/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-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:38:56,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:38:56,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:38:56,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:38:56,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:38:56,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:38:56,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:38:56,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:38:56,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:38:56,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:38:56,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:38:56,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:38:56,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:38:56,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:38:56,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:38:56,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:38:56,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:38:56,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:38:56,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:38:56,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:38:56,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:38:56,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:38:56,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:38:56,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:38:56,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:38:56,606 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:38:56,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:38:56,609 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:38:56,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:38:56,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:38:56,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:38:56,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:38:56,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:38:56,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:38:56,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:38:56,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:38:56,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:38:56,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:38:56,617 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:38:56,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:38:56,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:38:56,619 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 05:38:56,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:38:56,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:38:56,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:38:56,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:38:56,663 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:38:56,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:38:56,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:38:56,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:38:56,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:38:56,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:38:56,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:38:56,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:38:56,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:38:56,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:38:56,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:38:56,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:38:56,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:38:56,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:38:56,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:38:56,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:38:56,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:38:56,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:38:56,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:38:56,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:38:56,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:38:56,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:38:56,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:38:56,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:38:56,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:38:56,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:38:57,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:38:57,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:38:57,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:38:57,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:38:57,126 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:38:57,127 INFO L432 ainManager$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.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:38:57,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccdf67271/249a679f5cd44ebea8bbc2a9354d4bb9/FLAGc9a80d081 [2020-10-27 05:38:58,193 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:38:58,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:38:58,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccdf67271/249a679f5cd44ebea8bbc2a9354d4bb9/FLAGc9a80d081 [2020-10-27 05:38:58,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccdf67271/249a679f5cd44ebea8bbc2a9354d4bb9 [2020-10-27 05:38:58,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:38:58,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:38:58,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:38:58,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:38:58,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:38:58,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:58" (1/1) ... [2020-10-27 05:38:58,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76222ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:58, skipping insertion in model container [2020-10-27 05:38:58,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:58" (1/1) ... [2020-10-27 05:38:58,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:38:58,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:38:59,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:38:59,819 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:39:00,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:39:00,203 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:39:00,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00 WrapperNode [2020-10-27 05:39:00,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:39:00,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:39:00,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:39:00,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:39:00,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (1/1) ... [2020-10-27 05:39:00,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:39:00,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:39:00,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:39:00,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:39:00,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (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 05:39:00,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:39:00,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:39:00,577 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:39:00,578 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:39:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:39:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:39:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:39:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:39:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:39:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:39:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:39:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:39:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:39:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:39:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:39:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:39:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:39:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:39:00,583 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:39:00,583 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:39:00,583 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:39:00,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:39:00,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:39:00,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:39:00,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:39:00,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:39:00,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:39:00,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:39:04,398 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:39:04,398 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:39:04,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:39:04 BoogieIcfgContainer [2020-10-27 05:39:04,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:39:04,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:39:04,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:39:04,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:39:04,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:38:58" (1/3) ... [2020-10-27 05:39:04,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0e61a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:39:04, skipping insertion in model container [2020-10-27 05:39:04,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:39:00" (2/3) ... [2020-10-27 