/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.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:07:43,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:07:43,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:07:43,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:07:43,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:07:43,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:07:43,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:07:43,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:07:43,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:07:43,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:07:43,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:07:43,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:07:43,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:07:43,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:07:43,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:07:43,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:07:43,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:07:43,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:07:43,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:07:43,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:07:43,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:07:43,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:07:43,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:07:43,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:07:43,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:07:43,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:07:43,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:07:43,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:07:43,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:07:43,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:07:43,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:07:43,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:07:43,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:07:43,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:07:43,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:07:43,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:07:43,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:07:43,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:07:43,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:07:43,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:07:43,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:07:43,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:07:43,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:07:43,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:07:43,773 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:07:43,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:07:43,774 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:07:43,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:07:43,774 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:07:43,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:07:43,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:07:43,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:07:43,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:07:43,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:07:43,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:07:43,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:07:43,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:07:43,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:07:43,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:07:43,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:07:43,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:07:43,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:07:43,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:07:43,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:07:43,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:07:43,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:07:43,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:07:43,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:07:43,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:07:43,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:07:43,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:07:43,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:07:44,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:07:44,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:07:44,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:07:44,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:07:44,280 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:07:44,285 INFO L432 ainManager$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.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 19:07:44,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00be370c3/7ea203f36d7644099f8b13623f682b49/FLAG3cf0ef7a9 [2020-10-28 19:07:45,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:07:45,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 19:07:45,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00be370c3/7ea203f36d7644099f8b13623f682b49/FLAG3cf0ef7a9 [2020-10-28 19:07:45,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/00be370c3/7ea203f36d7644099f8b13623f682b49 [2020-10-28 19:07:45,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:07:45,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:07:45,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:07:45,462 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:07:45,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:07:45,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:45,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45, skipping insertion in model container [2020-10-28 19:07:45,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:45,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:07:45,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:07:45,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:07:45,849 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:07:45,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:07:45,984 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:07:45,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45 WrapperNode [2020-10-28 19:07:45,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:07:45,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:07:45,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:07:45,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:07:46,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... [2020-10-28 19:07:46,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:07:46,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:07:46,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:07:46,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:07:46,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:07:46,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:07:46,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:07:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:07:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:07:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:07:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:07:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:07:46,139 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:07:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:07:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:07:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:07:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:07:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:07:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:07:46,141 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:07:46,141 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:07:46,141 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:07:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:07:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:07:46,154 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:07:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 19:07:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:07:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:07:46,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:07:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:07:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:07:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:07:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:07:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:07:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:07:47,005 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:07:47,006 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:07:47,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:07:47 BoogieIcfgContainer [2020-10-28 19:07:47,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:07:47,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:07:47,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:07:47,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:07:47,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:07:45" (1/3) ... [2020-10-28 19:07:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea8a173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:07:47, skipping insertion in model container [2020-10-28 19:07:47,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:45" (2/3) ... [2020-10-28 19:07:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea8a173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:07:47, skipping insertion in model container [2020-10-28 19:07:47,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:07:47" (3/3) ... [2020-10-28 19:07:47,018 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-28 19:07:47,033 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:07:47,039 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:07:47,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:07:47,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:07:47,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:07:47,086 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:07:47,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:07:47,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:07:47,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:07:47,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:07:47,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:07:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states. [2020-10-28 19:07:47,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:07:47,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:47,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:07:47,126 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2126985342, now seen corresponding path program 1 times [2020-10-28 19:07:47,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:47,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479561660] [2020-10-28 19:07:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:47,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:48,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:49,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:52,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:52,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:52,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:07:52,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:07:52,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 19:07:52,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:52,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:52,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:07:52,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 19:07:52,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:07:52,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 19:07:53,029 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:07:53,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:07:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:53,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:53,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:53,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:07:53,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:07:53,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 19:07:53,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:53,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:53,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:07:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:07:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:07:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:07:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:07:53,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479561660] [2020-10-28 19:07:53,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:07:53,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:07:53,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592215421] [2020-10-28 19:07:53,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:07:53,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:07:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:07:53,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:07:53,214 INFO L87 Difference]: Start difference. First operand 172 states. Second operand 4 states. [2020-10-28 19:07:53,660 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:07:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:07:54,699 INFO L93 Difference]: Finished difference Result 398 states and 642 transitions. [2020-10-28 19:07:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:07:54,700 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-28 19:07:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:07:54,714 INFO L225 Difference]: With dead ends: 398 [2020-10-28 19:07:54,714 INFO L226 Difference]: Without dead ends: 266 [2020-10-28 19:07:54,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:07:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-28 19:07:54,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-10-28 19:07:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 19:07:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 391 transitions. [2020-10-28 19:07:54,789 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 391 transitions. Word has length 78 [2020-10-28 19:07:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:07:54,790 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 391 transitions. [2020-10-28 19:07:54,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:07:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 391 transitions. [2020-10-28 19:07:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:07:54,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:54,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:07:54,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:07:54,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash 244228026, now seen corresponding path program 1 times [2020-10-28 19:07:54,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807023636] [2020-10-28 19:07:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:54,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:54,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:54,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:55,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:57,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:59,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:07:59,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:07:59,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 19:07:59,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 19:07:59,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:07:59,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:07:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:07:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 19:07:59,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 19:07:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:08:00,210 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:00,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:00,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:00,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:00,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:00,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:00,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:08:00,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:00,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:00,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:00,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:00,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807023636] [2020-10-28 19:08:00,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:00,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:00,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444781064] [2020-10-28 19:08:00,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:00,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:00,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:00,290 INFO L87 Difference]: Start difference. First operand 263 states and 391 transitions. Second operand 4 states. [2020-10-28 19:08:00,659 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:01,968 INFO L93 Difference]: Finished difference Result 661 states and 1025 transitions. [2020-10-28 19:08:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:01,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-28 19:08:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:01,982 INFO L225 Difference]: With dead ends: 661 [2020-10-28 19:08:01,982 INFO L226 Difference]: Without dead ends: 446 [2020-10-28 19:08:01,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-28 19:08:02,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 443. [2020-10-28 19:08:02,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-28 19:08:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 678 transitions. [2020-10-28 19:08:02,067 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 678 transitions. Word has length 79 [2020-10-28 19:08:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:02,068 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 678 transitions. [2020-10-28 19:08:02,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 678 transitions. [2020-10-28 19:08:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 19:08:02,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:02,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:02,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:08:02,077 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1931457877, now seen corresponding path program 1 times [2020-10-28 19:08:02,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:02,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401866142] [2020-10-28 19:08:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:02,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:02,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:02,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:02,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:06,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:06,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 19:08:06,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:06,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4628 [2020-10-28 19:08:06,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:06,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 19:08:06,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:08:06,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:08:07,075 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:07,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:07,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:07,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:07,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:07,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:07,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:07,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401866142] [2020-10-28 19:08:07,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:07,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:07,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688463037] [2020-10-28 19:08:07,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:07,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:07,148 INFO L87 Difference]: Start difference. First operand 443 states and 678 transitions. Second operand 4 states. [2020-10-28 19:08:07,439 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:08,321 INFO L93 Difference]: Finished difference Result 1169 states and 1834 transitions. [2020-10-28 19:08:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:08,326 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-28 19:08:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:08,333 INFO L225 Difference]: With dead ends: 1169 [2020-10-28 19:08:08,333 INFO L226 Difference]: Without dead ends: 774 [2020-10-28 19:08:08,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:08,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-28 19:08:08,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 771. [2020-10-28 19:08:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-28 19:08:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1198 transitions. [2020-10-28 19:08:08,402 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1198 transitions. Word has length 80 [2020-10-28 19:08:08,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:08,406 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1198 transitions. [2020-10-28 19:08:08,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1198 transitions. [2020-10-28 19:08:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 19:08:08,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:08,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:08,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:08:08,421 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash -858429798, now seen corresponding path program 1 times [2020-10-28 19:08:08,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:08,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935705192] [2020-10-28 19:08:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:08,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:08,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:08,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:08,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:10,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:10,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 19:08:10,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 19:08:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2298 [2020-10-28 19:08:10,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:10,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 19:08:10,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 19:08:10,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:11,083 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:11,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:11,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:11,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:11,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:11,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:08:11,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:11,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:11,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:11,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:11,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935705192] [2020-10-28 19:08:11,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:11,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:11,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252243855] [2020-10-28 19:08:11,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:11,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:11,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:11,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:11,135 INFO L87 Difference]: Start difference. First operand 771 states and 1198 transitions. Second operand 4 states. [2020-10-28 19:08:11,438 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:12,604 INFO L93 Difference]: Finished difference Result 2089 states and 3290 transitions. [2020-10-28 19:08:12,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:12,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 19:08:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:12,614 INFO L225 Difference]: With dead ends: 2089 [2020-10-28 19:08:12,614 INFO L226 Difference]: Without dead ends: 1366 [2020-10-28 19:08:12,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2020-10-28 19:08:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1363. [2020-10-28 19:08:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2020-10-28 19:08:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2130 transitions. [2020-10-28 19:08:12,702 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2130 transitions. Word has length 81 [2020-10-28 19:08:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:12,702 INFO L481 AbstractCegarLoop]: Abstraction has 1363 states and 2130 transitions. [2020-10-28 19:08:12,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2130 transitions. [2020-10-28 19:08:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 19:08:12,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:12,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:12,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:08:12,704 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1321339412, now seen corresponding path program 1 times [2020-10-28 19:08:12,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:12,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868167014] [2020-10-28 19:08:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:13,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:13,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:13,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 19:08:13,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:08:13,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1229 [2020-10-28 19:08:13,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:13,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 19:08:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:08:13,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:14,264 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:14,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:14,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:14,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:14,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:14,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:14,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:08:14,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:14,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:14,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:14,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:14,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:08:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:14,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868167014] [2020-10-28 19:08:14,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:14,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:14,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632564652] [2020-10-28 19:08:14,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:14,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:14,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:14,329 INFO L87 Difference]: Start difference. First operand 1363 states and 2130 transitions. Second operand 4 states. [2020-10-28 19:08:14,685 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:15,665 INFO L93 Difference]: Finished difference Result 3737 states and 5878 transitions. [2020-10-28 19:08:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:15,665 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 19:08:15,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:15,681 INFO L225 Difference]: With dead ends: 3737 [2020-10-28 19:08:15,681 INFO L226 Difference]: Without dead ends: 2422 [2020-10-28 19:08:15,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:15,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2020-10-28 19:08:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2419. [2020-10-28 19:08:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2419 states. [2020-10-28 19:08:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 3778 transitions. [2020-10-28 19:08:15,836 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 3778 transitions. Word has length 82 [2020-10-28 19:08:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:15,838 INFO L481 AbstractCegarLoop]: Abstraction has 2419 states and 3778 transitions. [2020-10-28 19:08:15,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 3778 transitions. [2020-10-28 19:08:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 19:08:15,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:15,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:15,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:08:15,840 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1773318630, now seen corresponding path program 1 times [2020-10-28 19:08:15,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:15,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389428844] [2020-10-28 19:08:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:15,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:16,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:16,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:16,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 19:08:16,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:16,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-28 19:08:16,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:16,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 19:08:16,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 19:08:16,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:16,925 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:16,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:16,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:16,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:16,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:08:16,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:16,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:16,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:16,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:16,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:16,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:08:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:16,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389428844] [2020-10-28 19:08:16,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:16,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:16,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273375729] [2020-10-28 19:08:16,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:16,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:16,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:16,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:16,991 INFO L87 Difference]: Start difference. First operand 2419 states and 3778 transitions. Second operand 4 states. [2020-10-28 19:08:17,280 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:18,428 INFO L93 Difference]: Finished difference Result 6649 states and 10406 transitions. [2020-10-28 19:08:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:18,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 19:08:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:18,451 INFO L225 Difference]: With dead ends: 6649 [2020-10-28 19:08:18,452 INFO L226 Difference]: Without dead ends: 4278 [2020-10-28 19:08:18,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2020-10-28 19:08:18,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 4275. [2020-10-28 19:08:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4275 states. [2020-10-28 19:08:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 6642 transitions. [2020-10-28 19:08:18,734 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 6642 transitions. Word has length 83 [2020-10-28 19:08:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:18,734 INFO L481 AbstractCegarLoop]: Abstraction has 4275 states and 6642 transitions. [2020-10-28 19:08:18,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 6642 transitions. [2020-10-28 19:08:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 19:08:18,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:18,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:18,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:08:18,736 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash -924761921, now seen corresponding path program 1 times [2020-10-28 19:08:18,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:18,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560046455] [2020-10-28 19:08:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:18,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:19,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:20,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:20,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 19:08:20,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:20,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1793 [2020-10-28 19:08:20,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:20,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:20,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 19:08:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:08:20,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 19:08:20,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:21,014 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:21,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:21,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:21,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:21,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:21,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:21,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:08:21,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:21,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:21,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:21,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:21,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:21,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560046455] [2020-10-28 19:08:21,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:21,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 19:08:21,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17563800] [2020-10-28 19:08:21,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 19:08:21,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:21,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 19:08:21,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 19:08:21,087 INFO L87 Difference]: Start difference. First operand 4275 states and 6642 transitions. Second operand 9 states. [2020-10-28 19:08:21,473 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-28 19:08:22,890 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:08:23,259 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 19:08:23,583 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:23,828 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:24,077 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:25,248 INFO L93 Difference]: Finished difference Result 33864 states and 52800 transitions. [2020-10-28 19:08:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:08:25,248 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-28 19:08:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:25,399 INFO L225 Difference]: With dead ends: 33864 [2020-10-28 19:08:25,399 INFO L226 Difference]: Without dead ends: 29637 [2020-10-28 19:08:25,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-28 19:08:25,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29637 states. [2020-10-28 19:08:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29637 to 8499. [2020-10-28 19:08:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8499 states. [2020-10-28 19:08:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8499 states to 8499 states and 13106 transitions. [2020-10-28 19:08:26,440 INFO L78 Accepts]: Start accepts. Automaton has 8499 states and 13106 transitions. Word has length 84 [2020-10-28 19:08:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:26,440 INFO L481 AbstractCegarLoop]: Abstraction has 8499 states and 13106 transitions. [2020-10-28 19:08:26,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 19:08:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8499 states and 13106 transitions. [2020-10-28 19:08:26,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 19:08:26,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:26,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:26,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:08:26,442 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:26,443 INFO L82 PathProgramCache]: Analyzing trace with hash 822277756, now seen corresponding path program 1 times [2020-10-28 19:08:26,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:26,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364435410] [2020-10-28 19:08:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:26,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:27,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:27,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 19:08:27,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:08:27,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:27,558 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-10-28 19:08:27,851 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:27,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:27,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:27,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:27,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:27,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 19:08:27,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:27,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:27,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:27,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:27,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:27,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:27,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364435410] [2020-10-28 19:08:27,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:27,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:08:27,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795139258] [2020-10-28 19:08:27,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:08:27,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:08:27,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:27,968 INFO L87 Difference]: Start difference. First operand 8499 states and 13106 transitions. Second operand 5 states. [2020-10-28 19:08:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:30,325 INFO L93 Difference]: Finished difference Result 17206 states and 26420 transitions. [2020-10-28 19:08:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:08:30,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-28 19:08:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:30,366 INFO L225 Difference]: With dead ends: 17206 [2020-10-28 19:08:30,366 INFO L226 Difference]: Without dead ends: 17203 [2020-10-28 19:08:30,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:08:30,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17203 states. [2020-10-28 19:08:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17203 to 8755. [2020-10-28 19:08:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8755 states. [2020-10-28 19:08:31,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8755 states to 8755 states and 13362 transitions. [2020-10-28 19:08:31,238 INFO L78 Accepts]: Start accepts. Automaton has 8755 states and 13362 transitions. Word has length 85 [2020-10-28 19:08:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:31,238 INFO L481 AbstractCegarLoop]: Abstraction has 8755 states and 13362 transitions. [2020-10-28 19:08:31,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:08:31,238 INFO L276 IsEmpty]: Start isEmpty. Operand 8755 states and 13362 transitions. [2020-10-28 19:08:31,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 19:08:31,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:31,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:31,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:08:31,240 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:31,241 INFO L82 PathProgramCache]: Analyzing trace with hash 18660240, now seen corresponding path program 1 times [2020-10-28 19:08:31,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:31,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135185388] [2020-10-28 19:08:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:32,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:32,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 19:08:32,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:32,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-28 19:08:32,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:32,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:08:32,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 19:08:32,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:32,597 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:32,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:32,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:32,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:32,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:32,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:32,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135185388] [2020-10-28 19:08:32,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:32,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640621843] [2020-10-28 19:08:32,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:32,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:32,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:32,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:32,648 INFO L87 Difference]: Start difference. First operand 8755 states and 13362 transitions. Second operand 4 states. [2020-10-28 19:08:32,915 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:08:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:34,524 INFO L93 Difference]: Finished difference Result 21883 states and 33432 transitions. [2020-10-28 19:08:34,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:34,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-28 19:08:34,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:34,559 INFO L225 Difference]: With dead ends: 21883 [2020-10-28 19:08:34,559 INFO L226 Difference]: Without dead ends: 13176 [2020-10-28 19:08:34,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13176 states. [2020-10-28 19:08:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13176 to 13173. [2020-10-28 19:08:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13173 states. [2020-10-28 19:08:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13173 states to 13173 states and 20052 transitions. [2020-10-28 19:08:36,095 INFO L78 Accepts]: Start accepts. Automaton has 13173 states and 20052 transitions. Word has length 86 [2020-10-28 19:08:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:36,095 INFO L481 AbstractCegarLoop]: Abstraction has 13173 states and 20052 transitions. [2020-10-28 19:08:36,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13173 states and 20052 transitions. [2020-10-28 19:08:36,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 19:08:36,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:36,105 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:36,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:08:36,106 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:36,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:36,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1335788231, now seen corresponding path program 1 times [2020-10-28 19:08:36,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:36,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710812390] [2020-10-28 19:08:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:36,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:36,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:37,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:37,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 19:08:37,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:37,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-10-28 19:08:37,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:37,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:37,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:08:37,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:08:37,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-28 19:08:37,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:37,688 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:37,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:37,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:37,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:37,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:37,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:37,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:08:37,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:37,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:37,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:37,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:37,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:08:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 19:08:37,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710812390] [2020-10-28 19:08:37,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 19:08:37,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 19:08:37,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991286719] [2020-10-28 19:08:37,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:08:37,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:37,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:08:37,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:37,786 INFO L87 Difference]: Start difference. First operand 13173 states and 20052 transitions. Second operand 5 states. [2020-10-28 19:08:38,104 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 19:08:39,429 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-28 19:08:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:40,373 INFO L93 Difference]: Finished difference Result 30334 states and 46298 transitions. [2020-10-28 19:08:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:08:40,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2020-10-28 19:08:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:40,424 INFO L225 Difference]: With dead ends: 30334 [2020-10-28 19:08:40,425 INFO L226 Difference]: Without dead ends: 21627 [2020-10-28 19:08:40,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:08:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21627 states. [2020-10-28 19:08:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21627 to 21621. [2020-10-28 19:08:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21621 states. [2020-10-28 19:08:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21621 states to 21621 states and 32852 transitions. [2020-10-28 19:08:42,253 INFO L78 Accepts]: Start accepts. Automaton has 21621 states and 32852 transitions. Word has length 115 [2020-10-28 19:08:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:42,253 INFO L481 AbstractCegarLoop]: Abstraction has 21621 states and 32852 transitions. [2020-10-28 19:08:42,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:08:42,253 INFO L276 IsEmpty]: Start isEmpty. Operand 21621 states and 32852 transitions. [2020-10-28 19:08:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 19:08:42,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:42,262 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:42,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:08:42,262 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -968296477, now seen corresponding path program 1 times [2020-10-28 19:08:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:42,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275099569] [2020-10-28 19:08:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:42,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:42,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:42,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:42,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:47,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:47,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 19:08:47,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:47,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:08:47,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:47,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:47,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-28 19:08:47,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 19:08:47,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:08:47,612 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:47,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:47,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:47,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:47,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:47,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:47,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275099569] [2020-10-28 19:08:47,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:47,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:47,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004205464] [2020-10-28 19:08:47,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:47,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:47,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:47,661 INFO L87 Difference]: Start difference. First operand 21621 states and 32852 transitions. Second operand 4 states. [2020-10-28 19:08:47,980 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:08:50,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:50,980 INFO L93 Difference]: Finished difference Result 63003 states and 95576 transitions. [2020-10-28 19:08:50,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:50,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 19:08:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:51,061 INFO L225 Difference]: With dead ends: 63003 [2020-10-28 19:08:51,062 INFO L226 Difference]: Without dead ends: 41432 [2020-10-28 19:08:51,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41432 states. [2020-10-28 19:08:54,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41432 to 41429. [2020-10-28 19:08:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41429 states. [2020-10-28 19:08:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41429 states to 41429 states and 62452 transitions. [2020-10-28 19:08:54,417 INFO L78 Accepts]: Start accepts. Automaton has 41429 states and 62452 transitions. Word has length 116 [2020-10-28 19:08:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:54,417 INFO L481 AbstractCegarLoop]: Abstraction has 41429 states and 62452 transitions. [2020-10-28 19:08:54,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 41429 states and 62452 transitions. [2020-10-28 19:08:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 19:08:54,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:54,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:54,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:08:54,431 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1192192036, now seen corresponding path program 1 times [2020-10-28 19:08:54,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:54,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88471830] [2020-10-28 19:08:54,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:54,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:55,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:59,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:59,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 19:08:59,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:59,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:08:59,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:59,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 19:08:59,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 19:08:59,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:59,759 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:08:59,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:59,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:59,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:59,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:59,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:59,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:59,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88471830] [2020-10-28 19:08:59,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:59,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484004745] [2020-10-28 19:08:59,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:59,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:59,813 INFO L87 Difference]: Start difference. First operand 41429 states and 62452 transitions. Second operand 4 states. [2020-10-28 19:09:00,121 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:05,511 INFO L93 Difference]: Finished difference Result 120667 states and 181496 transitions. [2020-10-28 19:09:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:05,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 19:09:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:05,638 INFO L225 Difference]: With dead ends: 120667 [2020-10-28 19:09:05,638 INFO L226 Difference]: Without dead ends: 79288 [2020-10-28 19:09:05,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79288 states. [2020-10-28 19:09:11,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79288 to 79285. [2020-10-28 19:09:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79285 states. [2020-10-28 19:09:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79285 states to 79285 states and 118452 transitions. [2020-10-28 19:09:11,647 INFO L78 Accepts]: Start accepts. Automaton has 79285 states and 118452 transitions. Word has length 116 [2020-10-28 19:09:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:11,647 INFO L481 AbstractCegarLoop]: Abstraction has 79285 states and 118452 transitions. [2020-10-28 19:09:11,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 79285 states and 118452 transitions. [2020-10-28 19:09:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 19:09:11,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:11,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:11,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:09:11,672 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1014816837, now seen corresponding path program 1 times [2020-10-28 19:09:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:11,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939509880] [2020-10-28 19:09:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:11,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:11,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:12,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:12,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:12,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:16,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:16,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 19:09:16,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:16,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:09:16,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:16,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:16,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:16,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-28 19:09:16,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 19:09:16,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:17,018 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:17,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:17,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:17,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:17,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:17,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:17,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:09:17,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:17,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:17,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:17,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939509880] [2020-10-28 19:09:17,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:17,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:17,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199925092] [2020-10-28 19:09:17,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:17,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:17,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:17,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:17,062 INFO L87 Difference]: Start difference. First operand 79285 states and 118452 transitions. Second operand 4 states. [2020-10-28 19:09:17,368 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:09:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:28,290 INFO L93 Difference]: Finished difference Result 230715 states and 343736 transitions. [2020-10-28 19:09:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:09:28,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 19:09:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:28,631 INFO L225 Difference]: With dead ends: 230715 [2020-10-28 19:09:28,631 INFO L226 Difference]: Without dead ends: 151480 [2020-10-28 19:09:28,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:09:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151480 states. [2020-10-28 19:09:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151480 to 151477. [2020-10-28 19:09:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151477 states. [2020-10-28 19:09:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151477 states to 151477 states and 224052 transitions. [2020-10-28 19:09:39,688 INFO L78 Accepts]: Start accepts. Automaton has 151477 states and 224052 transitions. Word has length 116 [2020-10-28 19:09:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:39,689 INFO L481 AbstractCegarLoop]: Abstraction has 151477 states and 224052 transitions. [2020-10-28 19:09:39,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 151477 states and 224052 transitions. [2020-10-28 19:09:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 19:09:39,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:39,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:39,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:09:39,712 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash -220471901, now seen corresponding path program 1 times [2020-10-28 19:09:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:39,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991544086] [2020-10-28 19:09:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:40,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:40,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:40,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:44,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 19:09:44,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:45,051 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:09:45,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:45,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:45,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:45,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:45,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:09:45,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:45,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:09:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:09:45,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:45,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991544086] [2020-10-28 19:09:45,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:45,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:09:45,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679553144] [2020-10-28 19:09:45,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:09:45,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:45,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:09:45,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:09:45,104 INFO L87 Difference]: Start difference. First operand 151477 states and 224052 transitions. Second operand 4 states. [2020-10-28 19:09:45,427 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-28 19:10:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:05,182 INFO L93 Difference]: Finished difference Result 440251 states and 649016 transitions. [2020-10-28 19:10:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:10:05,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-10-28 19:10:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:05,914 INFO L225 Difference]: With dead ends: 440251 [2020-10-28 19:10:05,914 INFO L226 Difference]: Without dead ends: 288824 [2020-10-28 19:10:06,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:10:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288824 states. [2020-10-28 19:10:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288824 to 288821. [2020-10-28 19:10:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288821 states. [2020-10-28 19:10:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288821 states to 288821 states and 422452 transitions. [2020-10-28 19:10:27,598 INFO L78 Accepts]: Start accepts. Automaton has 288821 states and 422452 transitions. Word has length 116 [2020-10-28 19:10:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:27,599 INFO L481 AbstractCegarLoop]: Abstraction has 288821 states and 422452 transitions. [2020-10-28 19:10:27,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:10:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 288821 states and 422452 transitions. [2020-10-28 19:10:27,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-28 19:10:27,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:27,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:27,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:10:27,633 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1729448504, now seen corresponding path program 1 times [2020-10-28 19:10:27,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:27,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107982662] [2020-10-28 19:10:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:27,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:27,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:28,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:29,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 19:10:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:32,990 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-28 19:10:32,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:33,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:33,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:33,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:33,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:33,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:10:33,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:33,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:10:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:33,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:10:33,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:33,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107982662] [2020-10-28 19:10:33,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:33,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:10:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044819631] [2020-10-28 19:10:33,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:10:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:10:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:10:33,035 INFO L87 Difference]: Start difference. First operand 288821 states and 422452 transitions. Second operand 4 states. [2020-10-28 19:10:33,337 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 203