/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=DEEPEST --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.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:11:40,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:11:40,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:11:40,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:11:40,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:11:40,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:11:40,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:11:40,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:11:40,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:11:40,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:11:40,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:11:40,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:11:40,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:11:40,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:11:40,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:11:40,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:11:40,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:11:40,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:11:40,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:11:40,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:11:40,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:11:40,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:11:40,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:11:40,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:11:40,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:11:40,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:11:40,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:11:40,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:11:40,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:11:40,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:11:40,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:11:40,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:11:40,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:11:40,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:11:40,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:11:40,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:11:40,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:11:40,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:11:40,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:11:40,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:11:40,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:11:40,123 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 00:11:40,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:11:40,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:11:40,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:11:40,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:11:40,201 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:11:40,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:11:40,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:11:40,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:11:40,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:11:40,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:11:40,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:11:40,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:11:40,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:11:40,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:11:40,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:11:40,207 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:11:40,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:11:40,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:11:40,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:11:40,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:11:40,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:11:40,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:11:40,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:11:40,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:11:40,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:11:40,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:11:40,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:11:40,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:11:40,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:11:40,216 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:11:40,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:11:40,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:11:40,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:11:40,617 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:11:40,617 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:11:40,618 INFO L432 ainManager$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.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 00:11:40,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15df9af3c/72801c6919bb4d79801dc79e112667e0/FLAG7c343909b [2020-10-28 00:11:41,605 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:11:41,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 00:11:41,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15df9af3c/72801c6919bb4d79801dc79e112667e0/FLAG7c343909b [2020-10-28 00:11:42,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15df9af3c/72801c6919bb4d79801dc79e112667e0 [2020-10-28 00:11:42,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:11:42,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:11:42,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:42,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:11:42,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:11:42,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:42" (1/1) ... [2020-10-28 00:11:42,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b6a50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:42, skipping insertion in model container [2020-10-28 00:11:42,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:42" (1/1) ... [2020-10-28 00:11:42,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:11:42,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:11:43,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:43,808 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:11:44,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:44,405 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:11:44,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44 WrapperNode [2020-10-28 00:11:44,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:44,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:11:44,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:11:44,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:11:44,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (1/1) ... [2020-10-28 00:11:44,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:11:44,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:11:44,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:11:44,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:11:44,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (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 00:11:44,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:11:44,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:11:44,769 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:11:44,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:11:44,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:11:44,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:11:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:11:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:11:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:11:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:11:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:11:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:11:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:11:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:11:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:11:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:11:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:11:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:11:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:11:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:11:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:11:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:11:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:11:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:11:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:11:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:11:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:11:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:11:50,505 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:11:50,506 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:11:50,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:50 BoogieIcfgContainer [2020-10-28 00:11:50,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:11:50,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:11:50,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:11:50,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:11:50,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:11:42" (1/3) ... [2020-10-28 00:11:50,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b97993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:50, skipping insertion in model container [2020-10-28 00:11:50,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:44" (2/3) ... [2020-10-28 00:11:50,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b97993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:50, skipping insertion in model container [2020-10-28 00:11:50,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:50" (3/3) ... [2020-10-28 