/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:54:09,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:54:09,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:54:09,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:54:09,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:54:09,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:54:09,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:54:09,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:54:09,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:54:09,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:54:09,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:54:09,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:54:09,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:54:09,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:54:09,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:54:09,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:54:09,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:54:09,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:54:09,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:54:09,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:54:09,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:54:09,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:54:09,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:54:09,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:54:09,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:54:09,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:54:09,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:54:09,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:54:09,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:54:09,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:54:09,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:54:09,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:54:09,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:54:09,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:54:09,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:54:09,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:54:09,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:54:09,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:54:09,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:54:09,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:54:09,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:54:09,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:54:09,493 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:54:09,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:54:09,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:54:09,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:54:09,496 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:54:09,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:54:09,497 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:54:09,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:54:09,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:54:09,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:54:09,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:54:09,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:54:09,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:54:09,498 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:54:09,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:54:09,498 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:54:09,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:54:09,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:54:09,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:54:09,499 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:54:09,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:54:09,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:09,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:54:09,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:54:09,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:54:09,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:54:09,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:54:09,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:54:09,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:54:09,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:54:09,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:54:09,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:54:09,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:54:09,956 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:54:09,957 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:54:09,959 INFO L432 ainManager$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.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:54:10,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cc7460de/769f3281a0bd4172bd65ff23d6bf1b0a/FLAG0e3afc586 [2020-10-28 18:54:10,778 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:54:10,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:54:10,790 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cc7460de/769f3281a0bd4172bd65ff23d6bf1b0a/FLAG0e3afc586 [2020-10-28 18:54:11,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cc7460de/769f3281a0bd4172bd65ff23d6bf1b0a [2020-10-28 18:54:11,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:54:11,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:54:11,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:11,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:54:11,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:54:11,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa0748e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11, skipping insertion in model container [2020-10-28 18:54:11,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:54:11,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:54:11,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:11,618 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:54:11,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:11,746 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:54:11,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11 WrapperNode [2020-10-28 18:54:11,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:11,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:54:11,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:54:11,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:54:11,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... [2020-10-28 18:54:11,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:54:11,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:54:11,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:54:11,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:54:11,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:54:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:54:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:54:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:54:11,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:54:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:54:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:54:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:54:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:54:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:54:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:54:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:54:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:54:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:54:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:54:12,575 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:54:12,575 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:54:12,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:12 BoogieIcfgContainer [2020-10-28 18:54:12,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:54:12,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:54:12,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:54:12,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:54:12,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:54:11" (1/3) ... [2020-10-28 18:54:12,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acd2196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:12, skipping insertion in model container [2020-10-28 18:54:12,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:11" (2/3) ... [2020-10-28 18:54:12,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2acd2196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:12, skipping insertion in model container [2020-10-28 18:54:12,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:12" (3/3) ... [2020-10-28 18:54:12,588 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-28 18:54:12,603 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:54:12,609 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:54:12,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:54:12,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:54:12,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:54:12,672 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:54:12,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:54:12,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:54:12,672 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:54:12,672 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:54:12,673 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:54:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-28 18:54:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 18:54:12,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:12,721 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] [2020-10-28 18:54:12,721 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:12,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1066806879, now seen corresponding path program 1 times [2020-10-28 18:54:12,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:12,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093367028] [2020-10-28 18:54:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:13,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:15,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:15,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 18:54:15,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:54:15,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2538 [2020-10-28 18:54:15,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:15,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:15,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:15,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 18:54:15,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 18:54:15,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:54:15,843 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:15,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:15,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:15,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:15,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:15,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 