/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:59:36,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:59:36,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:59:36,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:59:36,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:59:36,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:59:36,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:59:36,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:59:36,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:59:36,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:59:36,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:59:36,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:59:36,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:59:36,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:59:36,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:59:36,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:59:36,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:59:36,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:59:36,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:59:36,716 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:59:36,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:59:36,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:59:36,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:59:36,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:59:36,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:59:36,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:59:36,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:59:36,736 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:59:36,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:59:36,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:59:36,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:59:36,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:59:36,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:59:36,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:59:36,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:59:36,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:59:36,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:59:36,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:59:36,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:59:36,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:59:36,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:59:36,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:59:36,812 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:59:36,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:59:36,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:59:36,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:59:36,817 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:59:36,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:59:36,818 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:59:36,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:59:36,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:59:36,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:59:36,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:59:36,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:59:36,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:59:36,820 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:59:36,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:59:36,821 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:59:36,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:59:36,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:59:36,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:59:36,822 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:59:36,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:59:36,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:59:36,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:59:36,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:59:36,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:59:36,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:59:36,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:59:36,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:59:36,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:59:36,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:59:37,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:59:37,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:59:37,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:59:37,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:59:37,267 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:59:37,268 INFO L432 ainManager$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.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:59:37,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74e051647/38083616f9174264ba28df85a1a530e7/FLAGdecdb8a72 [2020-10-28 18:59:38,203 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:59:38,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:59:38,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74e051647/38083616f9174264ba28df85a1a530e7/FLAGdecdb8a72 [2020-10-28 18:59:38,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74e051647/38083616f9174264ba28df85a1a530e7 [2020-10-28 18:59:38,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:59:38,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:59:38,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:59:38,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:59:38,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:59:38,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:59:38" (1/1) ... [2020-10-28 18:59:38,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467a846a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:38, skipping insertion in model container [2020-10-28 18:59:38,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:59:38" (1/1) ... [2020-10-28 18:59:38,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:59:38,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:59:38,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:59:38,982 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:59:39,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:59:39,110 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:59:39,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39 WrapperNode [2020-10-28 18:59:39,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:59:39,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:59:39,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:59:39,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:59:39,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... [2020-10-28 18:59:39,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:59:39,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:59:39,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:59:39,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:59:39,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:59:39,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:59:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:59:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:59:39,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:59:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:59:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:59:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:59:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:59:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:59:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:59:39,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:59:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:59:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:59:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:59:39,301 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:59:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:59:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:59:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:59:39,302 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:59:39,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:59:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:59:39,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:59:40,544 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:59:40,545 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:59:40,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:59:40 BoogieIcfgContainer [2020-10-28 18:59:40,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:59:40,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:59:40,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:59:40,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:59:40,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:59:38" (1/3) ... [2020-10-28 18:59:40,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0b9594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:59:40, skipping insertion in model container [2020-10-28 18:59:40,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:59:39" (2/3) ... [2020-10-28 18:59:40,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0b9594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:59:40, skipping insertion in model container [2020-10-28 18:59:40,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:59:40" (3/3) ... [2020-10-28 18:59:40,557 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:59:40,567 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:59:40,572 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:59:40,588 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:59:40,621 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:59:40,622 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:59:40,622 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:59:40,622 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:59:40,622 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:59:40,622 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:59:40,622 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:59:40,623 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:59:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states. [2020-10-28 18:59:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 