/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=SHALLOWEST --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.8.1.ufo.BOUNDED-16.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:31:20,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:31:20,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:31:20,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:31:20,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:31:20,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:31:20,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:31:20,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:31:20,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:31:20,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:31:20,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:31:20,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:31:20,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:31:20,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:31:20,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:31:20,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:31:20,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:31:20,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:31:20,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:31:20,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:31:20,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:31:20,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:31:20,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:31:20,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:31:20,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:31:20,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:31:20,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:31:20,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:31:20,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:31:20,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:31:20,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:31:20,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:31:20,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:31:20,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:31:20,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:31:20,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:31:20,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:31:20,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:31:20,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:31:20,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:31:20,746 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:31:20,747 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 [2020-10-27 05:31:20,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:31:20,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:31:20,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:31:20,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:31:20,774 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:31:20,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:31:20,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:31:20,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:31:20,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:31:20,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:31:20,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:31:20,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:31:20,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:31:20,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:31:20,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:31:20,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:31:20,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:31:20,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:31:20,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:31:20,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:31:20,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:31:20,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:31:20,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:31:20,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:31:20,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:31:20,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:31:20,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:31:20,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:31:20,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:31:20,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:31:21,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:31:21,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:31:21,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:31:21,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:31:21,202 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:31:21,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+lhb-reducer.c [2020-10-27 05:31:21,288 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24d9acb05/a1d6f5894af1422cb67710abbd5d7309/FLAG2876f75db [2020-10-27 05:31:22,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:31:22,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+lhb-reducer.c [2020-10-27 05:31:22,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24d9acb05/a1d6f5894af1422cb67710abbd5d7309/FLAG2876f75db [2020-10-27 05:31:22,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24d9acb05/a1d6f5894af1422cb67710abbd5d7309 [2020-10-27 05:31:22,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:31:22,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:31:22,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:31:22,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:31:22,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:31:22,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:31:22" (1/1) ... [2020-10-27 05:31:22,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c9780bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:22, skipping insertion in model container [2020-10-27 05:31:22,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:31:22" (1/1) ... [2020-10-27 05:31:22,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:31:23,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:31:26,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:31:26,966 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:31:29,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:31:29,474 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:31:29,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29 WrapperNode [2020-10-27 05:31:29,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:31:29,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:31:29,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:31:29,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:31:29,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:29,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:29,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:29,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:29,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:29,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:30,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (1/1) ... [2020-10-27 05:31:30,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:31:30,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:31:30,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:31:30,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:31:30,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (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 [2020-10-27 05:31:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:31:30,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:31:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:31:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:31:30,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:31:30,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:31:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:31:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:31:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:31:30,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:31:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:31:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:31:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:31:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:31:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:31:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:31:30,212 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:31:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:31:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:31:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:31:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:31:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-27 05:31:30,213 INFO L130 BoogieDeclarations]: Found specification of procedure node8 [2020-10-27 05:31:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:31:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:31:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:31:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:31:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:31:30,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:31:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:31:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:31:30,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:31:43,008 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:31:43,008 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:31:43,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:31:43 BoogieIcfgContainer [2020-10-27 05:31:43,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:31:43,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:31:43,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:31:43,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:31:43,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:31:22" (1/3) ... [2020-10-27 05:31:43,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e63a92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:31:43, skipping insertion in model container [2020-10-27 05:31:43,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:31:29" (2/3) ... [2020-10-27 05:31:43,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e63a92a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:31:43, skipping insertion in model container [2020-10-27 05:31:43,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:31:43" (3/3) ... [2020-10-27 05:31:43,024 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.BOUNDED-16.pals.c.v+lhb-reducer.c [2020-10-27 05:31:43,038 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:31:43,046 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:31:43,062 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:31:43,102 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:31:43,102 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:31:43,103 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:31:43,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:31:43,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:31:43,103 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:31:43,103 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:31:43,103 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:31:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3902 states. [2020-10-27 