/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:00:13,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:00:13,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:00:13,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:00:13,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:00:13,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:00:13,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:00:13,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:00:13,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:00:13,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:00:13,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:00:13,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:00:13,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:00:13,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:00:13,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:00:13,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:00:13,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:00:13,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:00:13,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:00:13,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:00:13,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:00:13,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:00:13,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:00:13,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:00:13,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:00:13,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:00:13,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:00:13,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:00:13,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:00:13,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:00:13,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:00:13,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:00:13,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:00:13,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:00:13,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:00:13,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:00:13,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:00:13,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:00:13,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:00:13,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:00:13,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:00:13,220 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 [2020-10-28 19:00:13,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:00:13,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:00:13,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:00:13,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:00:13,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:00:13,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:00:13,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:00:13,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:00:13,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:00:13,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:00:13,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:00:13,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:00:13,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:00:13,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:00:13,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:00:13,278 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:00:13,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:00:13,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:00:13,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:00:13,279 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:00:13,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:00:13,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:00:13,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:00:13,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:00:13,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:00:13,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:00:13,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:00:13,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:00:13,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:00:13,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:00:13,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:00:13,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:00:13,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:00:13,717 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:00:13,718 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:00:13,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 19:00:13,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147ff65f6/03ad31c0024c4be2bcf8612f6e2098cf/FLAG5c5cdc487 [2020-10-28 19:00:14,692 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:00:14,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 19:00:14,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147ff65f6/03ad31c0024c4be2bcf8612f6e2098cf/FLAG5c5cdc487 [2020-10-28 19:00:14,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/147ff65f6/03ad31c0024c4be2bcf8612f6e2098cf [2020-10-28 19:00:14,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:00:14,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:00:14,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:00:14,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:00:14,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:00:14,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:00:14" (1/1) ... [2020-10-28 19:00:14,776 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673a8e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:14, skipping insertion in model container [2020-10-28 19:00:14,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:00:14" (1/1) ... [2020-10-28 19:00:14,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:00:14,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:00:16,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:00:16,222 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:00:16,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:00:16,854 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:00:16,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16 WrapperNode [2020-10-28 19:00:16,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:00:16,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:00:16,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:00:16,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:00:16,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:16,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:16,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:16,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:17,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:17,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:17,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (1/1) ... [2020-10-28 19:00:17,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:00:17,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:00:17,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:00:17,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:00:17,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (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 [2020-10-28 19:00:17,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:00:17,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:00:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:00:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:00:17,229 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:00:17,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:00:17,229 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:00:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:00:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:00:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:00:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:00:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:00:17,230 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:00:17,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:00:17,231 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:00:17,231 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:00:17,231 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:00:17,231 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:00:17,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:00:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:00:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:00:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:00:17,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:00:22,870 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:00:22,870 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:00:22,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:00:22 BoogieIcfgContainer [2020-10-28 19:00:22,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:00:22,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:00:22,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:00:22,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:00:22,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:00:14" (1/3) ... [2020-10-28 19:00:22,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c299ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:00:22, skipping insertion in model container [2020-10-28 19:00:22,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:00:16" (2/3) ... [2020-10-28 19:00:22,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c299ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:00:22, skipping insertion in model container [2020-10-28 19:00:22,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:00:22" (3/3) ... [2020-10-28 19:00:22,890 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 19:00:22,902 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:00:22,909 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:00:22,922 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:00:22,972 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:00:22,972 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:00:22,973 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:00:22,973 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:00:22,973 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:00:22,973 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:00:22,973 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:00:22,973 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:00:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states. [2020-10-28 19:00:23,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 19:00:23,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:23,084 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] [2020-10-28 19:00:23,084 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1330537411, now seen corresponding path program 1 times [2020-10-28 19:00:23,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:23,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400448705] [2020-10-28 19:00:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:23,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:24,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:24,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:24,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:28,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:28,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 19:00:28,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:28,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 19:00:28,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:28,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:28,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:28,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 19:00:28,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:00:30,071 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:00:30,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:30,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:30,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:30,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:30,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:30,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 19:00:30,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:30,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:30,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:30,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:30,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400448705] [2020-10-28 19:00:30,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:30,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:00:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208372931] [2020-10-28 19:00:30,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:30,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:30,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:30,275 INFO L87 Difference]: Start difference. First operand 2038 states. Second operand 6 states. [2020-10-28 19:00:31,851 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-28 19:00:49,462 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-28 19:00:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:50,095 INFO L93 Difference]: Finished difference Result 3342 states and 5879 transitions. [2020-10-28 19:00:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:00:50,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 19:00:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:50,137 INFO L225 Difference]: With dead ends: 3342 [2020-10-28 19:00:50,137 INFO L226 Difference]: Without dead ends: 2135 [2020-10-28 19:00:50,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:00:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2020-10-28 19:00:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2123. [2020-10-28 19:00:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2123 states. [2020-10-28 19:00:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 2855 transitions. [2020-10-28 19:00:50,331 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 2855 transitions. Word has length 69 [2020-10-28 19:00:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:50,332 INFO L481 AbstractCegarLoop]: Abstraction has 2123 states and 2855 transitions. [2020-10-28 19:00:50,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 2855 transitions. [2020-10-28 19:00:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:00:50,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:50,340 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] [2020-10-28 19:00:50,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:00:50,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:50,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1750230333, now seen corresponding path program 1 times [2020-10-28 19:00:50,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:50,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57977609] [2020-10-28 19:00:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:51,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:53,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:54,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:55,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:55,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:00:55,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:00:55,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:00:55,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:55,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:55,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:55,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 19:00:55,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:56,953 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:00:56,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:56,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:57,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:57,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:57,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:57,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 19:00:57,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:57,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:57,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:57,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:57,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:57,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57977609] [2020-10-28 19:00:57,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:57,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:00:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169152043] [2020-10-28 19:00:57,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:57,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:57,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:57,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:57,090 INFO L87 Difference]: Start difference. First operand 2123 states and 2855 transitions. Second operand 6 states. [2020-10-28 19:00:58,720 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-28 19:01:10,858 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 453 [2020-10-28 19:01:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:12,712 INFO L93 Difference]: Finished difference Result 4154 states and 5659 transitions. [2020-10-28 19:01:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:01:12,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 19:01:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:12,732 INFO L225 Difference]: With dead ends: 4154 [2020-10-28 19:01:12,733 INFO L226 Difference]: Without dead ends: 2841 [2020-10-28 19:01:12,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:01:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2020-10-28 19:01:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2829. [2020-10-28 19:01:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2829 states. [2020-10-28 19:01:12,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 3792 transitions. [2020-10-28 19:01:12,869 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 3792 transitions. Word has length 70 [2020-10-28 19:01:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:12,869 INFO L481 AbstractCegarLoop]: Abstraction has 2829 states and 3792 transitions. [2020-10-28 19:01:12,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 3792 transitions. [2020-10-28 19:01:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 19:01:12,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:12,876 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] [2020-10-28 19:01:12,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:01:12,877 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash -983688255, now seen corresponding path program 1 times [2020-10-28 19:01:12,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:12,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393466958] [2020-10-28 19:01:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:12,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:13,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:14,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:14,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:14,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:16,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:17,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:17,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:17,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 19:01:17,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:01:17,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 19:01:17,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:17,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:01:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:01:17,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:01:17,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:19,675 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:01:19,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:19,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:19,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:19,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:19,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:19,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393466958] [2020-10-28 19:01:19,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:19,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:01:19,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482632171] [2020-10-28 19:01:19,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:01:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:01:19,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:01:19,763 INFO L87 Difference]: Start difference. First operand 2829 states and 3792 transitions. Second operand 8 states. [2020-10-28 19:01:21,387 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification that was a NOOP. DAG size: 460 [2020-10-28 19:01:34,761 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 456 [2020-10-28 19:01:36,723 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-28 19:01:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:39,572 INFO L93 Difference]: Finished difference Result 3329 states and 4511 transitions. [2020-10-28 19:01:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:01:39,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-28 19:01:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:39,590 INFO L225 Difference]: With dead ends: 3329 [2020-10-28 19:01:39,590 INFO L226 Difference]: Without dead ends: 3323 [2020-10-28 19:01:39,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-28 19:01:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2020-10-28 19:01:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 2829. [2020-10-28 19:01:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2829 states. [2020-10-28 19:01:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 3791 transitions. [2020-10-28 19:01:39,735 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 3791 transitions. Word has length 70 [2020-10-28 19:01:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:39,735 INFO L481 AbstractCegarLoop]: Abstraction has 2829 states and 3791 transitions. [2020-10-28 19:01:39,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:01:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 3791 transitions. [2020-10-28 19:01:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:01:39,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:39,742 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] [2020-10-28 19:01:39,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:01:39,743 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:39,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1007721704, now seen corresponding path program 1 times [2020-10-28 19:01:39,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:39,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060223749] [2020-10-28 19:01:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:39,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:39,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:41,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:43,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:44,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:01:44,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 19:01:44,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:01:44,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:44,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 19:01:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:01:44,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 19:01:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:46,758 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:01:46,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:46,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:46,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:46,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:46,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:46,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060223749] [2020-10-28 19:01:46,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:46,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-28 19:01:46,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335875310] [2020-10-28 19:01:46,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 19:01:46,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 19:01:46,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:01:46,854 INFO L87 Difference]: Start difference. First operand 2829 states and 3791 transitions. Second operand 13 states. [2020-10-28 19:01:48,439 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 458 [2020-10-28 19:02:00,022 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 460 [2020-10-28 19:02:03,940 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-28 19:02:05,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:05,125 INFO L93 Difference]: Finished difference Result 6738 states and 9375 transitions. [2020-10-28 19:02:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 19:02:05,126 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-10-28 19:02:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:05,148 INFO L225 Difference]: With dead ends: 6738 [2020-10-28 19:02:05,148 INFO L226 Difference]: Without dead ends: 4149 [2020-10-28 19:02:05,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-10-28 19:02:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2020-10-28 19:02:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3113. [2020-10-28 19:02:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3113 states. [2020-10-28 19:02:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 4235 transitions. [2020-10-28 19:02:05,347 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 4235 transitions. Word has length 71 [2020-10-28 19:02:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:05,348 INFO L481 AbstractCegarLoop]: Abstraction has 3113 states and 4235 transitions. [2020-10-28 19:02:05,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 19:02:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 4235 transitions. [2020-10-28 19:02:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:02:05,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:05,354 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] [2020-10-28 19:02:05,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:02:05,355 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:05,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1754369719, now seen corresponding path program 1 times [2020-10-28 19:02:05,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:05,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773025007] [2020-10-28 19:02:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:05,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:05,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:05,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:05,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:07,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:07,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:08,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:08,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:08,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:10,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:02:10,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:02:10,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 19:02:10,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:11,795 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:02:11,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:11,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:11,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:11,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:11,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:11,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 19:02:11,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:11,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:02:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:11,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:02:11,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:02:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:11,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773025007] [2020-10-28 19:02:11,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:11,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:02:11,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915001511] [2020-10-28 19:02:11,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:02:11,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:11,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:02:11,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:02:11,928 INFO L87 Difference]: Start difference. First operand 3113 states and 4235 transitions. Second operand 6 states. [2020-10-28 19:02:13,484 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-28 19:02:23,720 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-28 19:02:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:24,149 INFO L93 Difference]: Finished difference Result 7056 states and 9766 transitions. [2020-10-28 19:02:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:02:24,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-28 19:02:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:24,170 INFO L225 Difference]: With dead ends: 7056 [2020-10-28 19:02:24,171 INFO L226 Difference]: Without dead ends: 4664 [2020-10-28 19:02:24,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:02:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4664 states. [2020-10-28 19:02:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4664 to 4661. [2020-10-28 19:02:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4661 states. [2020-10-28 19:02:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 6372 transitions. [2020-10-28 19:02:24,440 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 6372 transitions. Word has length 71 [2020-10-28 19:02:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:24,440 INFO L481 AbstractCegarLoop]: Abstraction has 4661 states and 6372 transitions. [2020-10-28 19:02:24,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:02:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 6372 transitions. [2020-10-28 19:02:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:02:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:24,448 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] [2020-10-28 19:02:24,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:02:24,449 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1263452116, now seen corresponding path program 1 times [2020-10-28 19:02:24,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:24,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157597203] [2020-10-28 19:02:24,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:24,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:24,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:25,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:25,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:28,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:28,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:02:28,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:02:28,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4252 [2020-10-28 19:02:28,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:28,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:28,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:02:28,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:02:28,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 19:02:28,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:30,386 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:02:30,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:30,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:30,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:30,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:30,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:30,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 19:02:30,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:30,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:30,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:30,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:02:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:30,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157597203] [2020-10-28 19:02:30,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:30,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:02:30,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134187646] [2020-10-28 19:02:30,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:02:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:02:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:02:30,478 INFO L87 Difference]: Start difference. First operand 4661 states and 6372 transitions. Second operand 9 states. [2020-10-28 19:02:32,082 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-28 19:02:41,113 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-28 19:02:43,251 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 458 [2020-10-28 19:02:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:45,333 INFO L93 Difference]: Finished difference Result 10414 states and 15239 transitions. [2020-10-28 19:02:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:02:45,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-28 19:02:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:45,377 INFO L225 Difference]: With dead ends: 10414 [2020-10-28 19:02:45,377 INFO L226 Difference]: Without dead ends: 9755 [2020-10-28 19:02:45,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:02:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9755 states. [2020-10-28 19:02:45,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9755 to 5958. [2020-10-28 19:02:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5958 states. [2020-10-28 19:02:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5958 states to 5958 states and 8322 transitions. [2020-10-28 19:02:45,756 INFO L78 Accepts]: Start accepts. Automaton has 5958 states and 8322 transitions. Word has length 72 [2020-10-28 19:02:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:45,756 INFO L481 AbstractCegarLoop]: Abstraction has 5958 states and 8322 transitions. [2020-10-28 19:02:45,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:02:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5958 states and 8322 transitions. [2020-10-28 19:02:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:02:45,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:45,764 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] [2020-10-28 19:02:45,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:02:45,765 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1441564322, now seen corresponding path program 1 times [2020-10-28 19:02:45,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:45,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364945065] [2020-10-28 19:02:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:45,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:46,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:48,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:48,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:48,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:49,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:49,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:50,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:50,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:02:50,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 19:02:50,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:52,278 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:02:52,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:52,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:52,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364945065] [2020-10-28 19:02:52,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:52,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:02:52,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035402950] [2020-10-28 19:02:52,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:02:52,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:02:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:02:52,335 INFO L87 Difference]: Start difference. First operand 5958 states and 8322 transitions. Second operand 6 states. [2020-10-28 19:02:53,759 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 19:03:03,867 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-28 19:03:06,193 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-28 19:03:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:08,712 INFO L93 Difference]: Finished difference Result 17366 states and 25744 transitions. [2020-10-28 19:03:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 19:03:08,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 19:03:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:08,746 INFO L225 Difference]: With dead ends: 17366 [2020-10-28 19:03:08,746 INFO L226 Difference]: Without dead ends: 14725 [2020-10-28 19:03:08,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 19:03:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14725 states. [2020-10-28 19:03:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14725 to 8123. [2020-10-28 19:03:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8123 states. [2020-10-28 19:03:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8123 states to 8123 states and 11415 transitions. [2020-10-28 19:03:09,340 INFO L78 Accepts]: Start accepts. Automaton has 8123 states and 11415 transitions. Word has length 72 [2020-10-28 19:03:09,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:09,340 INFO L481 AbstractCegarLoop]: Abstraction has 8123 states and 11415 transitions. [2020-10-28 19:03:09,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:03:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 8123 states and 11415 transitions. [2020-10-28 19:03:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:03:09,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:09,350 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] [2020-10-28 19:03:09,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:03:09,350 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1442592574, now seen corresponding path program 1 times [2020-10-28 19:03:09,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:09,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909030927] [2020-10-28 19:03:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:09,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:09,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:09,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:11,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:11,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:12,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:13,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:14,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:14,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:14,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:03:14,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:03:14,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:03:14,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:14,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:03:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:03:14,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 19:03:14,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:15,902 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:03:15,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:15,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:15,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:15,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:15,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:03:15,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:15,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:15,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:15,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:15,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:15,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:15,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909030927] [2020-10-28 19:03:15,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:15,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:03:15,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188446233] [2020-10-28 19:03:15,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:03:15,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:03:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:03:15,963 INFO L87 Difference]: Start difference. First operand 8123 states and 11415 transitions. Second operand 9 states. [2020-10-28 19:03:17,535 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 460 [2020-10-28 19:03:27,350 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 462 [2020-10-28 19:03:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:29,715 INFO L93 Difference]: Finished difference Result 17893 states and 26463 transitions. [2020-10-28 19:03:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:03:29,716 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-10-28 19:03:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:29,746 INFO L225 Difference]: With dead ends: 17893 [2020-10-28 19:03:29,747 INFO L226 Difference]: Without dead ends: 15517 [2020-10-28 19:03:29,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-28 19:03:29,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15517 states. [2020-10-28 19:03:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15517 to 9788. [2020-10-28 19:03:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9788 states. [2020-10-28 19:03:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9788 states to 9788 states and 13970 transitions. [2020-10-28 19:03:30,551 INFO L78 Accepts]: Start accepts. Automaton has 9788 states and 13970 transitions. Word has length 73 [2020-10-28 19:03:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:30,552 INFO L481 AbstractCegarLoop]: Abstraction has 9788 states and 13970 transitions. [2020-10-28 19:03:30,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:03:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9788 states and 13970 transitions. [2020-10-28 19:03:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:03:30,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:30,562 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] [2020-10-28 19:03:30,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:03:30,563 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1697427963, now seen corresponding path program 1 times [2020-10-28 19:03:30,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:30,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802394716] [2020-10-28 19:03:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:30,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:30,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:30,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:31,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:32,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:33,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:35,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:35,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:03:35,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:03:35,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5164 [2020-10-28 19:03:35,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:35,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:35,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:03:35,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:03:35,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:03:35,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:03:37,182 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-28 19:03:37,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:37,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:37,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:37,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:37,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:03:37,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:37,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802394716] [2020-10-28 19:03:37,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:37,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:03:37,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218950978] [2020-10-28 19:03:37,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:03:37,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:03:37,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:03:37,263 INFO L87 Difference]: Start difference. First operand 9788 states and 13970 transitions. Second operand 6 states. [2020-10-28 19:03:38,722 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-28 19:03:48,041 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-28 19:03:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:48,378 INFO L93 Difference]: Finished difference Result 12417 states and 18025 transitions. [2020-10-28 19:03:48,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:03:48,378 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 19:03:48,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:48,393 INFO L225 Difference]: With dead ends: 12417 [2020-10-28 19:03:48,393 INFO L226 Difference]: Without dead ends: 6836 [2020-10-28 19:03:48,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:03:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2020-10-28 19:03:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6833. [2020-10-28 19:03:48,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6833 states. [2020-10-28 19:03:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6833 states to 6833 states and 9669 transitions. [2020-10-28 19:03:48,956 INFO L78 Accepts]: Start accepts. Automaton has 6833 states and 9669 transitions. Word has length 73 [2020-10-28 19:03:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:48,956 INFO L481 AbstractCegarLoop]: Abstraction has 6833 states and 9669 transitions. [2020-10-28 19:03:48,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:03:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 6833 states and 9669 transitions. [2020-10-28 19:03:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:03:48,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:48,966 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] [2020-10-28 19:03:48,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:03:48,966 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:48,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:48,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1819331020, now seen corresponding path program 1 times [2020-10-28 19:03:48,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:48,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669337119] [2020-10-28 19:03:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:49,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:52,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:52,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking...