/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:06:52,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:06:52,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:06:52,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:06:52,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:06:52,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:06:52,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:06:52,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:06:52,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:06:52,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:06:52,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:06:52,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:06:52,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:06:52,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:06:52,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:06:52,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:06:52,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:06:52,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:06:52,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:06:52,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:06:52,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:06:52,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:06:52,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:06:52,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:06:52,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:06:52,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:06:52,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:06:52,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:06:52,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:06:52,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:06:52,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:06:52,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:06:52,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:06:52,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:06:52,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:06:52,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:06:52,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:06:52,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:06:52,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:06:52,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:06:52,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:06:52,749 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 00:06:52,798 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:06:52,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:06:52,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:06:52,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:06:52,803 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:06:52,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:06:52,804 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:06:52,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:06:52,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:06:52,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:06:52,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:06:52,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:06:52,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:06:52,806 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:06:52,806 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:06:52,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:06:52,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:06:52,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:06:52,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:06:52,807 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:06:52,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:06:52,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:06:52,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:06:52,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:06:52,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:06:52,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:06:52,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:06:52,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:06:52,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:06:52,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:06:53,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:06:53,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:06:53,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:06:53,242 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:06:53,243 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:06:53,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:06:53,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50738512d/2fe3dd5803ac4159bfccd4d7b7209247/FLAGd4abd95ae [2020-10-28 00:06:54,230 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:06:54,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:06:54,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50738512d/2fe3dd5803ac4159bfccd4d7b7209247/FLAGd4abd95ae [2020-10-28 00:06:54,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50738512d/2fe3dd5803ac4159bfccd4d7b7209247 [2020-10-28 00:06:54,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:06:54,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:06:54,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:06:54,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:06:54,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:06:54,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:06:54" (1/1) ... [2020-10-28 00:06:54,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386c1247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:54, skipping insertion in model container [2020-10-28 00:06:54,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:06:54" (1/1) ... [2020-10-28 00:06:54,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:06:54,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:06:55,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:06:55,032 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:06:55,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:06:55,255 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:06:55,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55 WrapperNode [2020-10-28 00:06:55,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:06:55,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:06:55,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:06:55,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:06:55,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (1/1) ... [2020-10-28 00:06:55,405 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:06:55,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:06:55,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:06:55,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:06:55,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (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 00:06:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:06:55,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:06:55,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:06:55,494 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:06:55,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:06:55,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:06:55,496 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:06:55,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:06:55,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:06:55,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:06:55,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:06:57,580 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:06:57,580 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:06:57,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:06:57 BoogieIcfgContainer [2020-10-28 00:06:57,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:06:57,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:06:57,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:06:57,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:06:57,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:06:54" (1/3) ... [2020-10-28 00:06:57,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38077000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:06:57, skipping insertion in model container [2020-10-28 00:06:57,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:06:55" (2/3) ... [2020-10-28 00:06:57,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38077000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:06:57, skipping insertion in model container [2020-10-28 00:06:57,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:06:57" (3/3) ... [2020-10-28 00:06:57,592 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-28 00:06:57,604 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:06:57,609 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:06:57,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:06:57,660 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:06:57,661 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:06:57,661 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:06:57,661 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:06:57,661 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:06:57,661 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:06:57,661 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:06:57,661 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:06:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states. [2020-10-28 00:06:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:06:57,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:06:57,708 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] [2020-10-28 00:06:57,708 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:06:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:06:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1123619796, now seen corresponding path program 1 times [2020-10-28 00:06:57,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:06:57,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580290919] [2020-10-28 00:06:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:06:58,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:06:58,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:58,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:06:59,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:00,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:00,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:02,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:03,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:03,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:07:03,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:07:03,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 00:07:03,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:03,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 00:07:03,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 00:07:03,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:07:03,903 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:03,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:03,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:03,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:03,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:03,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 00:07:03,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:03,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:03,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:03,993 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 00:07:03,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580290919] [2020-10-28 00:07:03,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:03,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:03,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527942668] [2020-10-28 00:07:04,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:04,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:04,029 INFO L87 Difference]: Start difference. First operand 450 states. Second operand 4 states. [2020-10-28 00:07:04,878 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:07:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:08,687 INFO L93 Difference]: Finished difference Result 698 states and 1231 transitions. [2020-10-28 00:07:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:08,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:07:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:08,715 INFO L225 Difference]: With dead ends: 698 [2020-10-28 00:07:08,715 INFO L226 Difference]: Without dead ends: 547 [2020-10-28 00:07:08,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2020-10-28 00:07:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 541. [2020-10-28 00:07:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2020-10-28 00:07:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 723 transitions. [2020-10-28 00:07:08,815 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 723 transitions. Word has length 54 [2020-10-28 00:07:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:08,815 INFO L481 AbstractCegarLoop]: Abstraction has 541 states and 723 transitions. [2020-10-28 00:07:08,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 723 transitions. [2020-10-28 00:07:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:07:08,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:08,821 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] [2020-10-28 00:07:08,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:07:08,822 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1782826764, now seen corresponding path program 1 times [2020-10-28 00:07:08,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:08,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965412697] [2020-10-28 00:07:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:08,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:09,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:09,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:09,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:09,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:10,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:12,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:13,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:13,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:07:13,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:07:13,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 00:07:13,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:07:13,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 00:07:13,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:14,607 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:14,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:14,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:14,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:14,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:14,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:14,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:07:14,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:14,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:14,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:14,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:14,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:14,661 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 00:07:14,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965412697] [2020-10-28 00:07:14,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:14,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:14,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055713149] [2020-10-28 00:07:14,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:14,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:14,665 INFO L87 Difference]: Start difference. First operand 541 states and 723 transitions. Second operand 4 states. [2020-10-28 00:07:15,443 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:07:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:18,019 INFO L93 Difference]: Finished difference Result 954 states and 1335 transitions. [2020-10-28 00:07:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:18,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:07:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:18,025 INFO L225 Difference]: With dead ends: 954 [2020-10-28 00:07:18,026 INFO L226 Difference]: Without dead ends: 715 [2020-10-28 00:07:18,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-28 00:07:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 709. [2020-10-28 00:07:18,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-10-28 00:07:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 965 transitions. [2020-10-28 00:07:18,091 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 965 transitions. Word has length 54 [2020-10-28 00:07:18,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:18,092 INFO L481 AbstractCegarLoop]: Abstraction has 709 states and 965 transitions. [2020-10-28 00:07:18,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:18,092 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 965 transitions. [2020-10-28 00:07:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:07:18,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:18,098 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] [2020-10-28 00:07:18,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:07:18,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1617453592, now seen corresponding path program 1 times [2020-10-28 00:07:18,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:18,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881729720] [2020-10-28 00:07:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:18,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:18,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:19,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:20,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:21,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:23,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:23,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:07:23,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:07:23,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:07:23,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:23,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:07:23,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:07:23,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:07:23,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:23,821 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:23,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:23,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:23,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:23,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:23,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:23,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:07:23,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:23,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:23,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:23,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:23,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:23,877 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 00:07:23,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881729720] [2020-10-28 00:07:23,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:23,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:07:23,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398105207] [2020-10-28 00:07:23,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:07:23,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:07:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:07:23,880 INFO L87 Difference]: Start difference. First operand 709 states and 965 transitions. Second operand 4 states. [2020-10-28 00:07:24,557 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:07:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:27,389 INFO L93 Difference]: Finished difference Result 1363 states and 1918 transitions. [2020-10-28 00:07:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:07:27,390 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:07:27,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:27,396 INFO L225 Difference]: With dead ends: 1363 [2020-10-28 00:07:27,397 INFO L226 Difference]: Without dead ends: 1036 [2020-10-28 00:07:27,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:07:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-10-28 00:07:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1029. [2020-10-28 00:07:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2020-10-28 00:07:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1417 transitions. [2020-10-28 00:07:27,466 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1417 transitions. Word has length 54 [2020-10-28 00:07:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:27,469 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1417 transitions. [2020-10-28 00:07:27,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:07:27,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1417 transitions. [2020-10-28 00:07:27,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:07:27,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:27,471 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] [2020-10-28 00:07:27,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:07:27,473 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:27,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:27,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1669815269, now seen corresponding path program 1 times [2020-10-28 00:07:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:27,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133299110] [2020-10-28 00:07:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:27,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:28,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:28,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:28,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:29,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:30,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:32,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:32,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:07:32,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:07:32,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 00:07:32,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:32,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:07:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:07:33,260 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:33,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:33,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:33,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:33,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:33,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:07:33,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:33,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:33,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:33,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:33,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:33,310 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 00:07:33,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133299110] [2020-10-28 00:07:33,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:33,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:33,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89394249] [2020-10-28 00:07:33,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:33,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:33,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:33,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:33,313 INFO L87 Difference]: Start difference. First operand 1029 states and 1417 transitions. Second operand 6 states. [2020-10-28 00:07:36,320 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:07:37,680 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:07:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:37,866 INFO L93 Difference]: Finished difference Result 2955 states and 4274 transitions. [2020-10-28 00:07:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:07:37,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-28 00:07:37,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:37,883 INFO L225 Difference]: With dead ends: 2955 [2020-10-28 00:07:37,883 INFO L226 Difference]: Without dead ends: 2486 [2020-10-28 00:07:37,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2020-10-28 00:07:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1041. [2020-10-28 00:07:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2020-10-28 00:07:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1421 transitions. [2020-10-28 00:07:37,978 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1421 transitions. Word has length 54 [2020-10-28 00:07:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:37,979 INFO L481 AbstractCegarLoop]: Abstraction has 1041 states and 1421 transitions. [2020-10-28 00:07:37,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1421 transitions. [2020-10-28 00:07:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:07:37,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:37,984 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] [2020-10-28 00:07:37,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:07:37,985 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:37,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:37,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1309221832, now seen corresponding path program 1 times [2020-10-28 00:07:37,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:37,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366543188] [2020-10-28 00:07:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:38,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:39,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:39,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:40,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:41,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:43,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:43,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:07:43,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:07:43,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:07:43,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:43,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:07:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:43,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:07:43,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:43,834 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:43,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:43,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:43,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:43,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:43,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:43,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:07:43,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:43,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:43,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:43,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:43,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:07:43,889 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 00:07:43,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366543188] [2020-10-28 00:07:43,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:43,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:07:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837559957] [2020-10-28 00:07:43,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:07:43,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:07:43,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:07:43,893 INFO L87 Difference]: Start difference. First operand 1041 states and 1421 transitions. Second operand 6 states. [2020-10-28 00:07:46,833 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:07:48,380 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:07:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:07:48,631 INFO L93 Difference]: Finished difference Result 2947 states and 4242 transitions. [2020-10-28 00:07:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:07:48,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 00:07:48,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:07:48,647 INFO L225 Difference]: With dead ends: 2947 [2020-10-28 00:07:48,647 INFO L226 Difference]: Without dead ends: 2550 [2020-10-28 00:07:48,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:07:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2020-10-28 00:07:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1067. [2020-10-28 00:07:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1067 states. [2020-10-28 00:07:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1449 transitions. [2020-10-28 00:07:48,738 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1449 transitions. Word has length 55 [2020-10-28 00:07:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:07:48,739 INFO L481 AbstractCegarLoop]: Abstraction has 1067 states and 1449 transitions. [2020-10-28 00:07:48,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:07:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1449 transitions. [2020-10-28 00:07:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:07:48,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:07:48,741 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] [2020-10-28 00:07:48,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:07:48,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:07:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:07:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2143420201, now seen corresponding path program 1 times [2020-10-28 00:07:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:07:48,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311974802] [2020-10-28 00:07:48,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:07:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:48,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:48,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:50,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:53,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:53,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:07:53,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:07:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:07:53,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:07:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:07:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:07:53,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:54,580 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:07:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:07:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:07:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:07:54,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:07:54,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:07:54,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:07:54,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 00:07:54,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:07:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:07:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:07:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:07:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:07:54,653 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 00:07:54,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311974802] [2020-10-28 00:07:54,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:07:54,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:07:54,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264786005] [2020-10-28 00:07:54,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:07:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:07:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:07:54,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:07:54,658 INFO L87 Difference]: Start difference. First operand 1067 states and 1449 transitions. Second operand 9 states. [2020-10-28 00:07:55,386 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:07:58,432 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:07:59,867 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:08:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:00,091 INFO L93 Difference]: Finished difference Result 3045 states and 4316 transitions. [2020-10-28 00:08:00,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 00:08:00,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 00:08:00,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:00,109 INFO L225 Difference]: With dead ends: 3045 [2020-10-28 00:08:00,109 INFO L226 Difference]: Without dead ends: 2556 [2020-10-28 00:08:00,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-28 00:08:00,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2020-10-28 00:08:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1103. [2020-10-28 00:08:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-10-28 00:08:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1491 transitions. [2020-10-28 00:08:00,208 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1491 transitions. Word has length 55 [2020-10-28 00:08:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:00,208 INFO L481 AbstractCegarLoop]: Abstraction has 1103 states and 1491 transitions. [2020-10-28 00:08:00,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:08:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1491 transitions. [2020-10-28 00:08:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:08:00,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:00,210 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] [2020-10-28 00:08:00,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:08:00,211 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:00,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1484213233, now seen corresponding path program 1 times [2020-10-28 00:08:00,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:00,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520724620] [2020-10-28 00:08:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:00,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:00,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:01,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:02,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:05,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:05,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:08:05,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:06,042 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:08:06,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:06,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:06,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:06,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:06,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:06,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:08:06,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:06,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:06,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:06,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:06,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:06,091 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 00:08:06,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520724620] [2020-10-28 00:08:06,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:06,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:08:06,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326176623] [2020-10-28 00:08:06,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:08:06,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:08:06,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:08:06,093 INFO L87 Difference]: Start difference. First operand 1103 states and 1491 transitions. Second operand 9 states. [2020-10-28 00:08:06,876 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-28 00:08:10,201 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:08:13,111 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:08:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:13,389 INFO L93 Difference]: Finished difference Result 3061 states and 4322 transitions. [2020-10-28 00:08:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:08:13,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 00:08:13,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:13,403 INFO L225 Difference]: With dead ends: 3061 [2020-10-28 00:08:13,403 INFO L226 Difference]: Without dead ends: 2599 [2020-10-28 00:08:13,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-28 00:08:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2020-10-28 00:08:13,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 1241. [2020-10-28 00:08:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2020-10-28 00:08:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1686 transitions. [2020-10-28 00:08:13,510 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1686 transitions. Word has length 55 [2020-10-28 00:08:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:13,510 INFO L481 AbstractCegarLoop]: Abstraction has 1241 states and 1686 transitions. [2020-10-28 00:08:13,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:08:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1686 transitions. [2020-10-28 00:08:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:08:13,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:13,513 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] [2020-10-28 00:08:13,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:08:13,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 199645946, now seen corresponding path program 1 times [2020-10-28 00:08:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:13,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541782168] [2020-10-28 00:08:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:13,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:13,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:14,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:15,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:16,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:18,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:18,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:08:18,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:08:18,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 00:08:18,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:08:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:08:18,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:08:18,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:19,278 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:08:19,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:19,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:19,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:19,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:08:19,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:19,318 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 00:08:19,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541782168] [2020-10-28 00:08:19,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:19,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:08:19,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083332259] [2020-10-28 00:08:19,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:08:19,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:08:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:08:19,320 INFO L87 Difference]: Start difference. First operand 1241 states and 1686 transitions. Second operand 7 states. [2020-10-28 00:08:20,086 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:08:22,787 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-28 00:08:23,542 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:08:24,317 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:08:25,030 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:08:26,776 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:08:27,474 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:08:28,155 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:08:29,099 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:08:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:29,151 INFO L93 Difference]: Finished difference Result 6208 states and 8893 transitions. [2020-10-28 00:08:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:08:29,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-28 00:08:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:29,176 INFO L225 Difference]: With dead ends: 6208 [2020-10-28 00:08:29,176 INFO L226 Difference]: Without dead ends: 5254 [2020-10-28 00:08:29,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:08:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2020-10-28 00:08:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 4084. [2020-10-28 00:08:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4084 states. [2020-10-28 00:08:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4084 states to 4084 states and 5830 transitions. [2020-10-28 00:08:29,527 INFO L78 Accepts]: Start accepts. Automaton has 4084 states and 5830 transitions. Word has length 55 [2020-10-28 00:08:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:29,527 INFO L481 AbstractCegarLoop]: Abstraction has 4084 states and 5830 transitions. [2020-10-28 00:08:29,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:08:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4084 states and 5830 transitions. [2020-10-28 00:08:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:08:29,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:29,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:29,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:08:29,532 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:29,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:29,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1691032622, now seen corresponding path program 1 times [2020-10-28 00:08:29,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:29,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937844561] [2020-10-28 00:08:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:29,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:29,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:30,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:32,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:33,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:34,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:34,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:08:34,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:35,261 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:08:35,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:35,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:35,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:35,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:35,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:35,294 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 00:08:35,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937844561] [2020-10-28 00:08:35,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:35,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:08:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892406084] [2020-10-28 00:08:35,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:08:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:35,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:08:35,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:08:35,296 INFO L87 Difference]: Start difference. First operand 4084 states and 5830 transitions. Second operand 6 states. [2020-10-28 00:08:37,646 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:08:39,197 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:08:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:39,784 INFO L93 Difference]: Finished difference Result 13906 states and 20149 transitions. [2020-10-28 00:08:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:08:39,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 00:08:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:39,836 INFO L225 Difference]: With dead ends: 13906 [2020-10-28 00:08:39,836 INFO L226 Difference]: Without dead ends: 10955 [2020-10-28 00:08:39,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:08:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10955 states. [2020-10-28 00:08:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10955 to 3665. [2020-10-28 00:08:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3665 states. [2020-10-28 00:08:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 5173 transitions. [2020-10-28 00:08:40,390 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 5173 transitions. Word has length 56 [2020-10-28 00:08:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:40,390 INFO L481 AbstractCegarLoop]: Abstraction has 3665 states and 5173 transitions. [2020-10-28 00:08:40,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:08:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 5173 transitions. [2020-10-28 00:08:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:08:40,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:40,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:08:40,396 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -683334187, now seen corresponding path program 1 times [2020-10-28 00:08:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:40,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873802450] [2020-10-28 00:08:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:40,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:40,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:40,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:40,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:41,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:42,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:43,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:45,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:08:45,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-28 00:08:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:08:45,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:08:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:08:45,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:46,294 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:08:46,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:46,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:46,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:46,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:46,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:46,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 00:08:46,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:46,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:46,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:46,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:46,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:46,335 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 00:08:46,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873802450] [2020-10-28 00:08:46,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:46,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:08:46,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86874727] [2020-10-28 00:08:46,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:08:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:08:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:08:46,337 INFO L87 Difference]: Start difference. First operand 3665 states and 5173 transitions. Second operand 9 states. [2020-10-28 00:08:47,106 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:08:50,086 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:08:52,006 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:08:53,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:08:53,162 INFO L93 Difference]: Finished difference Result 11200 states and 15894 transitions. [2020-10-28 00:08:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:08:53,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 00:08:53,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:08:53,185 INFO L225 Difference]: With dead ends: 11200 [2020-10-28 00:08:53,185 INFO L226 Difference]: Without dead ends: 11194 [2020-10-28 00:08:53,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:08:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11194 states. [2020-10-28 00:08:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11194 to 3675. [2020-10-28 00:08:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3675 states. [2020-10-28 00:08:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5189 transitions. [2020-10-28 00:08:53,674 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5189 transitions. Word has length 56 [2020-10-28 00:08:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:08:53,674 INFO L481 AbstractCegarLoop]: Abstraction has 3675 states and 5189 transitions. [2020-10-28 00:08:53,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:08:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5189 transitions. [2020-10-28 00:08:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:08:53,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:08:53,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:08:53,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:08:53,680 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:08:53,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:08:53,680 INFO L82 PathProgramCache]: Analyzing trace with hash -499415415, now seen corresponding path program 1 times [2020-10-28 00:08:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:08:53,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87689292] [2020-10-28 00:08:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:08:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:53,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:53,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:53,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:54,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:55,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:56,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:56,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:57,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:57,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:57,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:58,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:58,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:08:58,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:08:58,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:08:58,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:58,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:08:58,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:08:58,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:08:58,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:59,631 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:08:59,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:08:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:08:59,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:08:59,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:08:59,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:08:59,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:08:59,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:08:59,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:08:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:08:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:08:59,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:08:59,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:08:59,670 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 00:08:59,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87689292] [2020-10-28 00:08:59,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:08:59,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:08:59,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084821152] [2020-10-28 00:08:59,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:08:59,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:08:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:08:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:08:59,673 INFO L87 Difference]: Start difference. First operand 3675 states and 5189 transitions. Second operand 9 states. [2020-10-28 00:09:00,407 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:09:03,124 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:09:04,918 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:09:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:05,898 INFO L93 Difference]: Finished difference Result 13206 states and 18973 transitions. [2020-10-28 00:09:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 00:09:05,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 00:09:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:05,924 INFO L225 Difference]: With dead ends: 13206 [2020-10-28 00:09:05,924 INFO L226 Difference]: Without dead ends: 11110 [2020-10-28 00:09:05,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-28 00:09:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11110 states. [2020-10-28 00:09:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11110 to 3691. [2020-10-28 00:09:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3691 states. [2020-10-28 00:09:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 5213 transitions. [2020-10-28 00:09:06,426 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 5213 transitions. Word has length 56 [2020-10-28 00:09:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:06,426 INFO L481 AbstractCegarLoop]: Abstraction has 3691 states and 5213 transitions. [2020-10-28 00:09:06,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:09:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 5213 transitions. [2020-10-28 00:09:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:09:06,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:06,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:06,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:09:06,432 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:06,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:06,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1852427651, now seen corresponding path program 1 times [2020-10-28 00:09:06,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:06,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380667095] [2020-10-28 00:09:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:06,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:06,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:07,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:08,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:10,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:11,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:09:11,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:12,305 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:09:12,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:12,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:12,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:12,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:12,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:12,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:09:12,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:12,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:12,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:12,353 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 00:09:12,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380667095] [2020-10-28 00:09:12,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:12,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:09:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271240620] [2020-10-28 00:09:12,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:09:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:12,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:09:12,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:09:12,356 INFO L87 Difference]: Start difference. First operand 3691 states and 5213 transitions. Second operand 10 states. [2020-10-28 00:09:13,130 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:09:15,802 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 295 [2020-10-28 00:09:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:18,442 INFO L93 Difference]: Finished difference Result 14638 states and 21197 transitions. [2020-10-28 00:09:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 00:09:18,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-28 00:09:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:18,467 INFO L225 Difference]: With dead ends: 14638 [2020-10-28 00:09:18,468 INFO L226 Difference]: Without dead ends: 12964 [2020-10-28 00:09:18,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-28 00:09:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12964 states. [2020-10-28 00:09:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12964 to 5880. [2020-10-28 00:09:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5880 states. [2020-10-28 00:09:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5880 states to 5880 states and 8422 transitions. [2020-10-28 00:09:19,200 INFO L78 Accepts]: Start accepts. Automaton has 5880 states and 8422 transitions. Word has length 57 [2020-10-28 00:09:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:19,200 INFO L481 AbstractCegarLoop]: Abstraction has 5880 states and 8422 transitions. [2020-10-28 00:09:19,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:09:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5880 states and 8422 transitions. [2020-10-28 00:09:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:09:19,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:19,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:19,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:09:19,206 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash -758680466, now seen corresponding path program 1 times [2020-10-28 00:09:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:19,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488278743] [2020-10-28 00:09:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:20,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:22,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:24,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:24,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:24,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:09:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 00:09:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:09:24,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:09:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:09:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 00:09:24,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:25,165 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:09:25,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:25,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:25,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:25,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:25,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:25,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:09:25,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:25,197 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 00:09:25,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488278743] [2020-10-28 00:09:25,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:25,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 00:09:25,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362751890] [2020-10-28 00:09:25,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:09:25,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:09:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:09:25,199 INFO L87 Difference]: Start difference. First operand 5880 states and 8422 transitions. Second operand 11 states. [2020-10-28 00:09:26,990 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 319 DAG size of output: 317 [2020-10-28 00:09:30,246 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-28 00:09:31,018 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-28 00:09:34,191 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:09:35,251 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-28 00:09:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:38,160 INFO L93 Difference]: Finished difference Result 28064 states and 40336 transitions. [2020-10-28 00:09:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 00:09:38,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-28 00:09:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:38,209 INFO L225 Difference]: With dead ends: 28064 [2020-10-28 00:09:38,209 INFO L226 Difference]: Without dead ends: 27421 [2020-10-28 00:09:38,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=267, Invalid=1215, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 00:09:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27421 states. [2020-10-28 00:09:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27421 to 3878. [2020-10-28 00:09:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2020-10-28 00:09:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5516 transitions. [2020-10-28 00:09:39,011 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5516 transitions. Word has length 57 [2020-10-28 00:09:39,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:39,011 INFO L481 AbstractCegarLoop]: Abstraction has 3878 states and 5516 transitions. [2020-10-28 00:09:39,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:09:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5516 transitions. [2020-10-28 00:09:39,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:09:39,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:39,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:39,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:09:39,015 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:39,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:39,015 INFO L82 PathProgramCache]: Analyzing trace with hash -86348968, now seen corresponding path program 1 times [2020-10-28 00:09:39,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:39,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060457927] [2020-10-28 00:09:39,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:39,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:40,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:41,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:42,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 00:09:44,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:44,771 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:09:44,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:44,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:44,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:44,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:44,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:44,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:09:44,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:44,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:44,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:44,806 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 00:09:44,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060457927] [2020-10-28 00:09:44,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:44,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:44,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728395947] [2020-10-28 00:09:44,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:44,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:44,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:44,808 INFO L87 Difference]: Start difference. First operand 3878 states and 5516 transitions. Second operand 4 states. [2020-10-28 00:09:47,213 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:09:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:48,160 INFO L93 Difference]: Finished difference Result 4960 states and 7066 transitions. [2020-10-28 00:09:48,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:48,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:09:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:48,165 INFO L225 Difference]: With dead ends: 4960 [2020-10-28 00:09:48,165 INFO L226 Difference]: Without dead ends: 3859 [2020-10-28 00:09:48,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2020-10-28 00:09:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3073. [2020-10-28 00:09:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3073 states. [2020-10-28 00:09:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3073 states to 3073 states and 4275 transitions. [2020-10-28 00:09:48,610 INFO L78 Accepts]: Start accepts. Automaton has 3073 states and 4275 transitions. Word has length 57 [2020-10-28 00:09:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:48,610 INFO L481 AbstractCegarLoop]: Abstraction has 3073 states and 4275 transitions. [2020-10-28 00:09:48,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3073 states and 4275 transitions. [2020-10-28 00:09:48,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:09:48,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:48,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:48,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:09:48,614 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 806159667, now seen corresponding path program 1 times [2020-10-28 00:09:48,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:48,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903926523] [2020-10-28 00:09:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:48,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:48,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:49,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:49,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:49,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:50,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:50,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:50,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:51,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:09:53,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 00:09:53,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:09:53,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:54,292 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:09:54,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:09:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:54,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:54,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:09:54,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:09:54,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:09:54,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:09:54,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:09:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:09:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:09:54,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:09:54,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:09:54,333 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 00:09:54,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903926523] [2020-10-28 00:09:54,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:09:54,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:09:54,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106900618] [2020-10-28 00:09:54,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:09:54,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:09:54,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:09:54,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:09:54,336 INFO L87 Difference]: Start difference. First operand 3073 states and 4275 transitions. Second operand 4 states. [2020-10-28 00:09:56,261 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:09:57,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:09:57,122 INFO L93 Difference]: Finished difference Result 4067 states and 5678 transitions. [2020-10-28 00:09:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:09:57,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:09:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:09:57,126 INFO L225 Difference]: With dead ends: 4067 [2020-10-28 00:09:57,126 INFO L226 Difference]: Without dead ends: 3041 [2020-10-28 00:09:57,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:09:57,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2020-10-28 00:09:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2384. [2020-10-28 00:09:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2384 states. [2020-10-28 00:09:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 3262 transitions. [2020-10-28 00:09:57,611 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 3262 transitions. Word has length 57 [2020-10-28 00:09:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:09:57,611 INFO L481 AbstractCegarLoop]: Abstraction has 2384 states and 3262 transitions. [2020-10-28 00:09:57,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:09:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 3262 transitions. [2020-10-28 00:09:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:09:57,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:09:57,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:09:57,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:09:57,615 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:09:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:09:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash 146521642, now seen corresponding path program 1 times [2020-10-28 00:09:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:09:57,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114638867] [2020-10-28 00:09:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:09:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:09:57,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:58,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:09:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:00,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:02,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:02,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:10:02,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 00:10:02,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:10:02,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:02,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:10:02,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:10:02,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 00:10:02,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:03,296 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:10:03,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:03,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:03,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:03,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:03,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:10:03,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:03,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:03,327 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 00:10:03,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114638867] [2020-10-28 00:10:03,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:03,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:10:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304827985] [2020-10-28 00:10:03,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:10:03,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:10:03,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:10:03,329 INFO L87 Difference]: Start difference. First operand 2384 states and 3262 transitions. Second operand 4 states. [2020-10-28 00:10:05,275 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-28 00:10:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:06,141 INFO L93 Difference]: Finished difference Result 3015 states and 4123 transitions. [2020-10-28 00:10:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:10:06,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 00:10:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:06,144 INFO L225 Difference]: With dead ends: 3015 [2020-10-28 00:10:06,144 INFO L226 Difference]: Without dead ends: 2322 [2020-10-28 00:10:06,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:10:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2020-10-28 00:10:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2319. [2020-10-28 00:10:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2319 states. [2020-10-28 00:10:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3106 transitions. [2020-10-28 00:10:06,665 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3106 transitions. Word has length 57 [2020-10-28 00:10:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:06,665 INFO L481 AbstractCegarLoop]: Abstraction has 2319 states and 3106 transitions. [2020-10-28 00:10:06,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:10:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3106 transitions. [2020-10-28 00:10:06,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:10:06,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:06,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:06,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:10:06,668 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash -920509811, now seen corresponding path program 1 times [2020-10-28 00:10:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:06,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769543643] [2020-10-28 00:10:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:06,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:06,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:08,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:09,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:10,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:10,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:10:11,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 00:10:11,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:12,428 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:10:12,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:12,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:12,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:12,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:12,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:12,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:10:12,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:12,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:12,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:12,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:12,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:12,461 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 00:10:12,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769543643] [2020-10-28 00:10:12,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:12,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:10:12,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008086149] [2020-10-28 00:10:12,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:12,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:12,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:12,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:12,463 INFO L87 Difference]: Start difference. First operand 2319 states and 3106 transitions. Second operand 6 states. [2020-10-28 00:10:13,210 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:10:15,914 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-28 00:10:16,661 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:10:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:10:18,643 INFO L93 Difference]: Finished difference Result 5591 states and 7616 transitions. [2020-10-28 00:10:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:10:18,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 00:10:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:10:18,648 INFO L225 Difference]: With dead ends: 5591 [2020-10-28 00:10:18,649 INFO L226 Difference]: Without dead ends: 5126 [2020-10-28 00:10:18,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:10:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2020-10-28 00:10:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4348. [2020-10-28 00:10:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4348 states. [2020-10-28 00:10:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 5864 transitions. [2020-10-28 00:10:19,479 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 5864 transitions. Word has length 57 [2020-10-28 00:10:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:10:19,479 INFO L481 AbstractCegarLoop]: Abstraction has 4348 states and 5864 transitions. [2020-10-28 00:10:19,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:10:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 5864 transitions. [2020-10-28 00:10:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:10:19,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:10:19,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:10:19,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:10:19,483 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:10:19,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:10:19,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1224893297, now seen corresponding path program 1 times [2020-10-28 00:10:19,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:10:19,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815994395] [2020-10-28 00:10:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:10:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:20,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:21,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:22,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:22,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:22,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:23,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:23,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:24,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:24,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:10:24,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 00:10:24,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:10:24,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:10:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:10:24,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:10:24,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:25,190 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-28 00:10:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:10:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:10:25,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:10:25,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:10:25,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:10:25,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:10:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:10:25,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:10:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:10:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:10:25,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:10:25,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:10:25,229 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 00:10:25,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815994395] [2020-10-28 00:10:25,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:10:25,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:10:25,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937314267] [2020-10-28 00:10:25,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:10:25,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:10:25,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:10:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:10:25,231 INFO L87 Difference]: Start difference. First operand 4348 states and 5864 transitions. Second operand 6 states. [2020-10-28 00:10:25,904 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification that was a NOOP. DAG size: 293 [2020-10-28 00:10:28,813 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification that was a NOOP. DAG size: 293