/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_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:15:50,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:15:50,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:15:50,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:15:50,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:15:50,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:15:50,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:15:50,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:15:50,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:15:50,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:15:50,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:15:50,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:15:50,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:15:50,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:15:50,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:15:50,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:15:50,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:15:50,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:15:50,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:15:50,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:15:50,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:15:50,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:15:50,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:15:50,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:15:50,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:15:50,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:15:50,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:15:50,668 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:15:50,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:15:50,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:15:50,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:15:50,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:15:50,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:15:50,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:15:50,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:15:50,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:15:50,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:15:50,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:15:50,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:15:50,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:15:50,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:15:50,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:15:50,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:15:50,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:15:50,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:15:50,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:15:50,760 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:15:50,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:15:50,761 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:15:50,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:15:50,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:15:50,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:15:50,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:15:50,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:15:50,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:15:50,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:15:50,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:15:50,764 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:15:50,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:15:50,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:15:50,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:15:50,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:15:50,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:15:50,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:15:50,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:15:50,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:15:50,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:15:50,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:15:50,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:15:50,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:15:50,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:15:50,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:15:51,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:15:51,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:15:51,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:15:51,176 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:15:51,177 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:15:51,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:15:51,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f19c1860/02a27c577856413ab1111b13f7294efa/FLAGbd02b6c96 [2020-10-28 18:15:52,089 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:15:52,090 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:15:52,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f19c1860/02a27c577856413ab1111b13f7294efa/FLAGbd02b6c96 [2020-10-28 18:15:52,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f19c1860/02a27c577856413ab1111b13f7294efa [2020-10-28 18:15:52,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:15:52,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:15:52,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:52,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:15:52,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:15:52,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:52" (1/1) ... [2020-10-28 18:15:52,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be2397f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:52, skipping insertion in model container [2020-10-28 18:15:52,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:15:52" (1/1) ... [2020-10-28 18:15:52,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:15:52,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:15:53,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:53,242 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:15:53,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:15:53,599 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:15:53,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53 WrapperNode [2020-10-28 18:15:53,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:15:53,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:15:53,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:15:53,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:15:53,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... [2020-10-28 18:15:53,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:15:53,814 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:15:53,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:15:53,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:15:53,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:15:53,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:15:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:15:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:15:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:15:53,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:15:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:15:53,896 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:15:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:15:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:15:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:15:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:15:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:15:53,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:15:53,898 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:15:53,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:15:53,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:15:56,907 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:15:56,907 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:15:56,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:56 BoogieIcfgContainer [2020-10-28 18:15:56,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:15:56,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:15:56,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:15:56,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:15:56,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:15:52" (1/3) ... [2020-10-28 18:15:56,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc30ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:56, skipping insertion in model container [2020-10-28 18:15:56,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:15:53" (2/3) ... [2020-10-28 18:15:56,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc30ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:15:56, skipping insertion in model container [2020-10-28 18:15:56,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:15:56" (3/3) ... [2020-10-28 18:15:56,919 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:15:56,931 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:15:56,937 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:15:56,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:15:56,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:15:56,982 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:15:56,983 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:15:56,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:15:56,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:15:56,983 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:15:56,983 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:15:56,983 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:15:57,013 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states. [2020-10-28 18:15:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-28 18:15:57,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:15:57,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:15:57,045 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:15:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:15:57,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1910831309, now seen corresponding path program 1 times [2020-10-28 18:15:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:15:57,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783816740] [2020-10-28 18:15:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:15:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:15:58,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:58,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:59,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:15:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:00,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:00,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:01,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:03,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:03,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-28 18:16:03,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:16:03,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:16:03,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:03,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:03,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:03,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:03,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-28 18:16:03,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:16:03,549 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2020-10-28 18:16:04,720 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:16:04,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:04,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:04,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:04,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:04,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:04,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 18:16:04,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:04,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:04,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:04,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:04,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:04,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783816740] [2020-10-28 18:16:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:05,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:05,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494460967] [2020-10-28 18:16:05,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:05,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:05,207 INFO L87 Difference]: Start difference. First operand 622 states. Second operand 5 states. [2020-10-28 18:16:13,719 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:16:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:15,898 INFO L93 Difference]: Finished difference Result 1799 states and 3231 transitions. [2020-10-28 18:16:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:16:15,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2020-10-28 18:16:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:15,930 INFO L225 Difference]: With dead ends: 1799 [2020-10-28 18:16:15,931 INFO L226 Difference]: Without dead ends: 1202 [2020-10-28 18:16:15,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2020-10-28 18:16:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1177. [2020-10-28 18:16:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1177 states. [2020-10-28 18:16:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1839 transitions. [2020-10-28 18:16:16,123 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1839 transitions. Word has length 236 [2020-10-28 18:16:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:16,124 INFO L481 AbstractCegarLoop]: Abstraction has 1177 states and 1839 transitions. [2020-10-28 18:16:16,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1839 transitions. [2020-10-28 18:16:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-28 18:16:16,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:16,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:16,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:16:16,134 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:16,135 INFO L82 PathProgramCache]: Analyzing trace with hash 580240098, now seen corresponding path program 1 times [2020-10-28 18:16:16,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:16,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108201871] [2020-10-28 18:16:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:16,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:17,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:17,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:19,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:21,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:21,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-28 18:16:21,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:16:21,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:16:21,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:21,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:16:21,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:16:21,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-28 18:16:21,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:22,647 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:16:22,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:22,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:22,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:22,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:22,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:16:22,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:22,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:22,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:22,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:16:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108201871] [2020-10-28 18:16:22,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:22,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:16:22,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230459995] [2020-10-28 18:16:22,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:16:22,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:22,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:16:22,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:16:22,866 INFO L87 Difference]: Start difference. First operand 1177 states and 1839 transitions. Second operand 4 states. [2020-10-28 18:16:30,645 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 303 [2020-10-28 18:16:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:32,600 INFO L93 Difference]: Finished difference Result 3331 states and 5167 transitions. [2020-10-28 18:16:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:16:32,606 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 238 [2020-10-28 18:16:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:32,618 INFO L225 Difference]: With dead ends: 3331 [2020-10-28 18:16:32,619 INFO L226 Difference]: Without dead ends: 2298 [2020-10-28 18:16:32,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:32,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2020-10-28 18:16:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2275. [2020-10-28 18:16:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-10-28 18:16:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3537 transitions. [2020-10-28 18:16:32,775 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3537 transitions. Word has length 238 [2020-10-28 18:16:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:32,776 INFO L481 AbstractCegarLoop]: Abstraction has 2275 states and 3537 transitions. [2020-10-28 18:16:32,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:16:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3537 transitions. [2020-10-28 18:16:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-28 18:16:32,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:32,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:32,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:16:32,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1491234137, now seen corresponding path program 1 times [2020-10-28 18:16:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:32,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158992914] [2020-10-28 18:16:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:32,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:32,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:33,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:34,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:37,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:37,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-28 18:16:37,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:16:37,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 18:16:37,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:37,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-28 18:16:37,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:39,288 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:16:39,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:39,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:39,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:39,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:39,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:39,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:16:39,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:39,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:39,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:39,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:39,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158992914] [2020-10-28 18:16:39,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:39,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:39,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547144284] [2020-10-28 18:16:39,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:39,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:39,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:39,477 INFO L87 Difference]: Start difference. First operand 2275 states and 3537 transitions. Second operand 5 states. [2020-10-28 18:16:46,137 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:16:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:16:48,155 INFO L93 Difference]: Finished difference Result 6587 states and 10201 transitions. [2020-10-28 18:16:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:16:48,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2020-10-28 18:16:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:16:48,177 INFO L225 Difference]: With dead ends: 6587 [2020-10-28 18:16:48,178 INFO L226 Difference]: Without dead ends: 4347 [2020-10-28 18:16:48,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:16:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2020-10-28 18:16:48,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4291. [2020-10-28 18:16:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4291 states. [2020-10-28 18:16:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 6589 transitions. [2020-10-28 18:16:48,417 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 6589 transitions. Word has length 238 [2020-10-28 18:16:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:16:48,417 INFO L481 AbstractCegarLoop]: Abstraction has 4291 states and 6589 transitions. [2020-10-28 18:16:48,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:16:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 6589 transitions. [2020-10-28 18:16:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 18:16:48,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:16:48,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:16:48,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:16:48,429 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:16:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:16:48,430 INFO L82 PathProgramCache]: Analyzing trace with hash 124895454, now seen corresponding path program 1 times [2020-10-28 18:16:48,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:16:48,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894590481] [2020-10-28 18:16:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:16:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:48,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:48,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:48,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:49,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:50,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:50,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:50,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:53,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:53,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-28 18:16:53,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:16:53,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 18:16:53,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:53,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:16:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:16:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-28 18:16:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:54,834 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:16:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:16:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:16:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:16:54,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:16:54,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:16:54,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:16:54,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:16:54,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:16:54,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:16:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:16:54,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:16:54,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:16:54,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:16:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:16:55,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894590481] [2020-10-28 18:16:55,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:16:55,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:16:55,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094361501] [2020-10-28 18:16:55,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:16:55,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:16:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:16:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:16:55,064 INFO L87 Difference]: Start difference. First operand 4291 states and 6589 transitions. Second operand 5 states. [2020-10-28 18:17:02,320 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:17:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:04,548 INFO L93 Difference]: Finished difference Result 12573 states and 19264 transitions. [2020-10-28 18:17:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:04,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2020-10-28 18:17:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:04,587 INFO L225 Difference]: With dead ends: 12573 [2020-10-28 18:17:04,587 INFO L226 Difference]: Without dead ends: 8441 [2020-10-28 18:17:04,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8441 states. [2020-10-28 18:17:05,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8441 to 8424. [2020-10-28 18:17:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8424 states. [2020-10-28 18:17:05,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8424 states to 8424 states and 12855 transitions. [2020-10-28 18:17:05,108 INFO L78 Accepts]: Start accepts. Automaton has 8424 states and 12855 transitions. Word has length 240 [2020-10-28 18:17:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:05,110 INFO L481 AbstractCegarLoop]: Abstraction has 8424 states and 12855 transitions. [2020-10-28 18:17:05,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 8424 states and 12855 transitions. [2020-10-28 18:17:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-28 18:17:05,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:05,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:05,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:17:05,129 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:05,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1593001871, now seen corresponding path program 1 times [2020-10-28 18:17:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:05,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307311365] [2020-10-28 18:17:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:05,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:05,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:08,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:09,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:10,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:10,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-28 18:17:10,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:17:10,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:17:10,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:10,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:10,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 18:17:10,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:17:11,530 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:17:11,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:11,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:11,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:11,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:11,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:17:11,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:11,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:11,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:11,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:11,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307311365] [2020-10-28 18:17:11,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:11,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:11,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235364117] [2020-10-28 18:17:11,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:11,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:11,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:11,738 INFO L87 Difference]: Start difference. First operand 8424 states and 12855 transitions. Second operand 5 states. [2020-10-28 18:17:18,594 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:17:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:20,663 INFO L93 Difference]: Finished difference Result 18130 states and 27653 transitions. [2020-10-28 18:17:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:20,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 242 [2020-10-28 18:17:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:20,708 INFO L225 Difference]: With dead ends: 18130 [2020-10-28 18:17:20,709 INFO L226 Difference]: Without dead ends: 9892 [2020-10-28 18:17:20,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9892 states. [2020-10-28 18:17:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9892 to 8580. [2020-10-28 18:17:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8580 states. [2020-10-28 18:17:21,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8580 states to 8580 states and 13107 transitions. [2020-10-28 18:17:21,282 INFO L78 Accepts]: Start accepts. Automaton has 8580 states and 13107 transitions. Word has length 242 [2020-10-28 18:17:21,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:21,282 INFO L481 AbstractCegarLoop]: Abstraction has 8580 states and 13107 transitions. [2020-10-28 18:17:21,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 8580 states and 13107 transitions. [2020-10-28 18:17:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-28 18:17:21,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:21,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:21,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:17:21,303 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1712941702, now seen corresponding path program 1 times [2020-10-28 18:17:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:21,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500295730] [2020-10-28 18:17:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:21,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:21,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:23,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:26,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:26,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-28 18:17:26,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:17:26,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:17:26,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:26,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:26,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:26,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-28 18:17:26,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:27,700 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:17:27,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:27,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:27,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:27,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:27,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:27,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:17:27,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:27,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:27,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:27,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:27,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:27,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:27,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500295730] [2020-10-28 18:17:27,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:27,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307097544] [2020-10-28 18:17:27,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:27,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:27,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:27,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:27,842 INFO L87 Difference]: Start difference. First operand 8580 states and 13107 transitions. Second operand 5 states. [2020-10-28 18:17:35,454 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:17:37,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:37,924 INFO L93 Difference]: Finished difference Result 24432 states and 37085 transitions. [2020-10-28 18:17:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:37,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 244 [2020-10-28 18:17:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:37,962 INFO L225 Difference]: With dead ends: 24432 [2020-10-28 18:17:37,962 INFO L226 Difference]: Without dead ends: 16570 [2020-10-28 18:17:37,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2020-10-28 18:17:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 16436. [2020-10-28 18:17:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16436 states. [2020-10-28 18:17:38,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16436 states to 16436 states and 24879 transitions. [2020-10-28 18:17:38,981 INFO L78 Accepts]: Start accepts. Automaton has 16436 states and 24879 transitions. Word has length 244 [2020-10-28 18:17:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:38,981 INFO L481 AbstractCegarLoop]: Abstraction has 16436 states and 24879 transitions. [2020-10-28 18:17:38,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:38,981 INFO L276 IsEmpty]: Start isEmpty. Operand 16436 states and 24879 transitions. [2020-10-28 18:17:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-28 18:17:39,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:39,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:39,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:17:39,012 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:39,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1468738586, now seen corresponding path program 1 times [2020-10-28 18:17:39,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:39,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621987238] [2020-10-28 18:17:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:39,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:39,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:44,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:44,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 18:17:44,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:17:44,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:17:44,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:44,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:17:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:17:44,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 18:17:44,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:45,563 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:17:45,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:17:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:45,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:45,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:17:45,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:17:45,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:17:45,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:17:45,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:17:45,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:17:45,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:17:45,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:17:45,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:17:45,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:17:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:17:45,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621987238] [2020-10-28 18:17:45,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:17:45,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:17:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370267368] [2020-10-28 18:17:45,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:17:45,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:17:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:17:45,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:17:45,757 INFO L87 Difference]: Start difference. First operand 16436 states and 24879 transitions. Second operand 5 states. [2020-10-28 18:17:54,273 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:17:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:17:57,004 INFO L93 Difference]: Finished difference Result 48032 states and 72553 transitions. [2020-10-28 18:17:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:17:57,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 246 [2020-10-28 18:17:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:17:57,070 INFO L225 Difference]: With dead ends: 48032 [2020-10-28 18:17:57,070 INFO L226 Difference]: Without dead ends: 32122 [2020-10-28 18:17:57,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:17:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32122 states. [2020-10-28 18:17:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32122 to 31988. [2020-10-28 18:17:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31988 states. [2020-10-28 18:17:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31988 states to 31988 states and 48035 transitions. [2020-10-28 18:17:59,391 INFO L78 Accepts]: Start accepts. Automaton has 31988 states and 48035 transitions. Word has length 246 [2020-10-28 18:17:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:17:59,392 INFO L481 AbstractCegarLoop]: Abstraction has 31988 states and 48035 transitions. [2020-10-28 18:17:59,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:17:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 31988 states and 48035 transitions. [2020-10-28 18:17:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-28 18:17:59,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:17:59,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:17:59,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:17:59,444 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:17:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:17:59,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1466687987, now seen corresponding path program 1 times [2020-10-28 18:17:59,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:17:59,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233449519] [2020-10-28 18:17:59,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:17:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:17:59,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:17:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:03,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:04,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:04,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 256 [2020-10-28 18:18:04,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:18:04,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:18:04,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:04,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-28 18:18:04,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:05,751 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:18:05,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:05,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:05,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:05,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:05,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:05,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:05,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233449519] [2020-10-28 18:18:05,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:05,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696918997] [2020-10-28 18:18:05,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:05,853 INFO L87 Difference]: Start difference. First operand 31988 states and 48035 transitions. Second operand 5 states. [2020-10-28 18:18:15,409 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:18:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:18,646 INFO L93 Difference]: Finished difference Result 93086 states and 139301 transitions. [2020-10-28 18:18:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:18,647 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2020-10-28 18:18:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:18,774 INFO L225 Difference]: With dead ends: 93086 [2020-10-28 18:18:18,774 INFO L226 Difference]: Without dead ends: 62316 [2020-10-28 18:18:18,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62316 states. [2020-10-28 18:18:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62316 to 62292. [2020-10-28 18:18:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62292 states. [2020-10-28 18:18:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62292 states to 62292 states and 92599 transitions. [2020-10-28 18:18:23,550 INFO L78 Accepts]: Start accepts. Automaton has 62292 states and 92599 transitions. Word has length 248 [2020-10-28 18:18:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:23,550 INFO L481 AbstractCegarLoop]: Abstraction has 62292 states and 92599 transitions. [2020-10-28 18:18:23,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 62292 states and 92599 transitions. [2020-10-28 18:18:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-28 18:18:23,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:23,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:18:23,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:18:23,602 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1648161949, now seen corresponding path program 1 times [2020-10-28 18:18:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:23,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463003723] [2020-10-28 18:18:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:23,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:28,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-28 18:18:28,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:29,973 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:18:29,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:18:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:29,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:18:29,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:18:29,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:18:29,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:18:29,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:18:29,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:18:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:18:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:18:29,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:18:29,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:18:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:18:30,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463003723] [2020-10-28 18:18:30,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:18:30,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:18:30,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464711796] [2020-10-28 18:18:30,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:18:30,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:18:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:18:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:18:30,103 INFO L87 Difference]: Start difference. First operand 62292 states and 92599 transitions. Second operand 5 states. [2020-10-28 18:18:43,814 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 304 [2020-10-28 18:18:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:18:48,978 INFO L93 Difference]: Finished difference Result 181240 states and 268323 transitions. [2020-10-28 18:18:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:18:48,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2020-10-28 18:18:48,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:18:49,177 INFO L225 Difference]: With dead ends: 181240 [2020-10-28 18:18:49,178 INFO L226 Difference]: Without dead ends: 121670 [2020-10-28 18:18:49,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:18:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121670 states. [2020-10-28 18:18:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121670 to 121655. [2020-10-28 18:18:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121655 states. [2020-10-28 18:18:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121655 states to 121655 states and 179263 transitions. [2020-10-28 18:18:59,424 INFO L78 Accepts]: Start accepts. Automaton has 121655 states and 179263 transitions. Word has length 250 [2020-10-28 18:18:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:18:59,424 INFO L481 AbstractCegarLoop]: Abstraction has 121655 states and 179263 transitions. [2020-10-28 18:18:59,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:18:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 121655 states and 179263 transitions. [2020-10-28 18:18:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-28 18:18:59,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:18:59,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:18:59,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:18:59,818 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:18:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:18:59,819 INFO L82 PathProgramCache]: Analyzing trace with hash 599222411, now seen corresponding path program 1 times [2020-10-28 18:18:59,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:18:59,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212247711] [2020-10-28 18:18:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:18:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:18:59,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:59,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:18:59,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:00,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:04,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:19:04,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:06,184 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 18:19:06,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:06,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:06,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:06,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:06,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:06,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:19:06,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:06,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:06,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:19:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:19:06,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212247711] [2020-10-28 18:19:06,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:06,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:19:06,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129990359] [2020-10-28 18:19:06,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:19:06,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:19:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:06,282 INFO L87 Difference]: Start difference. First operand 121655 states and 179263 transitions. Second operand 5 states. [2020-10-28 18:19:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:32,051 INFO L93 Difference]: Finished difference Result 340311 states and 499132 transitions. [2020-10-28 18:19:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:32,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 252 [2020-10-28 18:19:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:32,593 INFO L225 Difference]: With dead ends: 340311 [2020-10-28 18:19:32,593 INFO L226 Difference]: Without dead ends: 228483 [2020-10-28 18:19:32,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:19:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228483 states.