18:54:15,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:15,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:15,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:15,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:15,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:15,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:15,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093367028] [2020-10-28 18:54:15,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:15,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:15,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38927933] [2020-10-28 18:54:15,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:15,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:15,947 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2020-10-28 18:54:16,205 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:54:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:16,800 INFO L93 Difference]: Finished difference Result 212 states and 333 transitions. [2020-10-28 18:54:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:16,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-28 18:54:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:16,813 INFO L225 Difference]: With dead ends: 212 [2020-10-28 18:54:16,814 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 18:54:16,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 18:54:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 18:54:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 18:54:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 193 transitions. [2020-10-28 18:54:16,891 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 193 transitions. Word has length 42 [2020-10-28 18:54:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:16,891 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 193 transitions. [2020-10-28 18:54:16,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 193 transitions. [2020-10-28 18:54:16,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 18:54:16,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:16,894 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] [2020-10-28 18:54:16,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:54:16,894 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:16,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1166500177, now seen corresponding path program 1 times [2020-10-28 18:54:16,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:16,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327994684] [2020-10-28 18:54:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:16,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:16,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:17,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:17,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:17,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 18:54:17,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:54:17,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-28 18:54:17,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:17,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 18:54:17,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:54:17,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:17,831 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:17,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:17,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:17,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:17,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:54:17,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:17,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:17,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:17,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:17,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:17,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327994684] [2020-10-28 18:54:17,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:17,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120770610] [2020-10-28 18:54:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:17,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:17,866 INFO L87 Difference]: Start difference. First operand 131 states and 193 transitions. Second operand 4 states. [2020-10-28 18:54:18,036 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:54:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:18,614 INFO L93 Difference]: Finished difference Result 313 states and 479 transitions. [2020-10-28 18:54:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:18,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 18:54:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:18,618 INFO L225 Difference]: With dead ends: 313 [2020-10-28 18:54:18,618 INFO L226 Difference]: Without dead ends: 206 [2020-10-28 18:54:18,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-28 18:54:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-28 18:54:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 18:54:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 306 transitions. [2020-10-28 18:54:18,648 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 306 transitions. Word has length 43 [2020-10-28 18:54:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:18,649 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 306 transitions. [2020-10-28 18:54:18,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 306 transitions. [2020-10-28 18:54:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 18:54:18,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:18,652 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] [2020-10-28 18:54:18,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:54:18,652 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 554240064, now seen corresponding path program 1 times [2020-10-28 18:54:18,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:18,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045803613] [2020-10-28 18:54:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:18,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:18,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:19,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:19,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 18:54:19,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:54:19,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-28 18:54:19,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:19,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 18:54:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:54:19,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:19,266 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:19,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:19,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:19,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:19,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:19,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:54:19,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:19,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:19,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:19,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:19,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:19,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:19,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045803613] [2020-10-28 18:54:19,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:19,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:19,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664903379] [2020-10-28 18:54:19,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:19,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:19,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:19,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:19,298 INFO L87 Difference]: Start difference. First operand 203 states and 306 transitions. Second operand 4 states. [2020-10-28 18:54:19,479 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:54:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:19,853 INFO L93 Difference]: Finished difference Result 497 states and 766 transitions. [2020-10-28 18:54:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:19,854 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 18:54:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:19,859 INFO L225 Difference]: With dead ends: 497 [2020-10-28 18:54:19,859 INFO L226 Difference]: Without dead ends: 318 [2020-10-28 18:54:19,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-28 18:54:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 315. [2020-10-28 18:54:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-28 18:54:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 478 transitions. [2020-10-28 18:54:19,896 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 478 transitions. Word has length 44 [2020-10-28 18:54:19,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:19,897 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 478 transitions. [2020-10-28 18:54:19,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:19,897 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 478 transitions. [2020-10-28 18:54:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 18:54:19,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:19,899 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] [2020-10-28 18:54:19,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:54:19,899 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:19,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:19,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1266061178, now seen corresponding path program 1 times [2020-10-28 18:54:19,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:19,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731048868] [2020-10-28 18:54:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:19,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:19,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:20,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:20,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 18:54:20,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:54:20,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 654 [2020-10-28 18:54:20,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:20,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:54:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:54:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 18:54:20,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:20,791 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:20,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:20,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:20,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:20,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:20,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:54:20,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:20,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:20,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:20,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:20,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:20,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:20,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731048868] [2020-10-28 