18:59:40,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:40,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:40,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash -572174847, now seen corresponding path program 1 times [2020-10-28 18:59:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:40,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221299444] [2020-10-28 18:59:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:41,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:44,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:44,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 18:59:44,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:59:44,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3730 [2020-10-28 18:59:44,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:44,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:59:44,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:59:44,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:59:45,163 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:45,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:45,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:45,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:45,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:45,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:45,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:59:45,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:45,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:45,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:45,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:45,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:45,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221299444] [2020-10-28 18:59:45,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:45,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725755000] [2020-10-28 18:59:45,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:45,247 INFO L87 Difference]: Start difference. First operand 179 states. Second operand 4 states. [2020-10-28 18:59:45,598 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 18:59:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:46,584 INFO L93 Difference]: Finished difference Result 358 states and 582 transitions. [2020-10-28 18:59:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:46,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 18:59:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:46,611 INFO L225 Difference]: With dead ends: 358 [2020-10-28 18:59:46,611 INFO L226 Difference]: Without dead ends: 266 [2020-10-28 18:59:46,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:46,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-28 18:59:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 263. [2020-10-28 18:59:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-28 18:59:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 393 transitions. [2020-10-28 18:59:46,725 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 393 transitions. Word has length 68 [2020-10-28 18:59:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:46,726 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 393 transitions. [2020-10-28 18:59:46,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 393 transitions. [2020-10-28 18:59:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:59:46,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:46,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:46,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:59:46,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash -71991462, now seen corresponding path program 1 times [2020-10-28 18:59:46,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:46,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738135334] [2020-10-28 18:59:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:47,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:47,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:47,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:59:47,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:59:47,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-28 18:59:47,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:47,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:59:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 18:59:47,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:59:47,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:59:48,119 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:48,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:48,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:48,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:48,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:48,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:59:48,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:48,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:48,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:48,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:48,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738135334] [2020-10-28 18:59:48,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:48,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:59:48,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465940378] [2020-10-28 18:59:48,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:59:48,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:48,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:59:48,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:48,168 INFO L87 Difference]: Start difference. First operand 263 states and 393 transitions. Second operand 5 states. [2020-10-28 18:59:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:49,022 INFO L93 Difference]: Finished difference Result 400 states and 608 transitions. [2020-10-28 18:59:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:59:49,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 18:59:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:49,028 INFO L225 Difference]: With dead ends: 400 [2020-10-28 18:59:49,029 INFO L226 Difference]: Without dead ends: 397 [2020-10-28 18:59:49,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:59:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-28 18:59:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 265. [2020-10-28 18:59:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-28 18:59:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 395 transitions. [2020-10-28 18:59:49,061 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 395 transitions. Word has length 69 [2020-10-28 18:59:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:49,061 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 395 transitions. [2020-10-28 18:59:49,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:59:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 395 transitions. [2020-10-28 18:59:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:59:49,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:49,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:49,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:59:49,065 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:49,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:49,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1543469195, now seen corresponding path program 1 times [2020-10-28 18:59:49,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:49,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160235715] [2020-10-28 18:59:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:49,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:50,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:59:50,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:59:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-28 18:59:50,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:50,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:59:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:59:50,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 18:59:50,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:50,714 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:50,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:50,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:50,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:50,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:50,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:59:50,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:50,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:50,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:50,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:59:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:50,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160235715] [2020-10-28 18:59:50,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:50,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:59:50,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690731266] [2020-10-28 18:59:50,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:59:50,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:50,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:59:50,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:50,764 INFO L87 Difference]: Start difference. First operand 265 states and 395 transitions. Second operand 5 states. [2020-10-28 18:59:51,053 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:51,813 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:59:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:52,260 INFO L93 Difference]: Finished difference Result 554 states and 850 transitions. [2020-10-28 18:59:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:59:52,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 18:59:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:52,267 INFO L225 Difference]: With dead ends: 554 [2020-10-28 18:59:52,267 INFO L226 Difference]: Without dead ends: 403 [2020-10-28 18:59:52,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-28 18:59:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 398. [2020-10-28 18:59:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-28 18:59:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 604 transitions. [2020-10-28 18:59:52,339 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 604 transitions. Word has length 70 [2020-10-28 18:59:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:52,342 INFO L481 AbstractCegarLoop]: Abstraction has 398 states and 604 transitions. [2020-10-28 18:59:52,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:59:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 604 transitions. [2020-10-28 18:59:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:59:52,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:52,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:52,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:59:52,355 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1249900192, now seen corresponding path program 1 times [2020-10-28 18:59:52,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:52,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936061557] [2020-10-28 18:59:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:52,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:52,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:54,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:57,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:59:57,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:57,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:59:57,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:57,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:57,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:59:57,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:59:57,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-28 18:59:57,745 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:57,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:57,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:57,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:57,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:57,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:57,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:59:57,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:57,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:57,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:57,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:57,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:59:57,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936061557] [2020-10-28 18:59:57,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:57,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:59:57,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798594147] [2020-10-28 18:59:57,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:59:57,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:57,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:59:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:59:57,804 INFO L87 Difference]: Start difference. First operand 398 states and 604 transitions. Second operand 4 states. [2020-10-28 18:59:58,044 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:59:58,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:58,799 INFO L93 Difference]: Finished difference Result 1056 states and 1638 transitions. [2020-10-28 18:59:58,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:59:58,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 18:59:58,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:58,806 INFO L225 Difference]: With dead ends: 1056 [2020-10-28 18:59:58,806 INFO L226 Difference]: Without dead ends: 732 [2020-10-28 18:59:58,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:59:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-10-28 18:59:58,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 729. [2020-10-28 18:59:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 729 states. [2020-10-28 18:59:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 1115 transitions. [2020-10-28 18:59:58,870 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 1115 transitions. Word has length 71 [2020-10-28 18:59:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:58,870 INFO L481 AbstractCegarLoop]: Abstraction has 729 states and 1115 transitions. [2020-10-28 18:59:58,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:59:58,870 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 1115 transitions. [2020-10-28 18:59:58,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:59:58,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:58,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:58,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:59:58,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:58,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1803796190, now seen corresponding path program 1 times [2020-10-28 18:59:58,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:58,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747657308] [2020-10-28 18:59:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:58,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:59,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:59,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:00,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:03,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:03,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:03,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:03,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:03,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 19:00:03,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 19:00:03,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:04,189 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:04,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:04,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:04,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:04,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:04,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:04,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:00:04,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:04,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:04,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:04,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:04,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747657308] [2020-10-28 19:00:04,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:04,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:00:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299383385] [2020-10-28 19:00:04,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:00:04,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:00:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:00:04,242 INFO L87 Difference]: Start difference. First operand 729 states and 1115 transitions. Second operand 4 states. [2020-10-28 19:00:04,482 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:00:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:05,239 INFO L93 Difference]: Finished difference Result 1823 states and 2824 transitions. [2020-10-28 19:00:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:00:05,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:00:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:05,249 INFO L225 Difference]: With dead ends: 1823 [2020-10-28 19:00:05,249 INFO L226 Difference]: Without dead ends: 1266 [2020-10-28 19:00:05,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:00:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2020-10-28 19:00:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1263. [2020-10-28 19:00:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1263 states. [2020-10-28 19:00:05,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1926 transitions. [2020-10-28 19:00:05,333 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1926 transitions. Word has length 71 [2020-10-28 19:00:05,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:05,335 INFO L481 AbstractCegarLoop]: Abstraction has 1263 states and 1926 transitions. [2020-10-28 19:00:05,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:00:05,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1926 transitions. [2020-10-28 19:00:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:00:05,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:05,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:05,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:00:05,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash 377170656, now seen corresponding path program 1 times [2020-10-28 19:00:05,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:05,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993853737] [2020-10-28 19:00:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:05,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:05,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:06,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:10,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:10,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:00:10,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:10,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:00:10,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:10,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 19:00:10,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 19:00:10,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:10,654 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:10,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:10,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:10,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:10,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:10,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:10,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:00:10,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:10,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:10,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:10,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993853737] [2020-10-28 19:00:10,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:10,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:00:10,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632875270] [2020-10-28 19:00:10,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:00:10,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:00:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:00:10,695 INFO L87 Difference]: Start difference. First operand 1263 