05:39:04,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0e61a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:39:04, skipping insertion in model container [2020-10-27 05:39:04,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:39:04" (3/3) ... [2020-10-27 05:39:04,411 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-27 05:39:04,422 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:39:04,428 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:39:04,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:39:04,475 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:39:04,475 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:39:04,475 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:39:04,475 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:39:04,475 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:39:04,476 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:39:04,476 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:39:04,476 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:39:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states. [2020-10-27 05:39:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:39:04,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:04,540 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] [2020-10-27 05:39:04,541 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1096909937, now seen corresponding path program 1 times [2020-10-27 05:39:04,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:04,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991394433] [2020-10-27 05:39:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:05,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:06,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:08,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:09,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:10,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:39:10,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:39:10,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-27 05:39:10,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:10,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:39:10,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:10,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:39:10,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:39:11,521 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:39:11,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:11,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:11,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:11,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:11,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:11,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 05:39:11,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:11,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:11,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:11,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:11,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:11,672 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 05:39:11,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991394433] [2020-10-27 05:39:11,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:11,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:11,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308055614] [2020-10-27 05:39:11,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:39:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:39:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:11,703 INFO L87 Difference]: Start difference. First operand 1263 states. Second operand 11 states. [2020-10-27 05:39:13,838 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 361 DAG size of output: 359 [2020-10-27 05:39:32,039 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 364 DAG size of output: 356 [2020-10-27 05:39:36,129 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 356 DAG size of output: 354 [2020-10-27 05:39:37,001 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:39:40,222 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 354 DAG size of output: 351 [2020-10-27 05:39:43,398 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 362 DAG size of output: 350 [2020-10-27 05:39:43,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:43,991 INFO L93 Difference]: Finished difference Result 4073 states and 6946 transitions. [2020-10-27 05:39:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:39:43,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:39:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:44,050 INFO L225 Difference]: With dead ends: 4073 [2020-10-27 05:39:44,050 INFO L226 Difference]: Without dead ends: 3877 [2020-10-27 05:39:44,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:39:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2020-10-27 05:39:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 1248. [2020-10-27 05:39:44,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1248 states. [2020-10-27 05:39:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1671 transitions. [2020-10-27 05:39:44,253 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1671 transitions. Word has length 56 [2020-10-27 05:39:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:44,253 INFO L481 AbstractCegarLoop]: Abstraction has 1248 states and 1671 transitions. [2020-10-27 05:39:44,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:39:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1671 transitions. [2020-10-27 05:39:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:39:44,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:44,259 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] [2020-10-27 05:39:44,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:39:44,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:44,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1066679324, now seen corresponding path program 1 times [2020-10-27 05:39:44,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:44,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111441024] [2020-10-27 05:39:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:44,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:45,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:45,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:47,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:47,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:49,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:49,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:39:49,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:39:49,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 05:39:49,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:39:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:49,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:39:49,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:50,424 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:39:50,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:50,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:50,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:50,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:50,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:50,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-27 05:39:50,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:50,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:50,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:50,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:50,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:50,555 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 05:39:50,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111441024] [2020-10-27 05:39:50,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:50,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887993960] [2020-10-27 05:39:50,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:39:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:50,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:39:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:50,559 INFO L87 Difference]: Start difference. First operand 1248 states and 1671 transitions. Second operand 11 states. [2020-10-27 05:39:51,519 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:40:01,596 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:40:03,327 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 350 DAG size of output: 349 [2020-10-27 05:40:06,442 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 352 DAG size of output: 352 [2020-10-27 05:40:09,486 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:40:11,493 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 353 DAG size of output: 349 [2020-10-27 05:40:13,264 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 351 DAG size of output: 351 [2020-10-27 05:40:15,428 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 354 DAG size of output: 353 [2020-10-27 05:40:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:16,093 INFO L93 Difference]: Finished difference Result 4666 states and 6562 transitions. [2020-10-27 05:40:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 05:40:16,093 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:40:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:16,112 INFO L225 Difference]: With dead ends: 4666 [2020-10-27 05:40:16,112 INFO L226 Difference]: Without dead ends: 3550 [2020-10-27 