18:54:20,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:20,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:54:20,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234754568] [2020-10-28 18:54:20,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:54:20,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:54:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:20,826 INFO L87 Difference]: Start difference. First operand 315 states and 478 transitions. Second operand 6 states. [2020-10-28 18:54:21,058 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:54:21,661 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:54:21,875 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:54:21,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:21,965 INFO L93 Difference]: Finished difference Result 1479 states and 2294 transitions. [2020-10-28 18:54:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:54:21,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-28 18:54:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:21,974 INFO L225 Difference]: With dead ends: 1479 [2020-10-28 18:54:21,974 INFO L226 Difference]: Without dead ends: 1188 [2020-10-28 18:54:21,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:54:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2020-10-28 18:54:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 603. [2020-10-28 18:54:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-10-28 18:54:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 914 transitions. [2020-10-28 18:54:22,064 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 914 transitions. Word has length 45 [2020-10-28 18:54:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:22,065 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 914 transitions. [2020-10-28 18:54:22,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 914 transitions. [2020-10-28 18:54:22,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 18:54:22,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:22,067 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] [2020-10-28 18:54:22,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:54:22,067 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1167890461, now seen corresponding path program 1 times [2020-10-28 18:54:22,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:22,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729206268] [2020-10-28 18:54:22,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:22,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:22,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:22,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:22,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 18:54:22,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:54:22,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-28 18:54:22,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:22,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:54:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 18:54:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 18:54:22,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:22,802 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:22,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:22,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:22,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:22,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:22,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:22,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:54:22,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:22,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:22,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:22,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:22,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:22,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729206268] [2020-10-28 18:54:22,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:22,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:54:22,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254341590] [2020-10-28 18:54:22,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:54:22,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:54:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:22,855 INFO L87 Difference]: Start difference. First operand 603 states and 914 transitions. Second operand 6 states. [2020-10-28 18:54:23,445 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:54:23,653 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:54:23,859 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:54:24,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:24,362 INFO L93 Difference]: Finished difference Result 2076 states and 3152 transitions. [2020-10-28 18:54:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:54:24,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-28 18:54:24,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:24,372 INFO L225 Difference]: With dead ends: 2076 [2020-10-28 18:54:24,372 INFO L226 Difference]: Without dead ends: 1497 [2020-10-28 18:54:24,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:54:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-10-28 18:54:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1491. [2020-10-28 18:54:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2020-10-28 18:54:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2242 transitions. [2020-10-28 18:54:24,506 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2242 transitions. Word has length 46 [2020-10-28 18:54:24,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:24,507 INFO L481 AbstractCegarLoop]: Abstraction has 1491 states and 2242 transitions. [2020-10-28 18:54:24,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2242 transitions. [2020-10-28 18:54:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 18:54:24,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:24,511 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] [2020-10-28 18:54:24,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:54:24,512 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -254185062, now seen corresponding path program 1 times [2020-10-28 18:54:24,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:24,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99211552] [2020-10-28 18:54:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:24,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:24,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:24,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 18:54:24,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:54:24,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-28 18:54:24,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:24,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:54:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:24,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 18:54:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:25,227 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:25,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:25,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:25,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:25,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:25,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:25,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:54:25,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:25,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:25,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:25,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:25,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99211552] [2020-10-28 18:54:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:25,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:54:25,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313445708] [2020-10-28 18:54:25,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:54:25,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:54:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:25,286 INFO L87 Difference]: Start difference. First operand 1491 states and 2242 transitions. Second operand 6 states. [2020-10-28 18:54:25,494 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:54:26,166 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:54:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:26,388 INFO L93 Difference]: Finished difference Result 4385 states and 6598 transitions. [2020-10-28 18:54:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:54:26,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-28 18:54:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:26,405 INFO L225 Difference]: With dead ends: 4385 [2020-10-28 18:54:26,405 INFO L226 Difference]: Without dead ends: 2918 [2020-10-28 18:54:26,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:54:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-10-28 18:54:26,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2915. [2020-10-28 18:54:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2915 states. [2020-10-28 18:54:26,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 4338 transitions. [2020-10-28 18:54:26,662 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 4338 transitions. Word has length 48 [2020-10-28 18:54:26,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:26,662 INFO L481 AbstractCegarLoop]: Abstraction has 2915 states and 4338 transitions. [2020-10-28 18:54:26,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:54:26,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 4338 transitions. [2020-10-28 18:54:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 18:54:26,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:26,664 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] [2020-10-28 18:54:26,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:54:26,664 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:26,665 INFO L82 PathProgramCache]: Analyzing trace with hash 268846869, now seen corresponding path program 1 times [2020-10-28 18:54:26,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:26,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084904944] [2020-10-28 18:54:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:26,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:26,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:26,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 18:54:26,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:26,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 18:54:26,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:26,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:26,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:54:26,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 18:54:26,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:54:26,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:27,085 