/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:26:09,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:26:09,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:26:09,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:26:09,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:26:09,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:26:09,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:26:09,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:26:09,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:26:09,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:26:09,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:26:09,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:26:09,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:26:09,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:26:09,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:26:09,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:26:09,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:26:09,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:26:09,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:26:09,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:26:09,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:26:09,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:26:09,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:26:09,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:26:09,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:26:09,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:26:09,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:26:09,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:26:09,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:26:09,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:26:09,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:26:09,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:26:09,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:26:09,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:26:09,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:26:09,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:26:09,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:26:09,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:26:09,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:26:09,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:26:09,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:26:09,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:26:09,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:26:09,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:26:09,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:26:09,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:26:09,232 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:26:09,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:26:09,232 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:26:09,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:26:09,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:26:09,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:26:09,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:26:09,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:26:09,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:26:09,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:26:09,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:26:09,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:26:09,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:26:09,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:26:09,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:26:09,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:26:09,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:26:09,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:26:09,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:26:09,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:26:09,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:26:09,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:26:09,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:26:09,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:26:09,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:26:09,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:26:09,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:26:09,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:26:09,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:26:09,576 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:26:09,577 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:26:09,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:26:09,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89aac8584/b865a2eb3bb3464281c7a23717f8277c/FLAGcf68dc535 [2020-10-14 09:26:10,099 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:26:10,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:26:10,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89aac8584/b865a2eb3bb3464281c7a23717f8277c/FLAGcf68dc535 [2020-10-14 09:26:10,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89aac8584/b865a2eb3bb3464281c7a23717f8277c [2020-10-14 09:26:10,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:26:10,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:26:10,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:26:10,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:26:10,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:26:10,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:26:10" (1/1) ... [2020-10-14 09:26:10,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9890d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:10, skipping insertion in model container [2020-10-14 09:26:10,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:26:10" (1/1) ... [2020-10-14 09:26:10,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:26:10,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:26:10,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:26:10,942 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:26:11,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:26:11,061 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:26:11,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11 WrapperNode [2020-10-14 09:26:11,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:26:11,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:26:11,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:26:11,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:26:11,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... [2020-10-14 09:26:11,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:26:11,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:26:11,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:26:11,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:26:11,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:26:11,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:26:11,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:26:11,215 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:26:11,215 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:26:11,215 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:26:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:26:11,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:26:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:26:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:26:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:26:11,217 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:26:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:26:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:26:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:26:11,218 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:26:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:26:11,219 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:26:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:26:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:26:11,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:26:12,018 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:26:12,018 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:26:12,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:26:12 BoogieIcfgContainer [2020-10-14 09:26:12,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:26:12,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:26:12,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:26:12,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:26:12,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:26:10" (1/3) ... [2020-10-14 09:26:12,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df59e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:26:12, skipping insertion in model container [2020-10-14 09:26:12,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:26:11" (2/3) ... [2020-10-14 09:26:12,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df59e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:26:12, skipping insertion in model container [2020-10-14 09:26:12,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:26:12" (3/3) ... [2020-10-14 09:26:12,032 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 09:26:12,042 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:26:12,051 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:26:12,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:26:12,094 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:26:12,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:26:12,095 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:26:12,095 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:26:12,095 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:26:12,095 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:26:12,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:26:12,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:26:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-14 09:26:12,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 09:26:12,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:12,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:12,135 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-14 09:26:12,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:12,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979469636] [2020-10-14 09:26:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:12,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:13,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:14,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:14,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 09:26:14,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 09:26:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-14 09:26:14,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:14,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 09:26:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:26:14,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 09:26:14,837 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:14,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:14,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:14,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:14,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:14,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-14 09:26:14,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:14,867 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:14,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:14,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:14,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:14,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:14,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979469636] [2020-10-14 09:26:14,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:14,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:14,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313231585] [2020-10-14 09:26:14,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:14,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:14,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:14,927 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2020-10-14 09:26:15,175 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:26:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:15,917 INFO L93 Difference]: Finished difference Result 332 states and 558 transitions. [2020-10-14 09:26:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:15,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 09:26:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:15,935 INFO L225 Difference]: With dead ends: 332 [2020-10-14 09:26:15,935 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 09:26:15,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 09:26:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2020-10-14 09:26:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-14 09:26:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 361 transitions. [2020-10-14 09:26:16,012 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 361 transitions. Word has length 66 [2020-10-14 09:26:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:16,012 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 361 transitions. [2020-10-14 09:26:16,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 361 transitions. [2020-10-14 09:26:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 09:26:16,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:16,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:16,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:26:16,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:16,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1367795633, now seen corresponding path program 1 times [2020-10-14 09:26:16,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:16,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025751625] [2020-10-14 09:26:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:16,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:16,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:19,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:19,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 09:26:19,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 09:26:19,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3805 [2020-10-14 09:26:19,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:19,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:19,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:19,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 09:26:19,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 09:26:19,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:20,091 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:20,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:20,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:20,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:20,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:26:20,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:20,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:20,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:20,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:20,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025751625] [2020-10-14 09:26:20,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:20,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:20,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347918878] [2020-10-14 09:26:20,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:20,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:20,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:20,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:20,126 INFO L87 Difference]: Start difference. First operand 229 states and 361 transitions. Second operand 4 states. [2020-10-14 09:26:20,316 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:26:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:20,944 INFO L93 Difference]: Finished difference Result 549 states and 897 transitions. [2020-10-14 09:26:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:20,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-14 09:26:20,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:20,949 INFO L225 Difference]: With dead ends: 549 [2020-10-14 09:26:20,949 INFO L226 Difference]: Without dead ends: 381 [2020-10-14 09:26:20,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-14 09:26:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 379. [2020-10-14 09:26:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-14 09:26:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 612 transitions. [2020-10-14 09:26:20,981 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 612 transitions. Word has length 68 [2020-10-14 09:26:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:20,981 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 612 transitions. [2020-10-14 09:26:20,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:20,982 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 612 transitions. [2020-10-14 09:26:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 09:26:20,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:20,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:20,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:26:20,985 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash -172135024, now seen corresponding path program 1 times [2020-10-14 09:26:20,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:20,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62935426] [2020-10-14 09:26:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:21,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:21,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:21,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:21,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:22,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:22,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:26,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:26,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 09:26:26,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:26:26,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:26:26,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:26,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:26,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 09:26:26,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 09:26:26,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:26,248 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:26,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:26,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:26,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:26,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:26,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:26:26,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:26,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:26,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:26,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:26,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:26,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:26,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62935426] [2020-10-14 09:26:26,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:26,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:26,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563707963] [2020-10-14 09:26:26,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:26,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:26,288 INFO L87 Difference]: Start difference. First operand 379 states and 612 transitions. Second operand 4 states. [2020-10-14 09:26:26,483 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-14 09:26:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:27,127 INFO L93 Difference]: Finished difference Result 927 states and 1526 transitions. [2020-10-14 09:26:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:27,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 09:26:27,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:27,135 INFO L225 Difference]: With dead ends: 927 [2020-10-14 09:26:27,135 INFO L226 Difference]: Without dead ends: 609 [2020-10-14 09:26:27,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2020-10-14 09:26:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 607. [2020-10-14 09:26:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-10-14 09:26:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 972 transitions. [2020-10-14 09:26:27,170 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 972 transitions. Word has length 70 [2020-10-14 09:26:27,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:27,171 INFO L479 AbstractCegarLoop]: Abstraction has 607 states and 972 transitions. [2020-10-14 09:26:27,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:27,171 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 972 transitions. [2020-10-14 09:26:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 09:26:27,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:27,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:27,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:26:27,176 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash 575795729, now seen corresponding path program 1 times [2020-10-14 09:26:27,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:27,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400489046] [2020-10-14 09:26:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:27,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:27,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:27,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:27,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:27,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:30,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:32,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:32,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 09:26:32,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:26:32,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:32,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 09:26:32,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:32,578 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:32,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:32,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:32,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:32,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:32,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:32,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:26:32,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:32,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:32,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:32,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:32,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400489046] [2020-10-14 09:26:32,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:32,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:32,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882804222] [2020-10-14 09:26:32,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:32,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:32,621 INFO L87 Difference]: Start difference. First operand 607 states and 972 transitions. Second operand 5 states. [2020-10-14 09:26:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:33,581 INFO L93 Difference]: Finished difference Result 1706 states and 2751 transitions. [2020-10-14 09:26:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:33,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-14 09:26:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:33,589 INFO L225 Difference]: With dead ends: 1706 [2020-10-14 09:26:33,590 INFO L226 Difference]: Without dead ends: 1160 [2020-10-14 09:26:33,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-10-14 09:26:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1158. [2020-10-14 09:26:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1158 states. [2020-10-14 09:26:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1845 transitions. [2020-10-14 09:26:33,687 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1845 transitions. Word has length 72 [2020-10-14 09:26:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:33,688 INFO L479 AbstractCegarLoop]: Abstraction has 1158 states and 1845 transitions. [2020-10-14 09:26:33,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1845 transitions. [2020-10-14 09:26:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:26:33,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:33,695 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:33,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:26:33,695 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1092508768, now seen corresponding path program 1 times [2020-10-14 09:26:33,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:33,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837154174] [2020-10-14 09:26:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:33,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:33,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:33,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:34,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:34,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:34,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:37,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:38,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:26:38,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 09:26:38,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:38,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 09:26:38,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 09:26:38,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:38,923 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:38,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:38,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:38,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:38,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:38,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:26:38,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:38,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:38,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:38,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:38,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:38,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:38,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837154174] [2020-10-14 09:26:38,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:38,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:38,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212890100] [2020-10-14 09:26:38,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:38,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:38,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:38,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:38,956 INFO L87 Difference]: Start difference. First operand 1158 states and 1845 transitions. Second operand 4 states. [2020-10-14 09:26:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:39,756 INFO L93 Difference]: Finished difference Result 2688 states and 4345 transitions. [2020-10-14 09:26:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:39,757 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:26:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:39,767 INFO L225 Difference]: With dead ends: 2688 [2020-10-14 09:26:39,767 INFO L226 Difference]: Without dead ends: 1642 [2020-10-14 09:26:39,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-10-14 09:26:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1600. [2020-10-14 09:26:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1600 states. [2020-10-14 09:26:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2547 transitions. [2020-10-14 09:26:39,887 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2547 transitions. Word has length 73 [2020-10-14 09:26:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:39,888 INFO L479 AbstractCegarLoop]: Abstraction has 1600 states and 2547 transitions. [2020-10-14 09:26:39,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2547 transitions. [2020-10-14 09:26:39,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:26:39,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:39,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:39,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:26:39,893 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:39,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash 572101172, now seen corresponding path program 1 times [2020-10-14 09:26:39,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:39,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390104265] [2020-10-14 09:26:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:39,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:40,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:41,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:44,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:44,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:26:44,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:44,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 09:26:44,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:44,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:44,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:44,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 09:26:44,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 09:26:44,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:45,144 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:45,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:45,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:45,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:45,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:45,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:45,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:26:45,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:45,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:45,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:45,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:45,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:45,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:45,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390104265] [2020-10-14 09:26:45,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:45,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:45,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817347362] [2020-10-14 09:26:45,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:45,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:45,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:45,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:45,177 INFO L87 Difference]: Start difference. First operand 1600 states and 2547 transitions. Second operand 4 states. [2020-10-14 09:26:45,388 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:26:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:46,146 INFO L93 Difference]: Finished difference Result 3156 states and 5075 transitions. [2020-10-14 09:26:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:46,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:26:46,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:46,160 INFO L225 Difference]: With dead ends: 3156 [2020-10-14 09:26:46,160 INFO L226 Difference]: Without dead ends: 2158 [2020-10-14 09:26:46,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2020-10-14 09:26:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 2156. [2020-10-14 09:26:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2156 states. [2020-10-14 09:26:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3433 transitions. [2020-10-14 09:26:46,328 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3433 transitions. Word has length 73 [2020-10-14 09:26:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:46,328 INFO L479 AbstractCegarLoop]: Abstraction has 2156 states and 3433 transitions. [2020-10-14 09:26:46,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3433 transitions. [2020-10-14 09:26:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 09:26:46,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:46,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:46,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:26:46,332 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash 853067612, now seen corresponding path program 1 times [2020-10-14 09:26:46,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:46,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387232180] [2020-10-14 09:26:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:46,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:46,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:46,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:46,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:47,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:47,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:51,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:51,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 09:26:51,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:26:51,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:26:51,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:51,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:51,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:26:51,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:26:51,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:26:51,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:51,559 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:51,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:51,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:51,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:51,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:26:51,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:51,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:51,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:51,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:26:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:51,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387232180] [2020-10-14 09:26:51,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:51,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:26:51,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190762723] [2020-10-14 09:26:51,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:26:51,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:51,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:26:51,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:51,589 INFO L87 Difference]: Start difference. First operand 2156 states and 3433 transitions. Second operand 4 states. [2020-10-14 09:26:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:52,491 INFO L93 Difference]: Finished difference Result 6378 states and 10149 transitions. [2020-10-14 09:26:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:26:52,493 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 09:26:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:52,515 INFO L225 Difference]: With dead ends: 6378 [2020-10-14 09:26:52,515 INFO L226 Difference]: Without dead ends: 4270 [2020-10-14 09:26:52,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:26:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2020-10-14 09:26:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 2162. [2020-10-14 09:26:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2162 states. [2020-10-14 09:26:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 3441 transitions. [2020-10-14 09:26:52,681 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 3441 transitions. Word has length 73 [2020-10-14 09:26:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:52,681 INFO L479 AbstractCegarLoop]: Abstraction has 2162 states and 3441 transitions. [2020-10-14 09:26:52,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:26:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 3441 transitions. [2020-10-14 09:26:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 09:26:52,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:52,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:52,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:26:52,684 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash 341002258, now seen corresponding path program 1 times [2020-10-14 09:26:52,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:52,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38986610] [2020-10-14 09:26:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:52,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:52,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:57,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:26:57,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 09:26:57,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:57,943 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:26:57,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:26:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:57,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:57,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:26:57,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:26:57,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:26:57,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:26:57,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:26:57,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:26:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:26:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:26:57,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:26:57,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:26:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:26:57,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38986610] [2020-10-14 09:26:57,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:26:57,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:26:57,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451098019] [2020-10-14 09:26:57,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:26:57,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:26:57,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:26:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:26:57,973 INFO L87 Difference]: Start difference. First operand 2162 states and 3441 transitions. Second operand 5 states. [2020-10-14 09:26:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:26:58,935 INFO L93 Difference]: Finished difference Result 6250 states and 9941 transitions. [2020-10-14 09:26:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:26:58,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 09:26:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:26:58,958 INFO L225 Difference]: With dead ends: 6250 [2020-10-14 09:26:58,958 INFO L226 Difference]: Without dead ends: 4113 [2020-10-14 09:26:58,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:26:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2020-10-14 09:26:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 4111. [2020-10-14 09:26:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4111 states. [2020-10-14 09:26:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 6491 transitions. [2020-10-14 09:26:59,251 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 6491 transitions. Word has length 74 [2020-10-14 09:26:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:26:59,251 INFO L479 AbstractCegarLoop]: Abstraction has 4111 states and 6491 transitions. [2020-10-14 09:26:59,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:26:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 6491 transitions. [2020-10-14 09:26:59,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:26:59,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:26:59,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:26:59,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:26:59,255 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:26:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:26:59,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2041410011, now seen corresponding path program 1 times [2020-10-14 09:26:59,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:26:59,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645247331] [2020-10-14 09:26:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:26:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:26:59,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:59,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:26:59,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:00,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:03,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:04,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:04,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:27:04,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:27:04,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:27:04,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:04,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:04,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:27:04,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:27:04,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:27:04,481 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:04,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:04,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:04,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:04,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:04,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:04,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:04,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:04,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:04,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:04,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:04,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:04,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:04,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645247331] [2020-10-14 09:27:04,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:04,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:04,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436415755] [2020-10-14 09:27:04,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:04,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:04,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:04,507 INFO L87 Difference]: Start difference. First operand 4111 states and 6491 transitions. Second operand 4 states. [2020-10-14 09:27:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:05,385 INFO L93 Difference]: Finished difference Result 12046 states and 19061 transitions. [2020-10-14 09:27:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:05,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:27:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:05,419 INFO L225 Difference]: With dead ends: 12046 [2020-10-14 09:27:05,420 INFO L226 Difference]: Without dead ends: 8189 [2020-10-14 09:27:05,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8189 states. [2020-10-14 09:27:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8189 to 4117. [2020-10-14 09:27:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4117 states. [2020-10-14 09:27:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4117 states to 4117 states and 6499 transitions. [2020-10-14 09:27:05,759 INFO L78 Accepts]: Start accepts. Automaton has 4117 states and 6499 transitions. Word has length 75 [2020-10-14 09:27:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:05,759 INFO L479 AbstractCegarLoop]: Abstraction has 4117 states and 6499 transitions. [2020-10-14 09:27:05,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 4117 states and 6499 transitions. [2020-10-14 09:27:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:27:05,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:05,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:05,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:27:05,762 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:05,763 INFO L82 PathProgramCache]: Analyzing trace with hash 337837947, now seen corresponding path program 1 times [2020-10-14 09:27:05,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:05,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57742832] [2020-10-14 09:27:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:05,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:05,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:06,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:10,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:10,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:27:10,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:10,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 09:27:10,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:10,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 09:27:10,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 09:27:10,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:10,983 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:10,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:10,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:10,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:10,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:11,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57742832] [2020-10-14 09:27:11,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:11,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:11,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67083565] [2020-10-14 09:27:11,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:11,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:11,004 INFO L87 Difference]: Start difference. First operand 4117 states and 6499 transitions. Second operand 4 states. [2020-10-14 09:27:11,191 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:27:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:12,089 INFO L93 Difference]: Finished difference Result 7353 states and 11717 transitions. [2020-10-14 09:27:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:12,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:27:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:12,111 INFO L225 Difference]: With dead ends: 7353 [2020-10-14 09:27:12,111 INFO L226 Difference]: Without dead ends: 5355 [2020-10-14 09:27:12,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5355 states. [2020-10-14 09:27:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5355 to 5353. [2020-10-14 09:27:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5353 states. [2020-10-14 09:27:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 8455 transitions. [2020-10-14 09:27:12,466 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 8455 transitions. Word has length 75 [2020-10-14 09:27:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:12,466 INFO L479 AbstractCegarLoop]: Abstraction has 5353 states and 8455 transitions. [2020-10-14 09:27:12,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 8455 transitions. [2020-10-14 09:27:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 09:27:12,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:12,469 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:12,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:27:12,470 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:12,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:12,470 INFO L82 PathProgramCache]: Analyzing trace with hash -328601019, now seen corresponding path program 1 times [2020-10-14 09:27:12,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:12,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377717001] [2020-10-14 09:27:12,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:12,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:12,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:13,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:15,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:17,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 09:27:17,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:17,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:27:17,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:17,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:17,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:17,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 09:27:17,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 09:27:17,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:17,695 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:17,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:17,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:17,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:17,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:17,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:17,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:17,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:17,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:17,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:17,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377717001] [2020-10-14 09:27:17,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:17,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:17,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500486910] [2020-10-14 09:27:17,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:17,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:17,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:17,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:17,718 INFO L87 Difference]: Start difference. First operand 5353 states and 8455 transitions. Second operand 4 states. [2020-10-14 09:27:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:18,640 INFO L93 Difference]: Finished difference Result 11953 states and 19037 transitions. [2020-10-14 09:27:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:18,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-14 09:27:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:18,660 INFO L225 Difference]: With dead ends: 11953 [2020-10-14 09:27:18,660 INFO L226 Difference]: Without dead ends: 6987 [2020-10-14 09:27:18,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2020-10-14 09:27:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6841. [2020-10-14 09:27:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6841 states. [2020-10-14 09:27:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6841 states to 6841 states and 10763 transitions. [2020-10-14 09:27:19,088 INFO L78 Accepts]: Start accepts. Automaton has 6841 states and 10763 transitions. Word has length 75 [2020-10-14 09:27:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:19,088 INFO L479 AbstractCegarLoop]: Abstraction has 6841 states and 10763 transitions. [2020-10-14 09:27:19,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6841 states and 10763 transitions. [2020-10-14 09:27:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:27:19,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:19,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:19,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:27:19,091 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:19,091 INFO L82 PathProgramCache]: Analyzing trace with hash 814109049, now seen corresponding path program 1 times [2020-10-14 09:27:19,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:19,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084106389] [2020-10-14 09:27:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:19,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:19,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:21,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:24,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:24,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:27:24,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 09:27:24,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 09:27:24,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:24,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:24,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 09:27:24,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 09:27:24,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:27:24,318 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:24,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:24,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:24,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:24,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:24,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:24,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:24,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:24,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:24,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:24,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:24,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084106389] [2020-10-14 09:27:24,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:24,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:24,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222396794] [2020-10-14 09:27:24,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:24,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:24,343 INFO L87 Difference]: Start difference. First operand 6841 states and 10763 transitions. Second operand 4 states. [2020-10-14 09:27:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:25,909 INFO L93 Difference]: Finished difference Result 19566 states and 30893 transitions. [2020-10-14 09:27:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:27:25,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2020-10-14 09:27:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:25,941 INFO L225 Difference]: With dead ends: 19566 [2020-10-14 09:27:25,941 INFO L226 Difference]: Without dead ends: 13120 [2020-10-14 09:27:25,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13120 states. [2020-10-14 09:27:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13120 to 13118. [2020-10-14 09:27:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13118 states. [2020-10-14 09:27:26,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13118 states to 13118 states and 20561 transitions. [2020-10-14 09:27:26,638 INFO L78 Accepts]: Start accepts. Automaton has 13118 states and 20561 transitions. Word has length 76 [2020-10-14 09:27:26,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:26,638 INFO L479 AbstractCegarLoop]: Abstraction has 13118 states and 20561 transitions. [2020-10-14 09:27:26,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 13118 states and 20561 transitions. [2020-10-14 09:27:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:27:26,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:26,641 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:26,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:27:26,642 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:26,642 INFO L82 PathProgramCache]: Analyzing trace with hash -314466218, now seen corresponding path program 1 times [2020-10-14 09:27:26,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:26,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613440871] [2020-10-14 09:27:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:26,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:26,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:27,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:29,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:31,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:31,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:27:31,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 09:27:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 09:27:31,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:31,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:31,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:27:31,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:27:31,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 09:27:31,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:31,892 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:31,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:31,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:31,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:31,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:31,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:31,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:31,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:31,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:31,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:31,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:31,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613440871] [2020-10-14 09:27:31,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:31,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:27:31,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737505406] [2020-10-14 09:27:31,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:27:31,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:31,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:27:31,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:31,919 INFO L87 Difference]: Start difference. First operand 13118 states and 20561 transitions. Second operand 5 states. [2020-10-14 09:27:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:34,008 INFO L93 Difference]: Finished difference Result 36592 states and 57437 transitions. [2020-10-14 09:27:34,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:34,009 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:27:34,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:34,075 INFO L225 Difference]: With dead ends: 36592 [2020-10-14 09:27:34,075 INFO L226 Difference]: Without dead ends: 23756 [2020-10-14 09:27:34,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:27:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23756 states. [2020-10-14 09:27:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23756 to 23754. [2020-10-14 09:27:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23754 states. [2020-10-14 09:27:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23754 states to 23754 states and 36910 transitions. [2020-10-14 09:27:35,505 INFO L78 Accepts]: Start accepts. Automaton has 23754 states and 36910 transitions. Word has length 76 [2020-10-14 09:27:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:35,506 INFO L479 AbstractCegarLoop]: Abstraction has 23754 states and 36910 transitions. [2020-10-14 09:27:35,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:27:35,506 INFO L276 IsEmpty]: Start isEmpty. Operand 23754 states and 36910 transitions. [2020-10-14 09:27:35,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 09:27:35,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:35,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:35,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:27:35,511 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2023903507, now seen corresponding path program 1 times [2020-10-14 09:27:35,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:35,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186561471] [2020-10-14 09:27:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:35,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:35,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:35,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:35,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:35,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:35,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:40,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:40,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 09:27:40,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:27:40,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:27:40,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:40,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:40,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:27:40,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:27:40,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 09:27:40,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:40,788 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:40,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:40,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:40,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:40,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:40,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:40,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:27:40,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:40,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:40,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:40,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:40,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:40,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:40,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186561471] [2020-10-14 09:27:40,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:40,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:27:40,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632673084] [2020-10-14 09:27:40,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:27:40,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:40,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:27:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:40,816 INFO L87 Difference]: Start difference. First operand 23754 states and 36910 transitions. Second operand 5 states. [2020-10-14 09:27:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:43,151 INFO L93 Difference]: Finished difference Result 49034 states and 76355 transitions. [2020-10-14 09:27:43,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:43,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 76 [2020-10-14 09:27:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:43,201 INFO L225 Difference]: With dead ends: 49034 [2020-10-14 09:27:43,202 INFO L226 Difference]: Without dead ends: 26015 [2020-10-14 09:27:43,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:27:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26015 states. [2020-10-14 09:27:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26015 to 24173. [2020-10-14 09:27:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24173 states. [2020-10-14 09:27:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24173 states to 24173 states and 37438 transitions. [2020-10-14 09:27:44,799 INFO L78 Accepts]: Start accepts. Automaton has 24173 states and 37438 transitions. Word has length 76 [2020-10-14 09:27:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:44,800 INFO L479 AbstractCegarLoop]: Abstraction has 24173 states and 37438 transitions. [2020-10-14 09:27:44,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:27:44,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24173 states and 37438 transitions. [2020-10-14 09:27:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:27:44,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:44,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:44,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 09:27:44,805 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:44,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:44,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1036526146, now seen corresponding path program 1 times [2020-10-14 09:27:44,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:44,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718654306] [2020-10-14 09:27:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:44,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:44,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:44,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:48,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:49,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:49,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:27:49,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:27:49,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 09:27:49,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:49,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:27:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 09:27:49,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 09:27:49,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:50,037 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:27:50,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:27:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:50,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:50,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:27:50,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:27:50,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:27:50,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:27:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:27:50,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718654306] [2020-10-14 09:27:50,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:27:50,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:27:50,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211880803] [2020-10-14 09:27:50,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:27:50,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:27:50,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:27:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:27:50,064 INFO L87 Difference]: Start difference. First operand 24173 states and 37438 transitions. Second operand 4 states. [2020-10-14 09:27:50,280 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:27:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:27:53,182 INFO L93 Difference]: Finished difference Result 55925 states and 87752 transitions. [2020-10-14 09:27:53,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:27:53,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:27:53,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:27:53,227 INFO L225 Difference]: With dead ends: 55925 [2020-10-14 09:27:53,227 INFO L226 Difference]: Without dead ends: 32907 [2020-10-14 09:27:53,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:27:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32907 states. [2020-10-14 09:27:56,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32907 to 32905. [2020-10-14 09:27:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32905 states. [2020-10-14 09:27:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32905 states to 32905 states and 51494 transitions. [2020-10-14 09:27:56,418 INFO L78 Accepts]: Start accepts. Automaton has 32905 states and 51494 transitions. Word has length 77 [2020-10-14 09:27:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:27:56,418 INFO L479 AbstractCegarLoop]: Abstraction has 32905 states and 51494 transitions. [2020-10-14 09:27:56,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:27:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 32905 states and 51494 transitions. [2020-10-14 09:27:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:27:56,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:27:56,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:27:56,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 09:27:56,421 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:27:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:27:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2106237914, now seen corresponding path program 1 times [2020-10-14 09:27:56,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:27:56,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857191114] [2020-10-14 09:27:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:27:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:27:56,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:56,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:56,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:56,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:56,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:27:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:01,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:01,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:28:01,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:28:01,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:28:01,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:01,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:28:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 09:28:01,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 09:28:01,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:01,633 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:28:01,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:01,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:01,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:01,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:01,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:01,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:28:01,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:01,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:01,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:01,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:01,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:01,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:01,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857191114] [2020-10-14 09:28:01,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:01,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:28:01,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426450652] [2020-10-14 09:28:01,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:28:01,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:01,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:28:01,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:28:01,657 INFO L87 Difference]: Start difference. First operand 32905 states and 51494 transitions. Second operand 4 states. [2020-10-14 09:28:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:04,982 INFO L93 Difference]: Finished difference Result 75925 states and 118624 transitions. [2020-10-14 09:28:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:28:04,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:28:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:05,045 INFO L225 Difference]: With dead ends: 75925 [2020-10-14 09:28:05,046 INFO L226 Difference]: Without dead ends: 43895 [2020-10-14 09:28:05,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:28:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43895 states. [2020-10-14 09:28:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43895 to 42805. [2020-10-14 09:28:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42805 states. [2020-10-14 09:28:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42805 states to 42805 states and 65998 transitions. [2020-10-14 09:28:07,988 INFO L78 Accepts]: Start accepts. Automaton has 42805 states and 65998 transitions. Word has length 77 [2020-10-14 09:28:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:07,989 INFO L479 AbstractCegarLoop]: Abstraction has 42805 states and 65998 transitions. [2020-10-14 09:28:07,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:28:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 42805 states and 65998 transitions. [2020-10-14 09:28:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 09:28:07,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:07,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:07,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 09:28:07,993 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2119892646, now seen corresponding path program 1 times [2020-10-14 09:28:07,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:07,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560243361] [2020-10-14 09:28:07,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:08,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:08,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:08,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:08,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:08,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:12,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:13,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:13,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 09:28:13,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:28:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 09:28:13,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:13,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:28:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:28:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:28:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:13,194 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:28:13,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:13,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:13,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:13,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:13,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:13,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560243361] [2020-10-14 09:28:13,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:13,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:28:13,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802980571] [2020-10-14 09:28:13,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:28:13,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:28:13,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:28:13,217 INFO L87 Difference]: Start difference. First operand 42805 states and 65998 transitions. Second operand 4 states. [2020-10-14 09:28:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:19,763 INFO L93 Difference]: Finished difference Result 127999 states and 197479 transitions. [2020-10-14 09:28:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:28:19,763 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 77 [2020-10-14 09:28:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:19,897 INFO L225 Difference]: With dead ends: 127999 [2020-10-14 09:28:19,898 INFO L226 Difference]: Without dead ends: 85577 [2020-10-14 09:28:19,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:28:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85577 states. [2020-10-14 09:28:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85577 to 42808. [2020-10-14 09:28:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42808 states. [2020-10-14 09:28:24,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42808 states to 42808 states and 66002 transitions. [2020-10-14 09:28:24,956 INFO L78 Accepts]: Start accepts. Automaton has 42808 states and 66002 transitions. Word has length 77 [2020-10-14 09:28:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:24,957 INFO L479 AbstractCegarLoop]: Abstraction has 42808 states and 66002 transitions. [2020-10-14 09:28:24,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:28:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 42808 states and 66002 transitions. [2020-10-14 09:28:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 09:28:24,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:24,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:24,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 09:28:24,960 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1524245228, now seen corresponding path program 1 times [2020-10-14 09:28:24,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:24,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45541355] [2020-10-14 09:28:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:24,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:25,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:29,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:29,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 09:28:29,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:28:29,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 09:28:29,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:29,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:29,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 09:28:29,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:28:29,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 09:28:29,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:30,208 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:28:30,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:28:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:28:30,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:28:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:28:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:28:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:28:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:28:30,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45541355] [2020-10-14 09:28:30,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:28:30,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 09:28:30,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572971599] [2020-10-14 09:28:30,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 09:28:30,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:28:30,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 09:28:30,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:28:30,230 INFO L87 Difference]: Start difference. First operand 42808 states and 66002 transitions. Second operand 6 states. [2020-10-14 09:28:30,458 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-14 09:28:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:28:45,975 INFO L93 Difference]: Finished difference Result 254116 states and 396058 transitions. [2020-10-14 09:28:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 09:28:45,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-14 09:28:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:28:46,319 INFO L225 Difference]: With dead ends: 254116 [2020-10-14 09:28:46,320 INFO L226 Difference]: Without dead ends: 212466 [2020-10-14 09:28:46,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 09:28:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212466 states. [2020-10-14 09:28:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212466 to 82536. [2020-10-14 09:28:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82536 states. [2020-10-14 09:28:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82536 states to 82536 states and 126762 transitions. [2020-10-14 09:28:55,344 INFO L78 Accepts]: Start accepts. Automaton has 82536 states and 126762 transitions. Word has length 78 [2020-10-14 09:28:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:28:55,344 INFO L479 AbstractCegarLoop]: Abstraction has 82536 states and 126762 transitions. [2020-10-14 09:28:55,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 09:28:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 82536 states and 126762 transitions. [2020-10-14 09:28:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 09:28:55,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:28:55,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:28:55,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 09:28:55,348 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:28:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:28:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash -68572262, now seen corresponding path program 1 times [2020-10-14 09:28:55,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:28:55,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299144501] [2020-10-14 09:28:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:28:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:28:55,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:55,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:55,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:55,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:28:55,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:00,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:29:00,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 09:29:00,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:29:00,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:29:00,576 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:29:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:29:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:00,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:29:00,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:29:00,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:29:00,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:29:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:29:00,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299144501] [2020-10-14 09:29:00,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:29:00,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:29:00,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373584119] [2020-10-14 09:29:00,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:29:00,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:29:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:29:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:29:00,599 INFO L87 Difference]: Start difference. First operand 82536 states and 126762 transitions. Second operand 5 states. [2020-10-14 09:29:00,813 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-14 09:29:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:29:20,799 INFO L93 Difference]: Finished difference Result 320894 states and 494109 transitions. [2020-10-14 09:29:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:29:20,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-14 09:29:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:29:21,191 INFO L225 Difference]: With dead ends: 320894 [2020-10-14 09:29:21,191 INFO L226 Difference]: Without dead ends: 239516 [2020-10-14 09:29:21,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 09:29:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239516 states. [2020-10-14 09:29:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239516 to 160560. [2020-10-14 09:29:38,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160560 states. [2020-10-14 09:29:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160560 states to 160560 states and 244970 transitions. [2020-10-14 09:29:38,592 INFO L78 Accepts]: Start accepts. Automaton has 160560 states and 244970 transitions. Word has length 79 [2020-10-14 09:29:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:29:38,592 INFO L479 AbstractCegarLoop]: Abstraction has 160560 states and 244970 transitions. [2020-10-14 09:29:38,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:29:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 160560 states and 244970 transitions. [2020-10-14 09:29:38,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 09:29:38,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:29:38,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:29:38,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 09:29:38,595 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:29:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:29:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2112174747, now seen corresponding path program 1 times [2020-10-14 09:29:38,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:29:38,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175908739] [2020-10-14 09:29:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:29:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:38,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:38,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:38,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:38,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:43,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 09:29:43,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 09:29:43,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:29:43,824 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-14 09:29:43,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:29:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:29:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:29:43,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:29:43,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:29:43,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:29:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:29:43,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175908739] [2020-10-14 09:29:43,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:29:43,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:29:43,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414229381] [2020-10-14 09:29:43,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:29:43,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:29:43,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:29:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:29:43,849 INFO L87 Difference]: Start difference. First operand 160560 states and 244970 transitions. Second operand 5 states. [2020-10-14 09:29:44,068 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 170