/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_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:23:43,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:23:43,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:23:43,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:23:43,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:23:43,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:23:43,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:23:43,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:23:43,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:23:43,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:23:43,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:23:43,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:23:43,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:23:43,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:23:43,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:23:43,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:23:43,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:23:43,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:23:43,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:23:43,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:23:43,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:23:43,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:23:43,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:23:43,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:23:43,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:23:43,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:23:43,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:23:43,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:23:43,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:23:43,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:23:43,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:23:43,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:23:43,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:23:43,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:23:43,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:23:43,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:23:43,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:23:43,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:23:43,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:23:43,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:23:43,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:23:43,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:23:43,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:23:43,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:23:43,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:23:43,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:23:43,846 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:23:43,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:23:43,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:23:43,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:23:43,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:23:43,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:23:43,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:23:43,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:23:43,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:23:43,848 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:23:43,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:23:43,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:23:43,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:23:43,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:23:43,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:23:43,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:23:43,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:23:43,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:23:43,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:23:43,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:23:43,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:23:43,851 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:23:43,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:23:43,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:23:43,851 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:23:43,851 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:23:44,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:23:44,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:23:44,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:23:44,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:23:44,268 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:23:44,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:23:44,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9558df72c/f83368a6a6614f30a9dd78e0e40c6aa7/FLAG0bd42c4cb [2020-10-28 19:23:45,313 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:23:45,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:23:45,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9558df72c/f83368a6a6614f30a9dd78e0e40c6aa7/FLAG0bd42c4cb [2020-10-28 19:23:45,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9558df72c/f83368a6a6614f30a9dd78e0e40c6aa7 [2020-10-28 19:23:45,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:23:45,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:23:45,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:23:45,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:23:45,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:23:45,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:23:45" (1/1) ... [2020-10-28 19:23:45,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6accb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:45, skipping insertion in model container [2020-10-28 19:23:45,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:23:45" (1/1) ... [2020-10-28 19:23:45,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:23:45,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:23:46,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:23:46,971 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:23:47,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:23:47,476 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:23:47,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47 WrapperNode [2020-10-28 19:23:47,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:23:47,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:23:47,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:23:47,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:23:47,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... [2020-10-28 19:23:47,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:23:47,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:23:47,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:23:47,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:23:47,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:23:47,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:23:47,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:23:47,758 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:23:47,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:23:47,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:23:47,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:23:47,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:23:47,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:23:47,759 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:23:47,760 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:23:47,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:23:51,619 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:23:51,620 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:23:51,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:23:51 BoogieIcfgContainer [2020-10-28 19:23:51,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:23:51,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:23:51,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:23:51,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:23:51,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:23:45" (1/3) ... [2020-10-28 19:23:51,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7648b0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:23:51, skipping insertion in model container [2020-10-28 19:23:51,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:23:47" (2/3) ... [2020-10-28 19:23:51,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7648b0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:23:51, skipping insertion in model container [2020-10-28 19:23:51,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:23:51" (3/3) ... [2020-10-28 19:23:51,639 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:23:51,653 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:23:51,665 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:23:51,681 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:23:51,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:23:51,717 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:23:51,717 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:23:51,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:23:51,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:23:51,717 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:23:51,718 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:23:51,718 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:23:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-10-28 19:23:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:23:51,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:51,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:23:51,804 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-10-28 19:23:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:51,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607168153] [2020-10-28 19:23:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:52,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:53,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:53,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:54,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:54,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:55,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:56,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:56,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:57,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:57,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:57,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:57,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:23:57,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:23:57,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-28 19:23:57,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:57,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:23:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:23:57,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 19:23:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:23:59,057 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:23:59,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:59,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:59,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:59,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:59,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:59,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 19:23:59,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:59,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:59,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:59,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:59,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:23:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:23:59,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607168153] [2020-10-28 19:23:59,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:59,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:23:59,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724408609] [2020-10-28 19:23:59,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:23:59,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:23:59,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:23:59,443 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-10-28 19:24:00,908 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:24:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:08,226 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-10-28 19:24:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:08,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:24:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:08,280 INFO L225 Difference]: With dead ends: 1496 [2020-10-28 19:24:08,280 INFO L226 Difference]: Without dead ends: 1286 [2020-10-28 19:24:08,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-28 19:24:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-28 19:24:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-28 19:24:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-10-28 19:24:08,445 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-10-28 19:24:08,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:08,452 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-10-28 19:24:08,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-10-28 19:24:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:24:08,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:08,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:08,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:24:08,472 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-10-28 19:24:08,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:08,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510688459] [2020-10-28 19:24:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:08,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:08,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:09,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:09,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:09,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:10,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:10,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:10,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:10,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:11,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:11,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:13,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:13,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:24:13,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:13,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 19:24:13,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:13,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 19:24:13,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-28 19:24:13,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:15,062 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:15,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:15,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:15,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:15,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:15,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:15,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:24:15,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:15,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:15,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:15,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:15,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:15,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:15,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510688459] [2020-10-28 19:24:15,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:15,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:15,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667458789] [2020-10-28 19:24:15,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:15,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:15,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:15,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:15,414 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-10-28 19:24:16,855 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:24:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:23,244 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-10-28 19:24:23,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:23,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:24:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:23,260 INFO L225 Difference]: With dead ends: 2615 [2020-10-28 19:24:23,260 INFO L226 Difference]: Without dead ends: 2250 [2020-10-28 19:24:23,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-28 19:24:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-10-28 19:24:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-10-28 19:24:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-10-28 19:24:23,372 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-10-28 19:24:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:23,373 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-10-28 19:24:23,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:23,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-10-28 19:24:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:24:23,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:23,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:23,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:24:23,385 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:23,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:23,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-10-28 19:24:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:23,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358960623] [2020-10-28 19:24:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:23,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:24,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:25,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:26,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:28,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:28,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:24:28,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:24:28,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:28,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 19:24:28,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-28 19:24:28,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:24:30,029 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:30,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:30,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:30,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:30,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:30,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:30,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:24:30,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:30,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:30,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:30,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:30,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358960623] [2020-10-28 19:24:30,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:30,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:30,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411640928] [2020-10-28 19:24:30,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:30,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:30,294 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-10-28 19:24:31,717 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:24:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:37,905 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-10-28 19:24:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:37,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:24:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:37,931 INFO L225 Difference]: With dead ends: 4825 [2020-10-28 19:24:37,931 INFO L226 Difference]: Without dead ends: 4142 [2020-10-28 19:24:37,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-10-28 19:24:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-10-28 19:24:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-10-28 19:24:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-10-28 19:24:38,079 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-10-28 19:24:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:38,080 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-10-28 19:24:38,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-10-28 19:24:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:24:38,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:38,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:38,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:24:38,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:38,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-10-28 19:24:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:38,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822385772] [2020-10-28 19:24:38,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:38,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:38,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:39,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:39,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:39,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:40,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:41,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:43,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:43,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:24:43,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:24:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 19:24:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:43,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:24:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 19:24:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-28 19:24:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:44,793 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:24:44,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:24:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:44,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:44,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:44,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:24:44,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:24:44,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 19:24:44,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:44,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:44,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:24:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:24:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:24:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:24:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:24:44,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822385772] [2020-10-28 19:24:44,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:24:44,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:24:44,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074983764] [2020-10-28 19:24:44,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:24:44,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:24:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:24:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:24:44,976 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-10-28 19:24:46,447 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:24:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:24:52,843 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-10-28 19:24:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:24:52,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:24:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:24:52,885 INFO L225 Difference]: With dead ends: 9129 [2020-10-28 19:24:52,885 INFO L226 Difference]: Without dead ends: 7854 [2020-10-28 19:24:52,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:24:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-10-28 19:24:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-10-28 19:24:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-10-28 19:24:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-10-28 19:24:53,159 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-10-28 19:24:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:24:53,160 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-10-28 19:24:53,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:24:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-10-28 19:24:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:24:53,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:24:53,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:24:53,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:24:53,182 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:24:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:24:53,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-10-28 19:24:53,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:24:53,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069058460] [2020-10-28 19:24:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:24:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:24:53,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:54,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:55,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:24:58,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:24:58,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:24:58,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:24:58,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:24:58,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:24:58,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:24:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:24:58,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:24:58,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-28 19:24:58,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:25:00,019 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:25:00,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:00,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:00,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:00,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:00,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:00,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 19:25:00,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:00,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:00,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:25:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:00,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069058460] [2020-10-28 19:25:00,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:00,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:00,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47583542] [2020-10-28 19:25:00,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:00,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:00,311 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-10-28 19:25:10,563 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:25:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:13,388 INFO L93 Difference]: Finished difference Result 23205 states and 36018 transitions. [2020-10-28 19:25:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:13,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-28 19:25:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:13,456 INFO L225 Difference]: With dead ends: 23205 [2020-10-28 19:25:13,456 INFO L226 Difference]: Without dead ends: 15387 [2020-10-28 19:25:13,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15387 states. [2020-10-28 19:25:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15387 to 15384. [2020-10-28 19:25:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15384 states. [2020-10-28 19:25:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15384 states to 15384 states and 23767 transitions. [2020-10-28 19:25:14,305 INFO L78 Accepts]: Start accepts. Automaton has 15384 states and 23767 transitions. Word has length 325 [2020-10-28 19:25:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:14,306 INFO L481 AbstractCegarLoop]: Abstraction has 15384 states and 23767 transitions. [2020-10-28 19:25:14,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:14,306 INFO L276 IsEmpty]: Start isEmpty. Operand 15384 states and 23767 transitions. [2020-10-28 19:25:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:25:14,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:14,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:14,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:25:14,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1038869709, now seen corresponding path program 1 times [2020-10-28 19:25:14,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:14,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019322132] [2020-10-28 19:25:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:14,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:14,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:14,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:16,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:19,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:19,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:25:19,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:25:19,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:25:19,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:19,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:19,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 19:25:19,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:21,006 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:25:21,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:21,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:21,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:21,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:25:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:21,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:21,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019322132] [2020-10-28 19:25:21,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:21,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:21,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510726692] [2020-10-28 19:25:21,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:21,202 INFO L87 Difference]: Start difference. First operand 15384 states and 23767 transitions. Second operand 5 states. [2020-10-28 19:25:31,338 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:25:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:34,637 INFO L93 Difference]: Finished difference Result 45442 states and 70105 transitions. [2020-10-28 19:25:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:34,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-28 19:25:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:34,714 INFO L225 Difference]: With dead ends: 45442 [2020-10-28 19:25:34,714 INFO L226 Difference]: Without dead ends: 30150 [2020-10-28 19:25:34,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30150 states. [2020-10-28 19:25:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30150 to 30147. [2020-10-28 19:25:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30147 states. [2020-10-28 19:25:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30147 states to 30147 states and 46293 transitions. [2020-10-28 19:25:36,563 INFO L78 Accepts]: Start accepts. Automaton has 30147 states and 46293 transitions. Word has length 327 [2020-10-28 19:25:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:25:36,563 INFO L481 AbstractCegarLoop]: Abstraction has 30147 states and 46293 transitions. [2020-10-28 19:25:36,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:25:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 30147 states and 46293 transitions. [2020-10-28 19:25:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-28 19:25:36,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:25:36,626 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:25:36,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:25:36,626 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:25:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:25:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash -952214032, now seen corresponding path program 1 times [2020-10-28 19:25:36,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:25:36,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842517178] [2020-10-28 19:25:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:25:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:36,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:37,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:38,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:38,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:40,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:40,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:40,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:41,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:41,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:41,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 19:25:41,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:25:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 19:25:41,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:41,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:41,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:25:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:25:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 19:25:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:43,170 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:25:43,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:25:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:25:43,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:25:43,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:25:43,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:25:43,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:25:43,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:25:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:25:43,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842517178] [2020-10-28 19:25:43,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:25:43,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:25:43,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940332538] [2020-10-28 19:25:43,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:25:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:25:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:25:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:25:43,352 INFO L87 Difference]: Start difference. First operand 30147 states and 46293 transitions. Second operand 5 states. [2020-10-28 19:25:53,850 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:25:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:25:57,156 INFO L93 Difference]: Finished difference Result 89031 states and 136486 transitions. [2020-10-28 19:25:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:25:57,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-28 19:25:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:25:57,284 INFO L225 Difference]: With dead ends: 89031 [2020-10-28 19:25:57,284 INFO L226 Difference]: Without dead ends: 58972 [2020-10-28 19:25:57,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:25:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58972 states. [2020-10-28 19:26:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58972 to 58969. [2020-10-28 19:26:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58969 states. [2020-10-28 19:26:00,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58969 states to 58969 states and 89873 transitions. [2020-10-28 19:26:00,698 INFO L78 Accepts]: Start accepts. Automaton has 58969 states and 89873 transitions. Word has length 329 [2020-10-28 19:26:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:00,699 INFO L481 AbstractCegarLoop]: Abstraction has 58969 states and 89873 transitions. [2020-10-28 19:26:00,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 58969 states and 89873 transitions. [2020-10-28 19:26:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:26:00,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:00,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:00,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:26:00,783 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:00,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1774946548, now seen corresponding path program 1 times [2020-10-28 19:26:00,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:00,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934908442] [2020-10-28 19:26:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:00,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:01,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:02,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:03,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:03,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:03,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:05,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:05,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:05,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 19:26:05,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:07,354 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:26:07,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:07,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:07,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:07,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:07,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:07,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:26:07,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:07,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:07,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:07,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:07,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934908442] [2020-10-28 19:26:07,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:07,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:07,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595863307] [2020-10-28 19:26:07,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:07,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:07,621 INFO L87 Difference]: Start difference. First operand 58969 states and 89873 transitions. Second operand 5 states. [2020-10-28 19:26:21,022 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:26:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:26:25,879 INFO L93 Difference]: Finished difference Result 174101 states and 264893 transitions. [2020-10-28 19:26:25,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:26:25,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 19:26:25,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:26:26,092 INFO L225 Difference]: With dead ends: 174101 [2020-10-28 19:26:26,092 INFO L226 Difference]: Without dead ends: 115350 [2020-10-28 19:26:26,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:26:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115350 states. [2020-10-28 19:26:33,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115350 to 115347. [2020-10-28 19:26:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115347 states. [2020-10-28 19:26:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115347 states to 115347 states and 174523 transitions. [2020-10-28 19:26:33,969 INFO L78 Accepts]: Start accepts. Automaton has 115347 states and 174523 transitions. Word has length 331 [2020-10-28 19:26:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:26:33,969 INFO L481 AbstractCegarLoop]: Abstraction has 115347 states and 174523 transitions. [2020-10-28 19:26:33,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:26:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 115347 states and 174523 transitions. [2020-10-28 19:26:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 19:26:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:26:34,092 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:26:34,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:26:34,093 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:26:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:26:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 3842101, now seen corresponding path program 1 times [2020-10-28 19:26:34,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:26:34,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492779979] [2020-10-28 19:26:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:26:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:34,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:34,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:35,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:35,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:35,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:35,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:39,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:39,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 19:26:39,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:26:39,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:26:39,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:39,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:26:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:26:39,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-28 19:26:39,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:40,638 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:26:40,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:26:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:26:40,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:26:40,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:26:40,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:26:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:26:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:26:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:26:40,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492779979] [2020-10-28 19:26:40,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:26:40,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:26:40,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540113206] [2020-10-28 19:26:40,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:26:40,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:26:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:26:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:26:40,824 INFO L87 Difference]: Start difference. First operand 115347 states and 174523 transitions. Second operand 5 states. [2020-10-28 19:27:00,185 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:27:08,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:27:08,168 INFO L93 Difference]: Finished difference Result 340269 states and 513864 transitions. [2020-10-28 19:27:08,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:27:08,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-28 19:27:08,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:27:08,783 INFO L225 Difference]: With dead ends: 340269 [2020-10-28 19:27:08,783 INFO L226 Difference]: Without dead ends: 225706 [2020-10-28 19:27:08,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:27:09,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225706 states.