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:27,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:27,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:27,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:27,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:27,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:27,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:54:27,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:27,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:27,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:27,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:27,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084904944] [2020-10-28 18:54:27,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:27,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:54:27,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852701912] [2020-10-28 18:54:27,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:54:27,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:27,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:54:27,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:27,126 INFO L87 Difference]: Start difference. First operand 2915 states and 4338 transitions. Second operand 5 states. [2020-10-28 18:54:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:28,103 INFO L93 Difference]: Finished difference Result 5998 states and 8844 transitions. [2020-10-28 18:54:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:54:28,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-28 18:54:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:28,134 INFO L225 Difference]: With dead ends: 5998 [2020-10-28 18:54:28,135 INFO L226 Difference]: Without dead ends: 5995 [2020-10-28 18:54:28,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:54:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2020-10-28 18:54:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 3107. [2020-10-28 18:54:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3107 states. [2020-10-28 18:54:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 4530 transitions. [2020-10-28 18:54:28,474 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 4530 transitions. Word has length 48 [2020-10-28 18:54:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:28,475 INFO L481 AbstractCegarLoop]: Abstraction has 3107 states and 4530 transitions. [2020-10-28 18:54:28,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:54:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 4530 transitions. [2020-10-28 18:54:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 18:54:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:28,477 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] [2020-10-28 18:54:28,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:54:28,481 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 42346085, now seen corresponding path program 1 times [2020-10-28 18:54:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:28,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738729704] [2020-10-28 18:54:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:28,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:28,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 18:54:28,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:28,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-28 18:54:28,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:28,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:28,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:28,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:54:28,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:54:28,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:28,826 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:28,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:28,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:28,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:28,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:28,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:54:28,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:28,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:28,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:28,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:28,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:28,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:28,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738729704] [2020-10-28 18:54:28,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:28,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:28,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048291250] [2020-10-28 18:54:28,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:28,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:28,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:28,869 INFO L87 Difference]: Start difference. First operand 3107 states and 4530 transitions. Second operand 4 states. [2020-10-28 18:54:29,062 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:54:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:29,797 INFO L93 Difference]: Finished difference Result 6863 states and 9992 transitions. [2020-10-28 18:54:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:29,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-28 18:54:29,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:29,818 INFO L225 Difference]: With dead ends: 6863 [2020-10-28 18:54:29,818 INFO L226 Difference]: Without dead ends: 3780 [2020-10-28 18:54:29,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2020-10-28 18:54:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3777. [2020-10-28 18:54:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3777 states. [2020-10-28 18:54:30,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 5464 transitions. [2020-10-28 18:54:30,196 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 5464 transitions. Word has length 49 [2020-10-28 18:54:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:30,198 INFO L481 AbstractCegarLoop]: Abstraction has 3777 states and 5464 transitions. [2020-10-28 18:54:30,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 5464 transitions. [2020-10-28 18:54:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:54:30,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:30,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:30,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:54:30,204 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:30,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:30,204 INFO L82 PathProgramCache]: Analyzing trace with hash -682566351, now seen corresponding path program 1 times [2020-10-28 18:54:30,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:30,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000575913] [2020-10-28 18:54:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:30,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:32,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:32,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:54:32,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:54:32,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2268 [2020-10-28 18:54:32,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:32,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:32,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:54:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:54:32,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 18:54:32,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:32,751 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:32,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:32,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:32,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:32,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:32,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:32,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:54:32,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:32,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:32,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:32,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 18:54:32,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000575913] [2020-10-28 18:54:32,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:54:32,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 18:54:32,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095791673] [2020-10-28 18:54:32,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:54:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:32,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:54:32,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:32,823 INFO L87 Difference]: Start difference. First operand 3777 states and 5464 transitions. Second operand 5 states. [2020-10-28 18:54:33,024 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:54:33,639 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:54:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:34,158 INFO L93 Difference]: Finished difference Result 9434 states and 13666 transitions. [2020-10-28 18:54:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:54:34,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-28 18:54:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:34,192 INFO L225 Difference]: With dead ends: 9434 [2020-10-28 18:54:34,192 INFO L226 Difference]: Without dead ends: 6351 [2020-10-28 18:54:34,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:54:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2020-10-28 18:54:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6345. [2020-10-28 18:54:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6345 states. [2020-10-28 18:54:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 9068 transitions. [2020-10-28 18:54:34,813 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 9068 transitions. Word has length 66 [2020-10-28 18:54:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:34,813 INFO L481 AbstractCegarLoop]: Abstraction has 6345 states and 9068 transitions. [2020-10-28 18:54:34,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:54:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 9068 transitions. [2020-10-28 18:54:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:34,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:34,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:34,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:54:34,817 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:34,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash -32592006, now seen corresponding path program 1 times [2020-10-28 18:54:34,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:34,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751338311] [2020-10-28 18:54:34,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:35,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:36,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:36,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:36,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:54:36,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-10-28 18:54:36,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:36,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:54:36,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:54:36,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:36,818 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:36,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:36,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:36,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:36,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:36,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:54:36,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:36,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:36,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751338311] [2020-10-28 18:54:36,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:36,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:36,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010970536] [2020-10-28 18:54:36,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:36,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:36,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:36,858 INFO L87 Difference]: Start difference. First operand 6345 states and 9068 transitions. Second operand 4 states. [2020-10-28 18:54:37,070 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:54:38,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:38,044 INFO L93 Difference]: Finished difference Result 13918 states and 19815 transitions. [2020-10-28 18:54:38,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:38,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:54:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:38,081 INFO L225 Difference]: With dead ends: 13918 [2020-10-28 18:54:38,082 INFO L226 Difference]: Without dead ends: 9259 [2020-10-28 18:54:38,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9259 states. [2020-10-28 18:54:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9259 to 8710. [2020-10-28 18:54:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8710 states. [2020-10-28 18:54:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 12249 transitions. [2020-10-28 18:54:39,049 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 12249 transitions. Word has length 67 [2020-10-28 18:54:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:39,050 INFO L481 AbstractCegarLoop]: Abstraction has 8710 states and 12249 transitions. [2020-10-28 18:54:39,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 12249 transitions. [2020-10-28 18:54:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:39,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:39,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:39,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:54:39,055 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2055366417, now seen corresponding path program 1 times [2020-10-28 18:54:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:39,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572022865] [2020-10-28 18:54:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:39,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:39,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:41,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:44,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:44,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:44,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:54:44,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 18:54:44,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:44,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 18:54:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:54:44,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:44,358 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:44,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:44,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:44,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:44,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:44,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:54:44,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:44,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:44,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:44,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:44,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:44,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:44,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572022865] [2020-10-28 18:54:44,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:44,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:44,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067817114] [2020-10-28 18:54:44,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:44,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:44,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:44,406 INFO L87 Difference]: Start difference. First operand 8710 states and 12249 transitions. Second operand 4 states. [2020-10-28 18:54:44,611 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:54:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:45,769 INFO L93 Difference]: Finished difference Result 14745 states and 20568 transitions. [2020-10-28 18:54:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:45,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:54:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:45,790 INFO L225 Difference]: With dead ends: 14745 [2020-10-28 18:54:45,790 INFO L226 Difference]: Without dead ends: 9255 [2020-10-28 18:54:45,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2020-10-28 18:54:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 8853. [2020-10-28 18:54:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8853 states. [2020-10-28 18:54:46,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 12192 transitions. [2020-10-28 18:54:46,586 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 12192 transitions. Word has length 67 [2020-10-28 18:54:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:46,587 INFO L481 AbstractCegarLoop]: Abstraction has 8853 states and 12192 transitions. [2020-10-28 18:54:46,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:46,587 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 12192 transitions. [2020-10-28 18:54:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:46,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:46,591 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:46,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:54:46,591 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:46,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1445255943, now seen corresponding path program 1 times [2020-10-28 18:54:46,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:46,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001599578] [2020-10-28 18:54:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:51,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:51,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:51,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:54:51,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:54:51,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:51,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:54:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:51,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:54:51,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:52,002 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:52,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:52,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:52,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:52,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:52,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 18:54:52,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:52,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:52,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:52,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:52,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001599578] [2020-10-28 18:54:52,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:54:52,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:54:52,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551494235] [2020-10-28 18:54:52,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:54:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:54:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:54:52,118 INFO L87 Difference]: Start difference. First operand 8853 states and 12192 transitions. Second operand 8 states. [2020-10-28 18:54:52,416 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:54:53,522 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:54:53,840 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:54:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:54,544 INFO L93 Difference]: Finished difference Result 21754 states and 29697 transitions. [2020-10-28 18:54:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:54:54,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:54:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:54,581 INFO L225 Difference]: With dead ends: 21754 [2020-10-28 18:54:54,581 INFO L226 Difference]: Without dead ends: 12951 [2020-10-28 18:54:54,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:54:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2020-10-28 18:54:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 8975. [2020-10-28 18:54:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8975 states. [2020-10-28 18:54:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 12059 transitions. [2020-10-28 18:54:55,357 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 12059 transitions. Word has length 67 [2020-10-28 18:54:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:55,358 INFO L481 AbstractCegarLoop]: Abstraction has 8975 states and 12059 transitions. [2020-10-28 18:54:55,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:54:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 12059 transitions. [2020-10-28 18:54:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:54:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:55,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:55,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:54:55,363 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -333576509, now seen corresponding path program 1 times [2020-10-28 18:54:55,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:55,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268752854] [2020-10-28 18:54:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:56,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:58,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:54:58,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:54:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2837 [2020-10-28 18:54:58,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:58,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:54:58,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 18:54:58,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:58,664 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:54:58,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:58,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:58,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:58,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:58,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:54:58,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:58,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:58,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:58,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:58,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:58,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:58,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268752854] [2020-10-28 18:54:58,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:54:58,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:54:58,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483300519] [2020-10-28 18:54:58,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:54:58,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:54:58,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:54:58,762 INFO L87 Difference]: Start difference. First operand 8975 states and 12059 transitions. Second operand 8 states. [2020-10-28 18:54:59,004 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:55:00,167 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:55:00,437 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:55:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:01,774 INFO L93 Difference]: Finished difference Result 29815 states and 40016 transitions. [2020-10-28 18:55:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:01,775 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:55:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:01,813 INFO L225 Difference]: With dead ends: 29815 [2020-10-28 18:55:01,813 INFO L226 Difference]: Without dead ends: 20872 [2020-10-28 18:55:01,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20872 states. [2020-10-28 18:55:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20872 to 11078. [2020-10-28 18:55:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11078 states. [2020-10-28 18:55:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 14712 transitions. [2020-10-28 18:55:03,135 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 14712 transitions. Word has length 67 [2020-10-28 18:55:03,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:03,135 INFO L481 AbstractCegarLoop]: Abstraction has 11078 states and 14712 transitions. [2020-10-28 18:55:03,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 14712 transitions. [2020-10-28 18:55:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:55:03,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:03,140 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:03,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:55:03,142 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:03,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:03,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1946086804, now seen corresponding path program 1 times [2020-10-28 18:55:03,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:03,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165564092] [2020-10-28 18:55:03,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:03,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:03,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:03,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:05,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:05,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:55:05,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:05,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-28 18:55:05,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:05,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:55:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:06,052 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:55:06,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:06,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:06,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:06,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:06,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:06,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:55:06,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:06,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:06,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:06,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:06,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165564092] [2020-10-28 18:55:06,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:55:06,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:55:06,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34961630] [2020-10-28 18:55:06,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:06,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:06,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:06,120 INFO L87 Difference]: Start difference. First operand 11078 states and 14712 transitions. Second operand 8 states. [2020-10-28 18:55:06,323 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:55:07,354 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:55:07,660 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:55:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:09,413 INFO L93 Difference]: Finished difference Result 34039 states and 44856 transitions. [2020-10-28 18:55:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:09,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-10-28 18:55:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:09,467 INFO L225 Difference]: With dead ends: 34039 [2020-10-28 18:55:09,467 INFO L226 Difference]: Without dead ends: 23014 [2020-10-28 18:55:09,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23014 states. [2020-10-28 18:55:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23014 to 13742. [2020-10-28 18:55:11,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13742 states. [2020-10-28 18:55:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13742 states to 13742 states and 18021 transitions. [2020-10-28 18:55:11,073 INFO L78 Accepts]: Start accepts. Automaton has 13742 states and 18021 transitions. Word has length 67 [2020-10-28 18:55:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:11,073 INFO L481 AbstractCegarLoop]: Abstraction has 13742 states and 18021 transitions. [2020-10-28 18:55:11,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13742 states and 18021 transitions. [2020-10-28 18:55:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 18:55:11,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:11,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:11,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:55:11,078 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1151741868, now seen corresponding path program 1 times [2020-10-28 18:55:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598475721] [2020-10-28 18:55:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:11,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:11,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 18:55:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:55:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:55:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:16,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:55:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 18:55:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:16,304 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:55:16,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:16,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:16,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:16,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:16,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:55:16,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:16,338 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:16,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:16,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:16,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598475721] [2020-10-28 18:55:16,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:16,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:16,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453673383] [2020-10-28 18:55:16,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:16,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:16,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:16,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:16,359 INFO L87 Difference]: Start difference. First operand 13742 states and 18021 transitions. Second operand 4 states. [2020-10-28 18:55:16,553 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-28 18:55:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:18,721 INFO L93 Difference]: Finished difference Result 31140 states and 40997 transitions. [2020-10-28 18:55:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:18,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-28 18:55:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:18,756 INFO L225 Difference]: With dead ends: 31140 [2020-10-28 18:55:18,756 INFO L226 Difference]: Without dead ends: 20683 [2020-10-28 18:55:18,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:55:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20683 states. [2020-10-28 18:55:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20683 to 20623. [2020-10-28 18:55:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20623 states. [2020-10-28 18:55:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20623 states to 20623 states and 26889 transitions. [2020-10-28 18:55:20,770 INFO L78 Accepts]: Start accepts. Automaton has 20623 states and 26889 transitions. Word has length 67 [2020-10-28 18:55:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:20,771 INFO L481 AbstractCegarLoop]: Abstraction has 20623 states and 26889 transitions. [2020-10-28 18:55:20,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 20623 states and 26889 transitions. [2020-10-28 18:55:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:55:20,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:20,780 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:20,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:55:20,783 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:20,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1821705519, now seen corresponding path program 1 times [2020-10-28 18:55:20,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:20,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849951781] [2020-10-28 18:55:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:20,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:21,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:21,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:21,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:25,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:25,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:55:25,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:55:25,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:26,026 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:55:26,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:26,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:26,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:26,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:26,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:55:26,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849951781] [2020-10-28 18:55:26,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:55:26,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:55:26,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168914135] [2020-10-28 18:55:26,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:26,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:26,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:26,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:26,051 INFO L87 Difference]: Start difference. First operand 20623 states and 26889 transitions. Second operand 6 states. [2020-10-28 18:55:26,285 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:55:27,187 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:55:29,480 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:55:29,694 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:55:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:31,297 INFO L93 Difference]: Finished difference Result 52927 states and 70007 transitions. [2020-10-28 18:55:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:55:31,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:55:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:31,348 INFO L225 Difference]: With dead ends: 52927 [2020-10-28 18:55:31,348 INFO L226 Difference]: Without dead ends: 42829 [2020-10-28 18:55:31,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:55:31,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42829 states. [2020-10-28 18:55:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42829 to 32332. [2020-10-28 18:55:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32332 states. [2020-10-28 18:55:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32332 states to 32332 states and 42102 transitions. [2020-10-28 18:55:34,696 INFO L78 Accepts]: Start accepts. Automaton has 32332 states and 42102 transitions. Word has length 69 [2020-10-28 18:55:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:34,696 INFO L481 AbstractCegarLoop]: Abstraction has 32332 states and 42102 transitions. [2020-10-28 18:55:34,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:55:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32332 states and 42102 transitions. [2020-10-28 18:55:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:55:34,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:34,703 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:34,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:55:34,703 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1655096418, now seen corresponding path program 1 times [2020-10-28 18:55:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:34,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796115429] [2020-10-28 18:55:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:34,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:34,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:34,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:34,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:35,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:35,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:39,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:55:39,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:55:39,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:55:39,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:39,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:39,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:55:39,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:55:39,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:39,994 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:55:39,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:40,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:40,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:40,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:40,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:40,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:55:40,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:40,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:40,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:40,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 18:55:40,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796115429] [2020-10-28 18:55:40,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:55:40,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:55:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245878296] [2020-10-28 18:55:40,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:40,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:40,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:40,038 INFO L87 Difference]: Start difference. First operand 32332 states and 42102 transitions. Second operand 6 states. [2020-10-28 18:55:40,247 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:55:41,101 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:55:43,580 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:55:43,937 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:55:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:45,853 INFO L93 Difference]: Finished difference Result 61384 states and 80378 transitions. [2020-10-28 18:55:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:55:45,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:55:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:45,910 INFO L225 Difference]: With dead ends: 61384 [2020-10-28 18:55:45,910 INFO L226 Difference]: Without dead ends: 49281 [2020-10-28 18:55:45,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:55:45,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49281 states. [2020-10-28 18:55:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49281 to 33725. [2020-10-28 18:55:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33725 states. [2020-10-28 18:55:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33725 states to 33725 states and 43926 transitions. [2020-10-28 18:55:49,656 INFO L78 Accepts]: Start accepts. Automaton has 33725 states and 43926 transitions. Word has length 69 [2020-10-28 18:55:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:49,657 INFO L481 AbstractCegarLoop]: Abstraction has 33725 states and 43926 transitions. [2020-10-28 18:55:49,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:55:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33725 states and 43926 transitions. [2020-10-28 18:55:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:55:49,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:49,668 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:49,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:55:49,668 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash -622547069, now seen corresponding path program 1 times [2020-10-28 18:55:49,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:49,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933145768] [2020-10-28 18:55:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:49,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:49,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:49,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:54,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:55:54,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:55:54,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:55:54,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:54,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:55:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:55:54,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:54,913 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:55:54,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:54,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:54,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:54,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:55:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933145768] [2020-10-28 18:55:54,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:55:54,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:55:54,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263224700] [2020-10-28 18:55:54,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:54,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:54,941 INFO L87 Difference]: Start difference. First operand 33725 states and 43926 transitions. Second operand 6 states. [2020-10-28 18:55:55,162 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:55:55,984 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:55:58,282 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:55:58,467 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-28 18:56:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:00,699 INFO L93 Difference]: Finished difference Result 59298 states and 77490 transitions. [2020-10-28 18:56:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:56:00,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 18:56:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:00,755 INFO L225 Difference]: With dead ends: 59298 [2020-10-28 18:56:00,755 INFO L226 Difference]: Without dead ends: 48105 [2020-10-28 18:56:00,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:56:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48105 states. [2020-10-28 18:56:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48105 to 39524. [2020-10-28 18:56:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39524 states. [2020-10-28 18:56:04,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39524 states to 39524 states and 51455 transitions. [2020-10-28 18:56:04,953 INFO L78 Accepts]: Start accepts. Automaton has 39524 states and 51455 transitions. Word has length 69 [2020-10-28 18:56:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:04,954 INFO L481 AbstractCegarLoop]: Abstraction has 39524 states and 51455 transitions. [2020-10-28 18:56:04,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:04,954 INFO L276 IsEmpty]: Start isEmpty. Operand 39524 states and 51455 transitions. [2020-10-28 18:56:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:56:04,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:04,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:04,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:56:04,960 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1302117065, now seen corresponding path program 1 times [2020-10-28 18:56:04,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:04,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140551015] [2020-10-28 18:56:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:04,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:10,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:10,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:56:10,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:10,239 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:56:10,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:10,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:10,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:10,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:10,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:56:10,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:10,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:10,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140551015] [2020-10-28 18:56:10,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:56:10,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:56:10,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981246441] [2020-10-28 18:56:10,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:10,264 INFO L87 Difference]: Start difference. First operand 39524 states and 51455 transitions. Second operand 6 states. [2020-10-28 18:56:10,451 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:56:11,861 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-28 18:56:12,375 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-28 18:56:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:29,010 INFO L93 Difference]: Finished difference Result 201827 states and 262096 transitions. [2020-10-28 18:56:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:56:29,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:56:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:29,373 INFO L225 Difference]: With dead ends: 201827 [2020-10-28 18:56:29,374 INFO L226 Difference]: Without dead ends: 162386 [2020-10-28 18:56:29,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:56:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162386 states. [2020-10-28 18:56:42,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162386 to 116367. [2020-10-28 18:56:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116367 states. [2020-10-28 18:56:42,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116367 states to 116367 states and 151228 transitions. [2020-10-28 18:56:42,261 INFO L78 Accepts]: Start accepts. Automaton has 116367 states and 151228 transitions. Word has length 74 [2020-10-28 18:56:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:42,261 INFO L481 AbstractCegarLoop]: Abstraction has 116367 states and 151228 transitions. [2020-10-28 18:56:42,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 116367 states and 151228 transitions. [2020-10-28 18:56:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:56:42,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:42,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:42,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:56:42,270 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1676889151, now seen corresponding path program 1 times [2020-10-28 18:56:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:42,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409216497] [2020-10-28 18:56:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:42,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:44,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:47,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:47,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:56:47,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:56:47,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:56:47,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:47,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:47,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:56:47,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:47,507 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:56:47,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:47,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:47,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:47,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:47,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:47,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:56:47,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:47,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:47,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:47,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:47,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:47,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:56:47,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409216497] [2020-10-28 18:56:47,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:47,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:56:47,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278135164] [2020-10-28 18:56:47,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:47,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:47,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:47,553 INFO L87 Difference]: Start difference. First operand 116367 states and 151228 transitions. Second operand 6 states. [2020-10-28 18:56:47,763 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:56:48,829 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:57:00,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:00,675 INFO L93 Difference]: Finished difference Result 201492 states and 262286 transitions. [2020-10-28 18:57:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:00,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:57:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:00,847 INFO L225 Difference]: With dead ends: 201492 [2020-10-28 18:57:00,847 INFO L226 Difference]: Without dead ends: 111755 [2020-10-28 18:57:01,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:57:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111755 states. [2020-10-28 18:57:10,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111755 to 84914. [2020-10-28 18:57:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84914 states. [2020-10-28 18:57:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84914 states to 84914 states and 110184 transitions. [2020-10-28 18:57:10,851 INFO L78 Accepts]: Start accepts. Automaton has 84914 states and 110184 transitions. Word has length 74 [2020-10-28 18:57:10,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:10,851 INFO L481 AbstractCegarLoop]: Abstraction has 84914 states and 110184 transitions. [2020-10-28 18:57:10,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 84914 states and 110184 transitions. [2020-10-28 18:57:10,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:57:10,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:10,858 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:10,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:57:10,859 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:10,859 INFO L82 PathProgramCache]: Analyzing trace with hash 216840754, now seen corresponding path program 1 times [2020-10-28 18:57:10,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:10,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362928768] [2020-10-28 18:57:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:11,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:11,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:11,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:11,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:11,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:12,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:15,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:15,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:57:15,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:57:15,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:57:15,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:15,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:15,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:15,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:15,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:57:15,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:16,071 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-28 18:57:16,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:16,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:16,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:16,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:16,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:16,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:57:16,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:16,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:16,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:16,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:57:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362928768] [2020-10-28 18:57:16,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:16,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:16,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283127094] [2020-10-28 18:57:16,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:16,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:16,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:16,104 INFO L87 Difference]: Start difference. First operand 84914 states and 110184 transitions. Second operand 6 states. [2020-10-28 18:57:16,331 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:57:17,333 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-28 18:57:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:29,279 INFO L93 Difference]: Finished difference Result 195020 states and 253201 transitions. [2020-10-28 18:57:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:29,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:57:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:29,440 INFO L225 Difference]: With dead ends: 195020 [2020-10-28 18:57:29,440 INFO L226 Difference]: Without dead ends: 110165 [2020-10-28 18:57:29,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:57:29,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110165 states. [2020-10-28 18:57:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110165 to 109758. [2020-10-28 18:57:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109758 states. [2020-10-28 18:57:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109758 states to 109758 states and 140754 transitions. [2020-10-28 18:57:42,417 INFO L78 Accepts]: Start accepts. Automaton has 109758 states and 140754 transitions. Word has length 74 [2020-10-28 18:57:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:42,418 INFO L481 AbstractCegarLoop]: Abstraction has 109758 states and 140754 transitions. [2020-10-28 18:57:42,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 109758 states and 140754 transitions. [2020-10-28 18:57:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:57:42,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:42,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:42,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:57:42,424 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:42,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1482671319, now seen corresponding path program 1 times [2020-10-28 18:57:42,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:42,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323520371] [2020-10-28 18:57:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:42,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:42,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:42,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking...