:51:53,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:51:53,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:51:53,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:51:53,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:51:53,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:51:53,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:51:53,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:51:53,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:51:53,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:51:53,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:51:53,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:51:53,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:51:53,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:51:53,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:51:53,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:51:53,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:51:53,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:51:53,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:51:53,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:51:53,152 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:51:53,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:51:53,153 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:51:53,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:51:53,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:51:53,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:51:53,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:51:53,158 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 [2020-09-24 21:51:53,211 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:51:53,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:51:53,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:51:53,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:51:53,214 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:51:53,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:51:53,215 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:51:53,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:51:53,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:51:53,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:51:53,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:51:53,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:51:53,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:51:53,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:51:53,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:51:53,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:51:53,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:51:53,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:51:53,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:51:53,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:51:53,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:51:53,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:51:53,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:51:53,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:51:53,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:51:53,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:51:53,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:51:53,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:51:53,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:51:53,221 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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:51:53,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:51:53,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:51:53,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:51:53,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:51:53,699 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:51:53,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-24 21:51:53,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b8cdba11/42a7b850ef3d4836badaf88b0a608d2a/FLAG844be4326 [2020-09-24 21:51:54,338 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:51:54,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-24 21:51:54,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b8cdba11/42a7b850ef3d4836badaf88b0a608d2a/FLAG844be4326 [2020-09-24 21:51:54,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5b8cdba11/42a7b850ef3d4836badaf88b0a608d2a [2020-09-24 21:51:54,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:51:54,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:51:54,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:54,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:51:54,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:51:54,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:54" (1/1) ... [2020-09-24 21:51:54,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae8da2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:54, skipping insertion in model container [2020-09-24 21:51:54,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:54" (1/1) ... [2020-09-24 21:51:54,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:51:54,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:51:54,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:54,989 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:51:55,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:55,020 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:51:55,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55 WrapperNode [2020-09-24 21:51:55,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:55,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:51:55,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:51:55,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:51:55,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (1/1) ... [2020-09-24 21:51:55,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:51:55,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:51:55,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:51:55,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:51:55,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (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 [2020-09-24 21:51:55,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:51:55,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:51:55,214 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:51:55,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:51:55,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:51:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:51:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:51:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:51:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:51:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:51:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:51:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:51:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:51:55,497 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:51:55,498 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:51:55,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:55 BoogieIcfgContainer [2020-09-24 21:51:55,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:51:55,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:51:55,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:51:55,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:51:55,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:51:54" (1/3) ... [2020-09-24 21:51:55,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a09d05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:55, skipping insertion in model container [2020-09-24 21:51:55,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:55" (2/3) ... [2020-09-24 21:51:55,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a09d05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:55, skipping insertion in model container [2020-09-24 21:51:55,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:55" (3/3) ... [2020-09-24 21:51:55,533 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-09-24 21:51:55,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:51:55,552 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:51:55,573 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:51:55,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:51:55,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:51:55,602 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:51:55,602 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:51:55,602 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:51:55,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:51:55,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:51:55,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:51:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 21:51:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:51:55,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:55,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:55,631 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2104509233, now seen corresponding path program 1 times [2020-09-24 21:51:55,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:55,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957613419] [2020-09-24 21:51:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:55,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:51:55,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:55,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 21:51:55,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:55,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:55,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:51:55,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:55,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:51:55,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:55,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:55,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:55,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:55,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:55,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:55,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:55,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:55,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:55,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957613419] [2020-09-24 21:51:55,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:55,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 21:51:55,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959558775] [2020-09-24 21:51:55,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 21:51:55,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:55,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 21:51:55,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 21:51:55,904 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-24 21:51:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:55,932 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-24 21:51:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 21:51:55,934 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-24 21:51:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:55,945 INFO L225 Difference]: With dead ends: 41 [2020-09-24 21:51:55,945 INFO L226 Difference]: Without dead ends: 21 [2020-09-24 21:51:55,949 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 [2020-09-24 21:51:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-24 21:51:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-24 21:51:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 21:51:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-24 21:51:55,995 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-24 21:51:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:55,996 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-24 21:51:55,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 21:51:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-24 21:51:55,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:51:55,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:55,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:55,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:51:55,998 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2097121065, now seen corresponding path program 1 times [2020-09-24 21:51:55,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:55,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387780245] [2020-09-24 21:51:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:56,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:56,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:51:56,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 21:51:56,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:51:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:51:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:51:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:56,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:56,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:56,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:56,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:56,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:56,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:56,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:56,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:56,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:56,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:56,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387780245] [2020-09-24 21:51:56,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:56,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:51:56,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833166468] [2020-09-24 21:51:56,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:51:56,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:56,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:51:56,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:51:56,093 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2020-09-24 21:51:56,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:56,118 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-09-24 21:51:56,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:51:56,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-24 21:51:56,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:56,120 INFO L225 Difference]: With dead ends: 28 [2020-09-24 21:51:56,121 INFO L226 Difference]: Without dead ends: 23 [2020-09-24 21:51:56,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:51:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-24 21:51:56,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-24 21:51:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 21:51:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 21:51:56,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 21:51:56,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:56,129 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 21:51:56,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:51:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 21:51:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 21:51:56,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:56,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:56,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:51:56,131 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -588245929, now seen corresponding path program 1 times [2020-09-24 21:51:56,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:56,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894956807] [2020-09-24 21:51:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:56,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:56,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 21:51:56,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-09-24 21:51:56,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:51:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:51:56,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:51:56,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:56,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:56,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:56,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:56,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:56,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:56,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:56,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:56,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:56,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:56,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:56,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894956807] [2020-09-24 21:51:56,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:56,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:51:56,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092053951] [2020-09-24 21:51:56,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:51:56,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:51:56,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:51:56,745 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 9 states. [2020-09-24 21:51:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:56,934 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-24 21:51:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:51:56,935 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-24 21:51:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:56,936 INFO L225 Difference]: With dead ends: 35 [2020-09-24 21:51:56,936 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 21:51:56,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:51:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 21:51:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-24 21:51:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 21:51:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 21:51:56,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 21:51:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:56,950 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 21:51:56,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:51:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 21:51:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 21:51:56,952 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:56,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:56,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:51:56,954 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash -590441495, now seen corresponding path program 2 times [2020-09-24 21:51:56,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:56,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057959369] [2020-09-24 21:51:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:56,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:57,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:51:57,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:51:57,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 327 [2020-09-24 21:51:57,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 21:51:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:51:57,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 21:51:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:57,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:57,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:57,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:57,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:57,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:57,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:57,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:57,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:57,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:57,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:57,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057959369] [2020-09-24 21:51:57,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:57,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:51:57,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187560440] [2020-09-24 21:51:57,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:51:57,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:57,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:51:57,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:51:57,450 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 12 states. [2020-09-24 21:51:57,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:57,642 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-24 21:51:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 21:51:57,642 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-09-24 21:51:57,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:57,643 INFO L225 Difference]: With dead ends: 38 [2020-09-24 21:51:57,644 INFO L226 Difference]: Without dead ends: 33 [2020-09-24 21:51:57,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:51:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-24 21:51:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-24 21:51:57,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 21:51:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 21:51:57,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 21:51:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:57,651 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 21:51:57,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:51:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 21:51:57,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:51:57,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:57,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:57,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:51:57,653 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash -934609001, now seen corresponding path program 3 times [2020-09-24 21:51:57,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:57,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003145833] [2020-09-24 21:51:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:57,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:57,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:58,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:51:58,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 21:51:58,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-09-24 21:51:58,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:58,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:51:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:51:58,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:51:58,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:58,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:58,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:58,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:58,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:58,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:58,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:58,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:58,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:58,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003145833] [2020-09-24 21:51:58,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:58,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:51:58,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284334437] [2020-09-24 21:51:58,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:51:58,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:58,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:51:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:51:58,779 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 15 states. [2020-09-24 21:51:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:59,087 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-24 21:51:59,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:51:59,088 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-09-24 21:51:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:59,089 INFO L225 Difference]: With dead ends: 43 [2020-09-24 21:51:59,089 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 21:51:59,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:51:59,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 21:51:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-24 21:51:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 21:51:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 21:51:59,104 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 21:51:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:59,105 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 21:51:59,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:51:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 21:51:59,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:51:59,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:59,107 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:59,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:51:59,108 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1774497961, now seen corresponding path program 4 times [2020-09-24 21:51:59,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:59,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310072339] [2020-09-24 21:51:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:59,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:59,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:59,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 21:51:59,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:51:59,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-09-24 21:51:59,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 21:51:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:51:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 21:51:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:00,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:00,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:00,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:00,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:00,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:00,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:00,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310072339] [2020-09-24 21:52:00,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:00,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:52:00,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017251390] [2020-09-24 21:52:00,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:52:00,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:00,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:52:00,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:52:00,197 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 18 states. [2020-09-24 21:52:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:00,590 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-09-24 21:52:00,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:52:00,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-09-24 21:52:00,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:00,592 INFO L225 Difference]: With dead ends: 48 [2020-09-24 21:52:00,592 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 21:52:00,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:52:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 21:52:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-09-24 21:52:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 21:52:00,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 21:52:00,602 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 21:52:00,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:00,603 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 21:52:00,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:52:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 21:52:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:52:00,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:00,604 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:00,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:52:00,605 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:00,605 INFO L82 PathProgramCache]: Analyzing trace with hash -194454825, now seen corresponding path program 5 times [2020-09-24 21:52:00,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:00,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830410299] [2020-09-24 21:52:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:00,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:00,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:01,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:01,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:01,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:01,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 21:52:01,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:52:01,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-09-24 21:52:01,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:52:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:52:01,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 21:52:01,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:02,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:02,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:02,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:02,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:02,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:02,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:02,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:02,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:02,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:02,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:02,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830410299] [2020-09-24 21:52:02,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:02,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:52:02,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460652101] [2020-09-24 21:52:02,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:52:02,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:02,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:52:02,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:52:02,211 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 21 states. [2020-09-24 21:52:02,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:02,745 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-09-24 21:52:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 21:52:02,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-09-24 21:52:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:02,747 INFO L225 Difference]: With dead ends: 53 [2020-09-24 21:52:02,747 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 21:52:02,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 21:52:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 21:52:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-24 21:52:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 21:52:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-24 21:52:02,761 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-24 21:52:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:02,761 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-24 21:52:02,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:52:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-24 21:52:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:52:02,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:02,764 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:02,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:52:02,765 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:02,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1783487849, now seen corresponding path program 6 times [2020-09-24 21:52:02,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:02,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009220791] [2020-09-24 21:52:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:02,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:03,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:04,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:04,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:52:04,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:52:04,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1968 [2020-09-24 21:52:04,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-24 21:52:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:52:04,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-24 21:52:04,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:05,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:05,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:05,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:05,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:05,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009220791] [2020-09-24 21:52:05,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:05,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 21:52:05,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113168196] [2020-09-24 21:52:05,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 21:52:05,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:05,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 21:52:05,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:52:05,130 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-09-24 21:52:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:05,759 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-24 21:52:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 21:52:05,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-09-24 21:52:05,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:05,760 INFO L225 Difference]: With dead ends: 58 [2020-09-24 21:52:05,761 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 21:52:05,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=1357, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:52:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 21:52:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-09-24 21:52:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 21:52:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 21:52:05,769 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-24 21:52:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:05,770 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 21:52:05,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 21:52:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 21:52:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 21:52:05,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:05,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:05,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:52:05,771 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:05,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1046324759, now seen corresponding path program 7 times [2020-09-24 21:52:05,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:05,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362500865] [2020-09-24 21:52:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:08,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:52:08,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:52:08,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2257 [2020-09-24 21:52:08,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:08,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:52:08,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:52:08,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 21:52:08,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:08,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:08,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:08,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:08,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:08,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:08,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:08,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:08,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:08,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362500865] [2020-09-24 21:52:08,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:08,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 21:52:08,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087879502] [2020-09-24 21:52:08,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 21:52:08,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 21:52:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:52:08,491 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2020-09-24 21:52:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:09,293 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-24 21:52:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:52:09,294 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-09-24 21:52:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:09,295 INFO L225 Difference]: With dead ends: 63 [2020-09-24 21:52:09,295 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 21:52:09,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 21:52:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 21:52:09,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-24 21:52:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 21:52:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-24 21:52:09,309 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-24 21:52:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:09,309 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-24 21:52:09,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 21:52:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-24 21:52:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 21:52:09,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:09,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:09,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:52:09,311 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash 232135209, now seen corresponding path program 8 times [2020-09-24 21:52:09,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:09,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137270942] [2020-09-24 21:52:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:09,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:12,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 21:52:12,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:52:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3199 [2020-09-24 21:52:12,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:12,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-24 21:52:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:52:12,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 21:52:12,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:13,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:13,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:13,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:13,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:13,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:52:13,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:13,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:13,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:13,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137270942] [2020-09-24 21:52:13,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:13,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 21:52:13,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015030333] [2020-09-24 21:52:13,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 21:52:13,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:13,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 21:52:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2020-09-24 21:52:13,107 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 30 states. [2020-09-24 21:52:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:14,317 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-09-24 21:52:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-24 21:52:14,318 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 56 [2020-09-24 21:52:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:14,319 INFO L225 Difference]: With dead ends: 68 [2020-09-24 21:52:14,319 INFO L226 Difference]: Without dead ends: 63 [2020-09-24 21:52:14,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:52:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-24 21:52:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-09-24 21:52:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:52:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-24 21:52:14,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-24 21:52:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:14,329 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-24 21:52:14,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 21:52:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-24 21:52:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 21:52:14,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:14,330 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:14,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:52:14,331 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash 977101143, now seen corresponding path program 9 times [2020-09-24 21:52:14,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:14,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84667865] [2020-09-24 21:52:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:14,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:17,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 21:52:17,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:52:17,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3314 [2020-09-24 21:52:17,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:17,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 21:52:17,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:52:17,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 21:52:17,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:18,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:18,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:18,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:18,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:18,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:18,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:18,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:18,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:18,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:18,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:18,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84667865] [2020-09-24 21:52:18,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:18,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 21:52:18,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654520707] [2020-09-24 21:52:18,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 21:52:18,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 21:52:18,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:52:18,348 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 33 states. [2020-09-24 21:52:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:19,870 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-09-24 21:52:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 21:52:19,871 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 61 [2020-09-24 21:52:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:19,872 INFO L225 Difference]: With dead ends: 73 [2020-09-24 21:52:19,873 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 21:52:19,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=194, Invalid=2998, Unknown=0, NotChecked=0, Total=3192 [2020-09-24 21:52:19,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 21:52:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-24 21:52:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 21:52:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 21:52:19,880 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-24 21:52:19,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:19,881 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 21:52:19,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 21:52:19,881 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 21:52:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 21:52:19,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:19,882 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:19,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:52:19,883 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash 751396585, now seen corresponding path program 10 times [2020-09-24 21:52:19,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:19,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362076427] [2020-09-24 21:52:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:20,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:22,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:24,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:24,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:24,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:52:24,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:52:24,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:52:24,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 21:52:24,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:52:24,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-24 21:52:24,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:25,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:25,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:25,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:25,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:25,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:25,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:25,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:25,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:25,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:25,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:25,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:25,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362076427] [2020-09-24 21:52:25,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:25,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 21:52:25,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496040882] [2020-09-24 21:52:25,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 21:52:25,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 21:52:25,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:52:25,763 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 35 states. [2020-09-24 21:52:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:27,896 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-24 21:52:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 21:52:27,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-09-24 21:52:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:27,897 INFO L225 Difference]: With dead ends: 67 [2020-09-24 21:52:27,897 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 21:52:27,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=499, Invalid=4193, Unknown=0, NotChecked=0, Total=4692 [2020-09-24 21:52:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 21:52:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 21:52:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 21:52:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 21:52:27,900 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2020-09-24 21:52:27,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:27,901 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 21:52:27,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 21:52:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 21:52:27,901 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 21:52:27,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:52:27,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 21:52:28,178 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 21:52:28,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:52:28,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:52:28,179 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 21:52:28,179 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 21:52:28,179 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 21:52:28,179 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 21:52:28,179 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 21:52:28,180 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 21:52:28,180 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 21:52:28,180 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 21:52:28,180 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-09-24 21:52:28,181 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 21:52:28,181 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-24 21:52:28,181 INFO L268 CegarLoopResult]: For program point L17-1(line 17) no Hoare annotation was computed. [2020-09-24 21:52:28,181 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 21:52:28,181 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-09-24 21:52:28,181 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-09-24 21:52:28,182 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-24 21:52:28,182 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-24 21:52:28,182 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-09-24 21:52:28,182 INFO L268 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-09-24 21:52:28,182 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 21:52:28,184 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (let ((.cse4 (<= main_~x~0 (+ main_~y~0 16)))) (or (let ((.cse0 (+ main_~x~0 51))) (and (<= .cse0 main_~y~0) (<= main_~y~0 .cse0))) (let ((.cse1 (+ main_~x~0 50))) (and (<= 0 .cse1) (<= .cse1 0))) (let ((.cse3 (* 2 main_~y~0)) (.cse2 (+ main_~x~0 53))) (and (<= .cse2 .cse3) .cse4 (<= .cse3 .cse2))) (and (<= main_~x~0 17) (<= (+ main_~x~0 60) (* 4 main_~y~0))) (and .cse4 (<= (+ main_~x~0 4) (* 6 main_~y~0))) (let ((.cse6 (* 3 main_~y~0)) (.cse5 (+ main_~x~0 56))) (and .cse4 (<= .cse5 .cse6) (<= .cse6 .cse5))))) [2020-09-24 21:52:28,184 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 21:52:28,184 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (<= 11 main_~y~0) (<= (+ main_~x~0 95) (* 9 main_~y~0))) (and (<= main_~x~0 (+ main_~y~0 16)) (<= (+ main_~x~0 4) (* 6 main_~y~0)) (<= 1 main_~y~0))) [2020-09-24 21:52:28,184 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-24 21:52:28,184 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 21:52:28,184 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 21:52:28,185 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 21:52:28,185 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 21:52:28,185 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 21:52:28,185 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 21:52:28,185 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 21:52:28,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:52:28 BoogieIcfgContainer [2020-09-24 21:52:28,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:52:28,224 INFO L168 Benchmark]: Toolchain (without parser) took 33495.48 ms. Allocated memory was 141.0 MB in the beginning and 417.9 MB in the end (delta: 276.8 MB). Free memory was 104.5 MB in the beginning and 291.1 MB in the end (delta: -186.6 MB). Peak memory consumption was 90.2 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:28,227 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 21:52:28,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.65 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:28,229 INFO L168 Benchmark]: Boogie Preprocessor took 112.06 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.5 MB in the beginning and 183.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:28,230 INFO L168 Benchmark]: RCFGBuilder took 369.67 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 170.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:28,239 INFO L168 Benchmark]: TraceAbstraction took 32697.19 ms. Allocated memory was 204.5 MB in the beginning and 417.9 MB in the end (delta: 213.4 MB). Free memory was 170.0 MB in the beginning and 291.1 MB in the end (delta: -121.1 MB). Peak memory consumption was 92.3 MB. Max. memory is 7.1 GB. [2020-09-24 21:52:28,244 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.65 ms. Allocated memory is still 141.0 MB. Free memory was 103.8 MB in the beginning and 94.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.06 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 94.5 MB in the beginning and 183.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.67 ms. Allocated memory is still 204.5 MB. Free memory was 183.0 MB in the beginning and 170.0 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 32697.19 ms. Allocated memory was 204.5 MB in the beginning and 417.9 MB in the end (delta: 213.4 MB). Free memory was 170.0 MB in the beginning and 291.1 MB in the end (delta: -121.1 MB). Peak memory consumption was 92.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((((x + 51 <= y && y <= x + 51) || (0 <= x + 50 && x + 50 <= 0)) || ((x + 53 <= 2 * y && x <= y + 16) && 2 * y <= x + 53)) || (x <= 17 && x + 60 <= 4 * y)) || (x <= y + 16 && x + 4 <= 6 * y)) || ((x <= y + 16 && x + 56 <= 3 * y) && 3 * y <= x + 56) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 32.3s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 8.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 249 SDslu, 2142 SDs, 0 SdLazy, 5086 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=11, 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, 12 MinimizatonAttempts, 12 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 18 PreInvPairs, 38 NumberOfFragments, 120 HoareAnnotationTreeSize, 18 FomulaSimplifications, 89 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 170 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 23.6s InterpolantComputationTime, 467 NumberOfCodeBlocks, 467 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 455 ConstructedInterpolants, 0 QuantifiedInterpolants, 109615 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/880 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 correct! Received shutdown request...