05:31:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 05:31:43,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:31:43,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:31:43,219 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:31:43,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:31:43,226 INFO L82 PathProgramCache]: Analyzing trace with hash 549039713, now seen corresponding path program 1 times [2020-10-27 05:31:43,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:31:43,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346639197] [2020-10-27 05:31:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:31:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:44,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:45,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:45,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:46,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:47,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:49,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:49,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 05:31:49,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:31:49,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-27 05:31:49,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:49,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:31:49,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:31:49,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:31:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:31:59,627 WARN L193 SmtUtils]: Spent 9.97 s on a formula simplification that was a NOOP. DAG size: 1291 [2020-10-27 05:31:59,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:31:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:31:59,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:31:59,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:31:59,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:31:59,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:31:59,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-27 05:31:59,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:31:59,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:31:59,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:31:59,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:31:59,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:32:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:32:00,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346639197] [2020-10-27 05:32:00,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:32:00,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:32:00,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425630446] [2020-10-27 05:32:00,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:32:00,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:32:00,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:32:00,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:32:00,082 INFO L87 Difference]: Start difference. First operand 3902 states. Second operand 6 states. [2020-10-27 05:32:09,828 WARN L193 SmtUtils]: Spent 9.51 s on a formula simplification that was a NOOP. DAG size: 1300 [2020-10-27 05:33:08,907 WARN L193 SmtUtils]: Spent 9.41 s on a formula simplification that was a NOOP. DAG size: 1298 [2020-10-27 05:33:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:33:10,511 INFO L93 Difference]: Finished difference Result 6641 states and 11897 transitions. [2020-10-27 05:33:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:33:10,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2020-10-27 05:33:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:33:10,564 INFO L225 Difference]: With dead ends: 6641 [2020-10-27 05:33:10,565 INFO L226 Difference]: Without dead ends: 3823 [2020-10-27 05:33:10,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:33:10,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2020-10-27 05:33:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3752. [2020-10-27 05:33:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3752 states. [2020-10-27 05:33:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 5142 transitions. [2020-10-27 05:33:10,819 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 5142 transitions. Word has length 122 [2020-10-27 05:33:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:33:10,820 INFO L481 AbstractCegarLoop]: Abstraction has 3752 states and 5142 transitions. [2020-10-27 05:33:10,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:33:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 5142 transitions. [2020-10-27 05:33:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 05:33:10,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:33:10,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:33:10,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:33:10,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:33:10,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:33:10,834 INFO L82 PathProgramCache]: Analyzing trace with hash -557118778, now seen corresponding path program 1 times [2020-10-27 05:33:10,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:33:10,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032276594] [2020-10-27 05:33:10,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:33:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:11,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:11,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:13,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:16,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:16,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-27 05:33:16,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:33:16,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-27 05:33:16,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:33:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:33:16,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:33:16,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:25,767 WARN L193 SmtUtils]: Spent 9.40 s on a formula simplification that was a NOOP. DAG size: 1291 [2020-10-27 05:33:25,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:33:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:33:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:33:26,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:33:26,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:33:26,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:33:26,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 05:33:26,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:33:26,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:33:26,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:33:26,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:33:26,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:33:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:33:26,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032276594] [2020-10-27 05:33:26,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:33:26,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:33:26,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523940759] [2020-10-27 05:33:26,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:33:26,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:33:26,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:33:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:33:26,211 INFO L87 Difference]: Start difference. First operand 3752 states and 5142 transitions. Second operand 6 states. [2020-10-27 05:33:35,959 WARN L193 SmtUtils]: Spent 9.54 s on a formula simplification that was a NOOP. DAG size: 1300 [2020-10-27 05:34:16,545 WARN L193 SmtUtils]: Spent 9.42 s on a formula simplification that was a NOOP. DAG size: 1298 [2020-10-27 05:34:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:18,130 INFO L93 Difference]: Finished difference Result 7894 states and 11235 transitions. [2020-10-27 05:34:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:34:18,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-10-27 05:34:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:18,155 INFO L225 Difference]: With dead ends: 7894 [2020-10-27 05:34:18,155 INFO L226 Difference]: Without dead ends: 4732 [2020-10-27 05:34:18,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2020-10-27 05:34:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4633. [2020-10-27 05:34:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4633 states. [2020-10-27 05:34:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 6643 transitions. [2020-10-27 05:34:18,364 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 6643 transitions. Word has length 123 [2020-10-27 05:34:18,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:18,365 INFO L481 AbstractCegarLoop]: Abstraction has 4633 states and 6643 transitions. [2020-10-27 05:34:18,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 6643 transitions. [2020-10-27 05:34:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 05:34:18,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:18,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:18,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:34:18,376 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2015838211, now seen corresponding path program 1 times [2020-10-27 05:34:18,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:18,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709994539] [2020-10-27 05:34:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:18,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:18,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:23,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:23,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 05:34:23,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:34:23,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 05:34:23,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:23,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:23,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 05:34:23,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:34:33,273 WARN L193 SmtUtils]: Spent 9.32 s on a formula simplification that was a NOOP. DAG size: 1291 [2020-10-27 05:34:33,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:33,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:33,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:33,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:33,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:33,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 05:34:33,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:33,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:33,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:33,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:33,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709994539] [2020-10-27 05:34:33,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:33,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:34:33,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391629376] [2020-10-27 05:34:33,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:33,629 INFO L87 Difference]: Start difference. First operand 4633 states and 6643 transitions. Second operand 6 states. [2020-10-27 05:34:43,514 WARN L193 SmtUtils]: Spent 9.68 s on a formula simplification that was a NOOP. DAG size: 1300