05:40:16,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:40:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-10-27 05:40:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2936. [2020-10-27 05:40:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2936 states. [2020-10-27 05:40:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 4073 transitions. [2020-10-27 05:40:16,380 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 4073 transitions. Word has length 57 [2020-10-27 05:40:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:16,381 INFO L481 AbstractCegarLoop]: Abstraction has 2936 states and 4073 transitions. [2020-10-27 05:40:16,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:40:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 4073 transitions. [2020-10-27 05:40:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:40:16,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:16,386 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] [2020-10-27 05:40:16,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:40:16,387 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash 7588088, now seen corresponding path program 1 times [2020-10-27 05:40:16,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:16,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800709164] [2020-10-27 05:40:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:16,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:16,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:16,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:16,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:17,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:19,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:20,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:21,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:21,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:40:21,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:40:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:40:21,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:40:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:40:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:22,429 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:40:22,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:22,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:22,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:22,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:22,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:40:22,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:22,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:22,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:40:22,536 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 05:40:22,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800709164] [2020-10-27 05:40:22,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:22,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:40:22,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631313041] [2020-10-27 05:40:22,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:40:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:22,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:40:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:40:22,538 INFO L87 Difference]: Start difference. First operand 2936 states and 4073 transitions. Second operand 12 states. [2020-10-27 05:40:23,552 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:40:29,392 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:40:30,765 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:40:31,699 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 05:40:36,696 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:40:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:37,703 INFO L93 Difference]: Finished difference Result 6592 states and 9636 transitions. [2020-10-27 05:40:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 05:40:37,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-27 05:40:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:37,726 INFO L225 Difference]: With dead ends: 6592 [2020-10-27 05:40:37,726 INFO L226 Difference]: Without dead ends: 4637 [2020-10-27 05:40:37,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:40:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2020-10-27 05:40:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 2985. [2020-10-27 05:40:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-10-27 05:40:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 4224 transitions. [2020-10-27 05:40:38,032 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 4224 transitions. Word has length 57 [2020-10-27 05:40:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:38,033 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 4224 transitions. [2020-10-27 05:40:38,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:40:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 4224 transitions. [2020-10-27 05:40:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:40:38,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:38,037 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] [2020-10-27 05:40:38,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:40:38,037 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash 129982199, now seen corresponding path program 1 times [2020-10-27 05:40:38,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:38,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318895070] [2020-10-27 05:40:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:38,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:38,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:38,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:39,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:39,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:39,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:41,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:43,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:43,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:40:43,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:40:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:40:43,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:40:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:40:43,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:44,188 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:40:44,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:44,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:44,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:44,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:44,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:44,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 05:40:44,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:44,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:44,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:44,296 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 05:40:44,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318895070] [2020-10-27 05:40:44,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:44,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:40:44,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815945661] [2020-10-27 05:40:44,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:40:44,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:40:44,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:40:44,298 INFO L87 Difference]: Start difference. First operand 2985 states and 4224 transitions. Second operand 13 states. [2020-10-27 05:40:46,257 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 357 DAG size of output: 356 [2020-10-27 05:40:52,371 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:40:53,668 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:40:55,422 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 352 DAG size of output: 351 [2020-10-27 05:40:58,501 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 353 DAG size of output: 353 [2020-10-27 05:41:03,734 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 353 DAG size of output: 352 [2020-10-27 05:41:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:05,132 INFO L93 Difference]: Finished difference Result 6964 states and 10353 transitions. [2020-10-27 05:41:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 05:41:05,137 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-27 05:41:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:05,164 INFO L225 Difference]: With dead ends: 6964 [2020-10-27 05:41:05,164 INFO L226 Difference]: Without dead ends: 5799 [2020-10-27 05:41:05,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=427, Invalid=1553, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:41:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5799 states. [2020-10-27 05:41:05,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5799 to 2985. [2020-10-27 05:41:05,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-10-27 05:41:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 4223 transitions. [2020-10-27 05:41:05,536 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 4223 transitions. Word has length 58 [2020-10-27 05:41:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:05,537 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 4223 transitions. [2020-10-27 05:41:05,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:41:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 4223 transitions. [2020-10-27 05:41:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:41:05,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:05,542 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] [2020-10-27 05:41:05,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:41:05,542 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:05,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1253215674, now seen corresponding path program 1 times [2020-10-27 05:41:05,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:05,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466217432] [2020-10-27 05:41:05,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:05,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:05,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:05,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:07,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:07,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:08,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:08,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:09,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:09,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:09,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:10,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:10,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:41:10,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:41:10,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:41:10,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:10,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 05:41:10,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:41:10,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:11,767 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:41:11,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:11,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:11,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:11,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:11,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:11,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:41:11,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:11,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:11,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:11,863 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 05:41:11,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466217432] [2020-10-27 05:41:11,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:11,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-27 05:41:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048878283] [2020-10-27 05:41:11,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 05:41:11,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:11,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 05:41:11,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:41:11,866 INFO L87 Difference]: Start difference. First operand 2985 states and 4223 transitions. Second operand 14 states. [2020-10-27 05:41:13,961 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 362 DAG size of output: 360 [2020-10-27 05:41:21,925 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 353 DAG size of output: 351 [2020-10-27 05:41:23,368 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:41:24,285 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification that was a NOOP. DAG size: 348 [2020-10-27 05:41:30,332 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:41:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:31,588 INFO L93 Difference]: Finished difference Result 7014 states and 10295 transitions. [2020-10-27 05:41:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 05:41:31,589 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-27 05:41:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:31,619 INFO L225 Difference]: With dead ends: 7014 [2020-10-27 05:41:31,620 INFO L226 Difference]: Without dead ends: 7008 [2020-10-27 05:41:31,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=379, Invalid=1513, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 05:41:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7008 states. [2020-10-27 05:41:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7008 to 2985. [2020-10-27 05:41:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2985 states. [2020-10-27 05:41:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 4222 transitions. [2020-10-27 05:41:31,992 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 4222 transitions. Word has length 58 [2020-10-27 05:41:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:31,992 INFO L481 AbstractCegarLoop]: Abstraction has 2985 states and 4222 transitions. [2020-10-27 05:41:31,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 05:41:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 4222 transitions. [2020-10-27 05:41:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:41:31,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:31,996 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] [2020-10-27 05:41:31,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:41:31,996 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash -48630988, now seen corresponding path program 1 times [2020-10-27 05:41:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:31,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872198758] [2020-10-27 05:41:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:32,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:32,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:32,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:32,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:33,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:33,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:34,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:35,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:36,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:37,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:37,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:41:37,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:41:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:41:37,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 05:41:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:41:37,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:41:37,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:38,276 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:41:38,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:38,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:38,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:41:38,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:38,359 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 05:41:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872198758] [2020-10-27 05:41:38,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:38,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 05:41:38,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646092709] [2020-10-27 05:41:38,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 05:41:38,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 05:41:38,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:41:38,362 INFO L87 Difference]: Start difference. First operand 2985 states and 4222 transitions. Second operand 13 states. [2020-10-27 05:41:40,403 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 361 DAG size of output: 357 [2020-10-27 05:41:45,929 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-27 05:41:46,813 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2020-10-27 05:41:48,722 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 354 DAG size of output: 350 [2020-10-27 05:41:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:53,851 INFO L93 Difference]: Finished difference Result 9365 states and 14117 transitions. [2020-10-27 05:41:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:41:53,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 58 [2020-10-27 05:41:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:53,869 INFO L225 Difference]: With dead ends: 9365 [2020-10-27 05:41:53,869 INFO L226 Difference]: Without dead ends: 7670 [2020-10-27 05:41:53,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:41:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2020-10-27 05:41:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 4805. [2020-10-27 05:41:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4805 states. [2020-10-27 05:41:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4805 states to 4805 states and 7021 transitions. [2020-10-27 05:41:54,431 INFO L78 Accepts]: Start accepts. Automaton has 4805 states and 7021 transitions. Word has length 58 [2020-10-27 05:41:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:54,431 INFO L481 AbstractCegarLoop]: Abstraction has 4805 states and 7021 transitions. [2020-10-27 05:41:54,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 05:41:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4805 states and 7021 transitions. [2020-10-27 05:41:54,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:41:54,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:54,439 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] [2020-10-27 05:41:54,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:41:54,439 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:54,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2003024578, now seen corresponding path program 1 times [2020-10-27 05:41:54,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:54,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104285790] [2020-10-27 05:41:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:54,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:54,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:54,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:55,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:57,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:57,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:41:57,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:41:57,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3466 [2020-10-27 05:41:57,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:57,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:41:57,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:41:57,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:41:57,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:58,876 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:41:58,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:58,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:58,922 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 05:41:58,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104285790] [2020-10-27 05:41:58,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:58,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:41:58,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874949516] [2020-10-27 05:41:58,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:41:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:41:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:41:58,924 INFO L87 Difference]: Start difference. First operand 4805 states and 7021 transitions. Second operand 8 states. [2020-10-27 05:41:59,872 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-27 05:42:02,813 WARN L193 SmtUtils]: Spent 862.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:42:05,248 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification that was a NOOP. DAG size: 350 [2020-10-27 05:42:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:06,991 INFO L93 Difference]: Finished difference Result 14359 states and 21992 transitions. [2020-10-27 05:42:06,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:42:06,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-27 05:42:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:07,013 INFO L225 Difference]: With dead ends: 14359 [2020-10-27 05:42:07,014 INFO L226 Difference]: Without dead ends: 10510 [2020-10-27 05:42:07,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-27 05:42:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10510 states. [2020-10-27 05:42:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10510 to 5101. [2020-10-27 05:42:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5101 states. [2020-10-27 05:42:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5101 states to 5101 states and 7657 transitions. [2020-10-27 05:42:07,724 INFO L78 Accepts]: Start accepts. Automaton has 5101 states and 7657 transitions. Word has length 59 [2020-10-27 05:42:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:07,725 INFO L481 AbstractCegarLoop]: Abstraction has 5101 states and 7657 transitions. [2020-10-27 05:42:07,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:42:07,725 INFO L276 IsEmpty]: Start isEmpty. Operand 5101 states and 7657 transitions. [2020-10-27 05:42:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:42:07,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:07,727 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] [2020-10-27 05:42:07,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:42:07,727 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:07,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:07,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1976745880, now seen corresponding path program 1 times [2020-10-27 05:42:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:07,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188196240] [2020-10-27 05:42:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:07,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:08,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:08,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4281 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:42:12,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:13,223 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:42:13,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:13,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:42:13,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:13,312 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 05:42:13,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188196240] [2020-10-27 05:42:13,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:13,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:42:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900300052] [2020-10-27 05:42:13,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:42:13,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:42:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:42:13,314 INFO L87 Difference]: Start difference. First operand 5101 states and 7657 transitions. Second operand 9 states. [2020-10-27 05:42:14,307 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 359 [2020-10-27 05:42:19,284 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-27 05:42:20,618 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-27 05:42:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:23,127 INFO L93 Difference]: Finished difference Result 21222 states and 33091 transitions. [2020-10-27 05:42:23,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:42:23,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-27 05:42:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:23,172 INFO L225 Difference]: With dead ends: 21222 [2020-10-27 05:42:23,172 INFO L226 Difference]: Without dead ends: 21217 [2020-10-27 05:42:23,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:42:23,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21217 states. [2020-10-27 05:42:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21217 to 5098. [2020-10-27 05:42:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5098 states. [2020-10-27 05:42:24,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 7652 transitions. [2020-10-27 05:42:24,044 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 7652 transitions. Word has length 59 [2020-10-27 05:42:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:24,044 INFO L481 AbstractCegarLoop]: Abstraction has 5098 states and 7652 transitions. [2020-10-27 05:42:24,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:42:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 7652 transitions. [2020-10-27 05:42:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:42:24,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:24,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:42:24,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:42:24,049 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1370519738, now seen corresponding path program 1 times [2020-10-27 05:42:24,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:24,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507840667] [2020-10-27 05:42:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:24,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:28,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4021 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:42:28,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:29,141 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 340 [2020-10-27 05:42:29,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:29,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:29,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:29,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:42:29,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:29,202 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 05:42:29,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507840667] [2020-10-27 05:42:29,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:29,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:42:29,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229416139] [2020-10-27 05:42:29,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:42:29,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:42:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:42:29,204 INFO L87 Difference]: Start difference. First operand 5098 states and 7652 transitions. Second operand 6 states. [2020-10-27 05:42:33,386 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2020-10-27 05:42:34,379 WARN L193 SmtUtils]: Spent 954.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-27 05:42:35,282 WARN L193 SmtUtils]: Spent 873.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-27 05:42:36,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:42:36,517 INFO L93 Difference]: Finished difference Result 13085 states and 20185 transitions. [2020-10-27 05:42:36,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:42:36,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:42:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:42:36,532 INFO L225 Difference]: With dead ends: 13085 [2020-10-27 05:42:36,532 INFO L226 Difference]: Without dead ends: 8693 [2020-10-27 05:42:36,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:42:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8693 states.