states and 1926 transitions. Second operand 4 states. [2020-10-28 19:00:10,936 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:00:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:11,730 INFO L93 Difference]: Finished difference Result 3321 states and 5088 transitions. [2020-10-28 19:00:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:00:11,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:00:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:11,743 INFO L225 Difference]: With dead ends: 3321 [2020-10-28 19:00:11,744 INFO L226 Difference]: Without dead ends: 2258 [2020-10-28 19:00:11,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:00:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2020-10-28 19:00:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 2255. [2020-10-28 19:00:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2255 states. [2020-10-28 19:00:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 3396 transitions. [2020-10-28 19:00:11,883 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 3396 transitions. Word has length 71 [2020-10-28 19:00:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:11,884 INFO L481 AbstractCegarLoop]: Abstraction has 2255 states and 3396 transitions. [2020-10-28 19:00:11,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:00:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 3396 transitions. [2020-10-28 19:00:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 19:00:11,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:11,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:11,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:00:11,886 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:11,887 INFO L82 PathProgramCache]: Analyzing trace with hash -310252190, now seen corresponding path program 1 times [2020-10-28 19:00:11,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:11,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822004182] [2020-10-28 19:00:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:13,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:16,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:16,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 19:00:16,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:16,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4860 [2020-10-28 19:00:16,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:16,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 19:00:16,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 19:00:16,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:17,014 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:17,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:17,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:17,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:17,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:17,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:00:17,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:17,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:17,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:17,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:17,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:17,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822004182] [2020-10-28 19:00:17,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:17,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:00:17,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493395882] [2020-10-28 19:00:17,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:00:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:00:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:00:17,055 INFO L87 Difference]: Start difference. First operand 2255 states and 3396 transitions. Second operand 4 states. [2020-10-28 19:00:17,413 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:00:18,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:18,409 INFO L93 Difference]: Finished difference Result 6066 states and 9138 transitions. [2020-10-28 19:00:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:00:18,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-28 19:00:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:18,436 INFO L225 Difference]: With dead ends: 6066 [2020-10-28 19:00:18,437 INFO L226 Difference]: Without dead ends: 4047 [2020-10-28 19:00:18,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:00:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2020-10-28 19:00:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4044. [2020-10-28 19:00:18,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4044 states. [2020-10-28 19:00:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 5978 transitions. [2020-10-28 19:00:18,768 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 5978 transitions. Word has length 71 [2020-10-28 19:00:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:18,768 INFO L481 AbstractCegarLoop]: Abstraction has 4044 states and 5978 transitions. [2020-10-28 19:00:18,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:00:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 5978 transitions. [2020-10-28 19:00:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:00:18,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:18,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:18,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:00:18,772 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash 139604947, now seen corresponding path program 1 times [2020-10-28 19:00:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:18,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368118808] [2020-10-28 19:00:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:18,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:18,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:19,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:19,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:22,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:22,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:00:22,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:22,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3442 [2020-10-28 19:00:22,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:22,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:22,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 19:00:22,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:22,534 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:22,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:22,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:22,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:22,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:00:22,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:22,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368118808] [2020-10-28 19:00:22,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:22,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:22,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147853957] [2020-10-28 19:00:22,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:22,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:22,591 INFO L87 Difference]: Start difference. First operand 4044 states and 5978 transitions. Second operand 8 states. [2020-10-28 19:00:22,868 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:00:23,795 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:24,935 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:25,408 INFO L93 Difference]: Finished difference Result 18412 states and 27147 transitions. [2020-10-28 19:00:25,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:00:25,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-28 19:00:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:25,497 INFO L225 Difference]: With dead ends: 18412 [2020-10-28 19:00:25,497 INFO L226 Difference]: Without dead ends: 16777 [2020-10-28 19:00:25,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:00:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16777 states. [2020-10-28 19:00:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16777 to 4204. [2020-10-28 19:00:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4204 states. [2020-10-28 19:00:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6192 transitions. [2020-10-28 19:00:26,010 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6192 transitions. Word has length 72 [2020-10-28 19:00:26,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:26,011 INFO L481 AbstractCegarLoop]: Abstraction has 4204 states and 6192 transitions. [2020-10-28 19:00:26,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6192 transitions. [2020-10-28 19:00:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:00:26,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:26,014 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:26,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:00:26,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash 303589698, now seen corresponding path program 1 times [2020-10-28 19:00:26,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:26,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174030503] [2020-10-28 19:00:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:26,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:26,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:29,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:00:29,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:29,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3040 [2020-10-28 19:00:29,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:29,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:29,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 19:00:29,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:29,398 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:29,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:29,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:29,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:29,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:00:29,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:29,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:29,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:29,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:29,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:29,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:29,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174030503] [2020-10-28 19:00:29,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:29,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054832145] [2020-10-28 19:00:29,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:29,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:29,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:29,466 INFO L87 Difference]: Start difference. First operand 4204 states and 6192 transitions. Second operand 8 states. [2020-10-28 19:00:29,719 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:00:30,640 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:32,071 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:32,780 INFO L93 Difference]: Finished difference Result 23701 states and 35129 transitions. [2020-10-28 19:00:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:00:32,780 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-28 19:00:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:32,828 INFO L225 Difference]: With dead ends: 23701 [2020-10-28 19:00:32,829 INFO L226 Difference]: Without dead ends: 20288 [2020-10-28 19:00:32,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:32,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20288 states. [2020-10-28 19:00:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20288 to 4471. [2020-10-28 19:00:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4471 states. [2020-10-28 19:00:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 6463 transitions. [2020-10-28 19:00:33,412 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 6463 transitions. Word has length 72 [2020-10-28 19:00:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:33,413 INFO L481 AbstractCegarLoop]: Abstraction has 4471 states and 6463 transitions. [2020-10-28 19:00:33,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 6463 transitions. [2020-10-28 19:00:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 19:00:33,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:33,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:33,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:00:33,417 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:33,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1884583051, now seen corresponding path program 1 times [2020-10-28 19:00:33,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:33,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576720892] [2020-10-28 19:00:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:33,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:33,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:33,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:33,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:36,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3242 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:00:36,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:37,098 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:37,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:37,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:37,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:37,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:37,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 19:00:37,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:37,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:37,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:37,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:37,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576720892] [2020-10-28 19:00:37,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:37,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109786489] [2020-10-28 19:00:37,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:00:37,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:00:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:00:37,162 INFO L87 Difference]: Start difference. First operand 4471 states and 6463 transitions. Second operand 8 states. [2020-10-28 19:00:37,448 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:38,524 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 19:00:39,824 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:40,591 INFO L93 Difference]: Finished difference Result 19550 states and 28608 transitions. [2020-10-28 19:00:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:00:40,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-28 19:00:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:40,632 INFO L225 Difference]: With dead ends: 19550 [2020-10-28 19:00:40,632 INFO L226 Difference]: Without dead ends: 16052 [2020-10-28 19:00:40,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:40,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16052 states. [2020-10-28 19:00:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16052 to 4516. [2020-10-28 19:00:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4516 states. [2020-10-28 19:00:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 6476 transitions. [2020-10-28 19:00:41,291 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 6476 transitions. Word has length 72 [2020-10-28 19:00:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:41,292 INFO L481 AbstractCegarLoop]: Abstraction has 4516 states and 6476 transitions. [2020-10-28 19:00:41,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:00:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 6476 transitions. [2020-10-28 19:00:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:00:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:41,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:41,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:00:41,297 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2141404751, now seen corresponding path program 1 times [2020-10-28 19:00:41,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:41,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296169434] [2020-10-28 19:00:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:42,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:46,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:00:46,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:00:46,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 19:00:46,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:46,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:00:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:00:46,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:00:46,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:00:46,641 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:46,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:46,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:46,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:46,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:46,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:46,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:00:46,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:46,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:46,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:46,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:46,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296169434] [2020-10-28 19:00:46,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:46,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:46,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435257227] [2020-10-28 19:00:46,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:00:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:00:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:00:46,681 INFO L87 Difference]: Start difference. First operand 4516 states and 6476 transitions. Second operand 7 states. [2020-10-28 19:00:46,996 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:47,803 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:00:48,086 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:00:49,481 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:49,713 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:00:49,959 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 19:00:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:50,098 INFO L93 Difference]: Finished difference Result 16202 states and 23577 transitions. [2020-10-28 19:00:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:00:50,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-28 19:00:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:50,129 INFO L225 Difference]: With dead ends: 16202 [2020-10-28 19:00:50,129 INFO L226 Difference]: Without dead ends: 12919 [2020-10-28 19:00:50,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12919 states. [2020-10-28 19:00:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 5363. [2020-10-28 19:00:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5363 states. [2020-10-28 19:00:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 7727 transitions. [2020-10-28 19:00:50,721 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 7727 transitions. Word has length 73 [2020-10-28 19:00:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:50,721 INFO L481 AbstractCegarLoop]: Abstraction has 5363 states and 7727 transitions. [2020-10-28 19:00:50,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:00:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 7727 transitions. [2020-10-28 19:00:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:00:50,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:50,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:00:50,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:00:50,725 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1256026737, now seen corresponding path program 1 times [2020-10-28 19:00:50,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:50,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788771917] [2020-10-28 19:00:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:50,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:51,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:53,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:55,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:55,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:00:55,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:00:55,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:00:55,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:55,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:00:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:00:55,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 19:00:55,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:56,042 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:56,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:56,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:56,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:56,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:56,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:00:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788771917] [2020-10-28 19:00:56,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:56,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:56,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864442859] [2020-10-28 19:00:56,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:00:56,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:56,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:00:56,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:00:56,076 INFO L87 Difference]: Start difference. First operand 5363 states and 7727 transitions. Second operand 7 states. [2020-10-28 19:00:56,383 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:57,254 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:00:57,610 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:00:59,078 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:59,334 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:00:59,594 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 19:00:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:59,873 INFO L93 Difference]: Finished difference Result 18150 states and 26437 transitions. [2020-10-28 19:00:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:00:59,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-28 19:00:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:59,907 INFO L225 Difference]: With dead ends: 18150 [2020-10-28 19:00:59,908 INFO L226 Difference]: Without dead ends: 14867 [2020-10-28 19:00:59,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:59,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14867 states. [2020-10-28 19:01:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14867 to 6660. [2020-10-28 19:01:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6660 states. [2020-10-28 19:01:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6660 states to 6660 states and 9653 transitions. [2020-10-28 19:01:00,936 INFO L78 Accepts]: Start accepts. Automaton has 6660 states and 9653 transitions. Word has length 73 [2020-10-28 19:01:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:00,936 INFO L481 AbstractCegarLoop]: Abstraction has 6660 states and 9653 transitions. [2020-10-28 19:01:00,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:01:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6660 states and 9653 transitions. [2020-10-28 19:01:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 19:01:00,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:00,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:00,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:01:00,941 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1708691976, now seen corresponding path program 1 times [2020-10-28 19:01:00,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:00,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429147935] [2020-10-28 19:01:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:00,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:01,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:03,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:03,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 19:01:03,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:01:03,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2781 [2020-10-28 19:01:03,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:03,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:01:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:03,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:01:03,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:04,124 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:01:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:04,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:04,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:04,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:04,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:04,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 19:01:04,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:04,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:04,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429147935] [2020-10-28 19:01:04,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:04,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:01:04,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440893111] [2020-10-28 19:01:04,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:01:04,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:04,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:01:04,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:01:04,224 INFO L87 Difference]: Start difference. First operand 6660 states and 9653 transitions. Second operand 8 states. [2020-10-28 19:01:04,503 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:01:05,548 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 19:01:07,363 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:01:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:08,786 INFO L93 Difference]: Finished difference Result 29262 states and 42501 transitions. [2020-10-28 19:01:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:01:08,786 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 19:01:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:08,820 INFO L225 Difference]: With dead ends: 29262 [2020-10-28 19:01:08,821 INFO L226 Difference]: Without dead ends: 23571 [2020-10-28 19:01:08,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:01:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23571 states. [2020-10-28 19:01:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23571 to 6744. [2020-10-28 19:01:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6744 states. [2020-10-28 19:01:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6744 states to 6744 states and 9633 transitions. [2020-10-28 19:01:09,864 INFO L78 Accepts]: Start accepts. Automaton has 6744 states and 9633 transitions. Word has length 73 [2020-10-28 19:01:09,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:09,864 INFO L481 AbstractCegarLoop]: Abstraction has 6744 states and 9633 transitions. [2020-10-28 19:01:09,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:01:09,864 INFO L276 IsEmpty]: Start isEmpty. Operand 6744 states and 9633 transitions. [2020-10-28 19:01:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:01:09,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:09,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:09,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:01:09,869 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1671257337, now seen corresponding path program 1 times [2020-10-28 19:01:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:09,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131457242] [2020-10-28 19:01:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:09,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:09,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:09,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:10,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:10,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:11,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:11,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:12,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:14,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:14,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 19:01:14,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 19:01:14,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:15,171 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:01:15,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:15,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:15,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:15,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:15,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:01:15,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:15,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:15,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:15,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:15,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131457242] [2020-10-28 19:01:15,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:15,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:01:15,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920766953] [2020-10-28 19:01:15,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:01:15,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:15,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:01:15,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:01:15,216 INFO L87 Difference]: Start difference. First operand 6744 states and 9633 transitions. Second operand 7 states. [2020-10-28 19:01:15,498 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:01:16,505 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:01:16,815 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:01:18,551 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:01:18,797 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:01:19,044 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 19:01:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:19,556 INFO L93 Difference]: Finished difference Result 19868 states and 28539 transitions. [2020-10-28 19:01:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:01:19,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-28 19:01:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:19,578 INFO L225 Difference]: With dead ends: 19868 [2020-10-28 19:01:19,578 INFO L226 Difference]: Without dead ends: 16585 [2020-10-28 19:01:19,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:01:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16585 states. [2020-10-28 19:01:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16585 to 8108. [2020-10-28 19:01:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8108 states. [2020-10-28 19:01:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8108 states to 8108 states and 11605 transitions. [2020-10-28 19:01:20,946 INFO L78 Accepts]: Start accepts. Automaton has 8108 states and 11605 transitions. Word has length 74 [2020-10-28 19:01:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:20,947 INFO L481 AbstractCegarLoop]: Abstraction has 8108 states and 11605 transitions. [2020-10-28 19:01:20,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:01:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8108 states and 11605 transitions. [2020-10-28 19:01:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 19:01:20,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:20,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:20,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:01:20,951 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:20,951 INFO L82 PathProgramCache]: Analyzing trace with hash 888340253, now seen corresponding path program 1 times [2020-10-28 19:01:20,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:20,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241045222] [2020-10-28 19:01:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:20,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:21,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:22,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:25,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:25,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 19:01:25,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:01:25,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:01:25,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:25,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:01:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:01:25,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 19:01:25,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:26,265 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:01:26,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:26,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:26,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:26,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:26,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:26,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:26,294 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 19:01:26,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241045222] [2020-10-28 19:01:26,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:26,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:01:26,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870647635] [2020-10-28 19:01:26,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:01:26,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:01:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:01:26,296 INFO L87 Difference]: Start difference. First operand 8108 states and 11605 transitions. Second operand 7 states. [2020-10-28 19:01:26,598 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:01:27,641 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:01:28,025 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:01:29,963 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:01:30,216 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:01:30,555 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 19:01:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:31,076 INFO L93 Difference]: Finished difference Result 21479 states and 30848 transitions. [2020-10-28 19:01:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:01:31,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-28 19:01:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:31,094 INFO L225 Difference]: With dead ends: 21479 [2020-10-28 19:01:31,094 INFO L226 Difference]: Without dead ends: 18196 [2020-10-28 19:01:31,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:01:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18196 states. [2020-10-28 19:01:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18196 to 9346. [2020-10-28 19:01:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9346 states. [2020-10-28 19:01:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9346 states to 9346 states and 13400 transitions. [2020-10-28 19:01:32,373 INFO L78 Accepts]: Start accepts. Automaton has 9346 states and 13400 transitions. Word has length 74 [2020-10-28 19:01:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:32,374 INFO L481 AbstractCegarLoop]: Abstraction has 9346 states and 13400 transitions. [2020-10-28 19:01:32,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:01:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9346 states and 13400 transitions. [2020-10-28 19:01:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 19:01:32,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:32,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:32,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:01:32,380 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash -866911551, now seen corresponding path program 1 times [2020-10-28 19:01:32,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:32,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899019431] [2020-10-28 19:01:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:32,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:33,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:33,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:33,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:36,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:36,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:36,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:37,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:37,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:37,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 19:01:37,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 19:01:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:01:37,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:37,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:37,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:01:37,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:01:37,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 19:01:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:37,686 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:01:37,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:37,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:01:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:01:37,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:37,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899019431] [2020-10-28 19:01:37,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:37,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:01:37,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837239993] [2020-10-28 19:01:37,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:01:37,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:37,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:01:37,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:01:37,731 INFO L87 Difference]: Start difference. First operand 9346 states and 13400 transitions. Second operand 6 states. [2020-10-28 19:01:38,019 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 19:01:39,264 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:01:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:41,536 INFO L93 Difference]: Finished difference Result 25997 states and 37576 transitions. [2020-10-28 19:01:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:01:41,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-28 19:01:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:41,558 INFO L225 Difference]: With dead ends: 25997 [2020-10-28 19:01:41,558 INFO L226 Difference]: Without dead ends: 16977 [2020-10-28 19:01:41,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:01:41,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2020-10-28 19:01:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 16910. [2020-10-28 19:01:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16910 states. [2020-10-28 19:01:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 24350 transitions. [2020-10-28 19:01:43,975 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 24350 transitions. Word has length 77 [2020-10-28 19:01:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:43,975 INFO L481 AbstractCegarLoop]: Abstraction has 16910 states and 24350 transitions. [2020-10-28 19:01:43,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 24350 transitions. [2020-10-28 19:01:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 19:01:43,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:43,982 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:01:43,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:01:43,983 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:43,983 INFO L82 PathProgramCache]: Analyzing trace with hash 379219935, now seen corresponding path program 1 times [2020-10-28 19:01:43,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:43,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696756517] [2020-10-28 19:01:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:44,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:44,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:45,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:45,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:45,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:49,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:49,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-28 19:01:49,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:01:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:01:49,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:49,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:49,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:01:49,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 19:01:49,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 19:01:49,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:49,277 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:01:49,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:49,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:49,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:49,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:49,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 19:01:49,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:49,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:49,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:49,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:49,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696756517] [2020-10-28 19:01:49,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:49,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:01:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967665490] [2020-10-28 19:01:49,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:01:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:01:49,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:01:49,305 INFO L87 Difference]: Start difference. First operand 16910 states and 24350 transitions. Second operand 6 states. [2020-10-28 19:01:49,547 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 19:01:51,822 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:01:52,691 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 19:02:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:10,909 INFO L93 Difference]: Finished difference Result 140005 states and 202494 transitions. [2020-10-28 19:02:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 19:02:10,910 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-28 19:02:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:11,131 INFO L225 Difference]: With dead ends: 140005 [2020-10-28 19:02:11,131 INFO L226 Difference]: Without dead ends: 123981 [2020-10-28 19:02:11,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 19:02:11,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123981 states. [2020-10-28 19:02:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123981 to 62780. [2020-10-28 19:02:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62780 states. [2020-10-28 19:02:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62780 states to 62780 states and 90329 transitions. [2020-10-28 19:02:21,970 INFO L78 Accepts]: Start accepts. Automaton has 62780 states and 90329 transitions. Word has length 78 [2020-10-28 19:02:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:21,971 INFO L481 AbstractCegarLoop]: Abstraction has 62780 states and 90329 transitions. [2020-10-28 19:02:21,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:02:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 62780 states and 90329 transitions. [2020-10-28 19:02:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:02:21,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:21,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:02:21,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:02:21,984 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:21,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:21,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1541695834, now seen corresponding path program 1 times [2020-10-28 19:02:21,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:21,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555091443] [2020-10-28 19:02:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:22,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:22,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:22,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:23,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:23,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:23,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:23,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:24,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:24,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:25,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:27,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 19:02:27,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:27,278 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:02:27,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:27,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:27,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:27,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:27,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:27,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:02:27,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:27,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:27,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:02:27,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:27,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:02:27,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:02:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:27,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555091443] [2020-10-28 19:02:27,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:27,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:02:27,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296600467] [2020-10-28 19:02:27,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:02:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:02:27,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:02:27,318 INFO L87 Difference]: Start difference. First operand 62780 states and 90329 transitions. Second operand 6 states. [2020-10-28 19:02:27,612 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:02:29,497 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:02:42,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:42,804 INFO L93 Difference]: Finished difference Result 149966 states and 215833 transitions. [2020-10-28 19:02:42,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:02:42,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-28 19:02:42,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:42,941 INFO L225 Difference]: With dead ends: 149966 [2020-10-28 19:02:42,942 INFO L226 Difference]: Without dead ends: 87601 [2020-10-28 19:02:42,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:02:43,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87601 states. [2020-10-28 19:02:57,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87601 to 87086. [2020-10-28 19:02:57,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87086 states. [2020-10-28 19:02:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87086 states to 87086 states and 124274 transitions. [2020-10-28 19:02:57,237 INFO L78 Accepts]: Start accepts. Automaton has 87086 states and 124274 transitions. Word has length 79 [2020-10-28 19:02:57,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:57,238 INFO L481 AbstractCegarLoop]: Abstraction has 87086 states and 124274 transitions. [2020-10-28 19:02:57,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:02:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 87086 states and 124274 transitions. [2020-10-28 19:02:57,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 19:02:57,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:57,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:02:57,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 19:02:57,248 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash -692445788, now seen corresponding path program 1 times [2020-10-28 19:02:57,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:57,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825426125] [2020-10-28 19:02:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:57,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:57,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:59,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:59,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:59,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:59,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:00,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:02,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:02,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 19:03:02,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 19:03:02,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 19:03:02,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:02,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:02,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:03:02,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 19:03:02,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 19:03:02,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:02,547 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:03:02,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:02,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:02,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:02,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:02,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:02,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:03:02,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:02,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:02,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:02,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:02,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825426125] [2020-10-28 19:03:02,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:02,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 19:03:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592086256] [2020-10-28 19:03:02,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:03:02,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:03:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:03:02,583 INFO L87 Difference]: Start difference. First operand 87086 states and 124274 transitions. Second operand 6 states. [2020-10-28 19:03:02,859 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 19:03:07,497 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:03:09,099 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 152