00:11:50,520 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-28 00:11:50,532 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:11:50,538 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:11:50,552 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:11:50,591 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:11:50,591 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:11:50,592 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:11:50,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:11:50,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:11:50,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:11:50,592 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:11:50,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:11:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states. [2020-10-28 00:11:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:11:50,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:50,674 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 00:11:50,675 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:50,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1580064396, now seen corresponding path program 1 times [2020-10-28 00:11:50,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:50,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576885713] [2020-10-28 00:11:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:51,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:51,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:56,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:56,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:11:56,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:11:56,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 00:11:56,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:56,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:11:56,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:11:56,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 00:11:56,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:11:59,671 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 00:11:59,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:59,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:59,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:59,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:59,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 00:11:59,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:59,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:59,840 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 00:11:59,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576885713] [2020-10-28 00:11:59,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:59,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:11:59,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631362399] [2020-10-28 00:11:59,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:11:59,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:11:59,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:11:59,870 INFO L87 Difference]: Start difference. First operand 2055 states. Second operand 11 states. [2020-10-28 00:12:02,889 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-28 00:12:34,622 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 692 [2020-10-28 00:12:41,586 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 690 [2020-10-28 00:12:46,677 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 696 [2020-10-28 00:12:49,549 WARN L193 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-28 00:12:52,495 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 692 [2020-10-28 00:12:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:52,659 INFO L93 Difference]: Finished difference Result 4587 states and 7651 transitions. [2020-10-28 00:12:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:12:52,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 00:12:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:52,713 INFO L225 Difference]: With dead ends: 4587 [2020-10-28 00:12:52,714 INFO L226 Difference]: Without dead ends: 4379 [2020-10-28 00:12:52,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=394, Invalid=1586, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:12:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2020-10-28 00:12:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 2678. [2020-10-28 00:12:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2678 states. [2020-10-28 00:12:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3481 transitions. [2020-10-28 00:12:52,993 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3481 transitions. Word has length 70 [2020-10-28 00:12:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:52,994 INFO L481 AbstractCegarLoop]: Abstraction has 2678 states and 3481 transitions. [2020-10-28 00:12:52,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:12:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3481 transitions. [2020-10-28 00:12:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:12:53,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:53,008 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 00:12:53,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:12:53,009 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:53,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1045507776, now seen corresponding path program 1 times [2020-10-28 00:12:53,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:53,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92537774] [2020-10-28 00:12:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:53,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:54,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:58,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:58,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:12:58,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:12:58,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:12:58,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:58,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:12:58,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:12:58,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:12:58,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:01,055 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 00:13:01,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:01,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:01,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:01,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 00:13:01,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:01,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:01,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:01,192 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 00:13:01,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92537774] [2020-10-28 00:13:01,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:01,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:13:01,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176449391] [2020-10-28 00:13:01,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:13:01,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:01,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:13:01,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:13:01,196 INFO L87 Difference]: Start difference. First operand 2678 states and 3481 transitions. Second operand 7 states. [2020-10-28 00:13:04,129 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 686 [2020-10-28 00:13:22,399 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification that was a NOOP. DAG size: 686 [2020-10-28 00:13:25,892 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-28 00:13:29,158 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-28 00:13:33,372 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-28 00:13:36,913 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-28 00:13:39,774 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 685 [2020-10-28 00:13:42,625 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 686 [2020-10-28 00:13:45,871 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 687 [2020-10-28 00:13:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:45,957 INFO L93 Difference]: Finished difference Result 7707 states and 10235 transitions. [2020-10-28 00:13:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:13:45,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-28 00:13:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:45,987 INFO L225 Difference]: With dead ends: 7707 [2020-10-28 00:13:45,987 INFO L226 Difference]: Without dead ends: 5615 [2020-10-28 00:13:45,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:13:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2020-10-28 00:13:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 5082. [2020-10-28 00:13:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5082 states. [2020-10-28 00:13:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 6656 transitions. [2020-10-28 00:13:46,385 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 6656 transitions. Word has length 71 [2020-10-28 00:13:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:46,385 INFO L481 AbstractCegarLoop]: Abstraction has 5082 states and 6656 transitions. [2020-10-28 00:13:46,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:13:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 6656 transitions. [2020-10-28 00:13:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:13:46,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:46,395 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 00:13:46,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:13:46,396 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1727466358, now seen corresponding path program 1 times [2020-10-28 00:13:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:46,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492533033] [2020-10-28 00:13:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:46,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:46,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:48,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:48,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:48,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:50,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:51,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:51,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:51,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:13:51,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:13:51,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:13:51,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:51,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:13:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:13:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:13:51,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:54,507 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 00:13:54,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:54,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:54,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:54,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:54,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:54,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:13:54,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:54,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:54,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:54,592 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 00:13:54,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492533033] [2020-10-28 00:13:54,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:54,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:13:54,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502184422] [2020-10-28 00:13:54,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:13:54,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:13:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:13:54,595 INFO L87 Difference]: Start difference. First operand 5082 states and 6656 transitions. Second operand 7 states. [2020-10-28 00:13:57,536 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 686 [2020-10-28 00:14:14,023 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 686 [2020-10-28 00:14:17,279 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-28 00:14:20,476 WARN L193 SmtUtils]: Spent 2.80 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-28 00:14:24,182 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-28 00:14:28,518 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-28 00:14:31,404 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 685 [2020-10-28 00:14:34,283 WARN L193 SmtUtils]: Spent 2.79 s on a formula simplification that was a NOOP. DAG size: 686 [2020-10-28 00:14:37,683 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 687 [2020-10-28 00:14:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:37,798 INFO L93 Difference]: Finished difference Result 19981 states and 27988 transitions. [2020-10-28 00:14:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:14:37,798 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-28 00:14:37,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:37,869 INFO L225 Difference]: With dead ends: 19981 [2020-10-28 00:14:37,870 INFO L226 Difference]: Without dead ends: 15274 [2020-10-28 00:14:37,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:14:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15274 states. [2020-10-28 00:14:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15274 to 8850. [2020-10-28 00:14:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8850 states. [2020-10-28 00:14:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8850 states to 8850 states and 11894 transitions. [2020-10-28 00:14:38,572 INFO L78 Accepts]: Start accepts. Automaton has 8850 states and 11894 transitions. Word has length 71 [2020-10-28 00:14:38,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:38,573 INFO L481 AbstractCegarLoop]: Abstraction has 8850 states and 11894 transitions. [2020-10-28 00:14:38,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:14:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8850 states and 11894 transitions. [2020-10-28 00:14:38,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:14:38,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:38,586 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 00:14:38,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:14:38,586 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:38,587 INFO L82 PathProgramCache]: Analyzing trace with hash 53553894, now seen corresponding path program 1 times [2020-10-28 00:14:38,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:38,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317667228] [2020-10-28 00:14:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:38,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:39,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:40,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:43,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:43,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:43,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:14:43,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:14:43,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 00:14:43,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:43,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:14:43,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:14:43,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 00:14:43,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:44,137 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-28 00:14:47,259 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-28 00:14:47,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:47,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:47,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:47,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:47,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 00:14:47,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:47,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:47,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:47,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:47,371 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 00:14:47,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317667228] [2020-10-28 00:14:47,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:47,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:14:47,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882447870] [2020-10-28 00:14:47,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:14:47,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:14:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:14:47,373 INFO L87 Difference]: Start difference. First operand 8850 states and 11894 transitions. Second operand 9 states. [2020-10-28 00:14:53,741 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 713 DAG size of output: 712 [2020-10-28 00:15:12,866 WARN L193 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 710 DAG size of output: 707 [2020-10-28 00:15:17,417 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 700 [2020-10-28 00:15:19,748 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-10-28 00:15:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:20,283 INFO L93 Difference]: Finished difference Result 21384 states and 30858 transitions. [2020-10-28 00:15:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:15:20,284 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-28 00:15:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:20,340 INFO L225 Difference]: With dead ends: 21384 [2020-10-28 00:15:20,340 INFO L226 Difference]: Without dead ends: 21379 [2020-10-28 00:15:20,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-28 00:15:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21379 states. [2020-10-28 00:15:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21379 to 8847. [2020-10-28 00:15:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8847 states. [2020-10-28 00:15:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 11887 transitions. [2020-10-28 00:15:21,376 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 11887 transitions. Word has length 71 [2020-10-28 00:15:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:21,378 INFO L481 AbstractCegarLoop]: Abstraction has 8847 states and 11887 transitions. [2020-10-28 00:15:21,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:15:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 11887 transitions. [2020-10-28 00:15:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:15:21,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:21,392 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 00:15:21,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:15:21,392 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:21,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:21,392 INFO L82 PathProgramCache]: Analyzing trace with hash -790270772, now seen corresponding path program 1 times [2020-10-28 00:15:21,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:21,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288802859] [2020-10-28 00:15:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:21,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:21,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:21,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:21,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking...