/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.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:28:46,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:28:46,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:28:46,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:28:46,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:28:46,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:28:46,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:28:46,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:28:46,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:28:46,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:28:46,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:28:46,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:28:46,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:28:46,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:28:46,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:28:46,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:28:46,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:28:46,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:28:46,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:28:46,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:28:46,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:28:46,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:28:46,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:28:46,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:28:46,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:28:46,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:28:46,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:28:46,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:28:46,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:28:46,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:28:46,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:28:46,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:28:46,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:28:46,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:28:46,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:28:46,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:28:46,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:28:46,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:28:46,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:28:46,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:28:46,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:28:46,779 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 18:28:46,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:28:46,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:28:46,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:28:46,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:28:46,833 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:28:46,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:28:46,834 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:28:46,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:28:46,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:28:46,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:28:46,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:28:46,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:28:46,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:28:46,836 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:28:46,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:28:46,836 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:28:46,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:28:46,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:28:46,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:28:46,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:28:46,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:28:46,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:28:46,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:28:46,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:28:46,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:28:46,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:28:46,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:28:46,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:28:46,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:28:46,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:28:47,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:28:47,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:28:47,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:28:47,260 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:28:47,261 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:28:47,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:28:47,354 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaad2ebf4/df639758230647d189ae9b29e03fa899/FLAGf317639ed [2020-10-28 18:28:48,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:28:48,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:28:48,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaad2ebf4/df639758230647d189ae9b29e03fa899/FLAGf317639ed [2020-10-28 18:28:48,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aaad2ebf4/df639758230647d189ae9b29e03fa899 [2020-10-28 18:28:48,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:28:48,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:28:48,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:28:48,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:28:48,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:28:48,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:28:48" (1/1) ... [2020-10-28 18:28:48,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41dfa502 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:48, skipping insertion in model container [2020-10-28 18:28:48,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:28:48" (1/1) ... [2020-10-28 18:28:48,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:28:48,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:28:48,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:28:48,851 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:28:49,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:28:49,037 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:28:49,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49 WrapperNode [2020-10-28 18:28:49,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:28:49,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:28:49,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:28:49,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:28:49,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (1/1) ... [2020-10-28 18:28:49,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:28:49,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:28:49,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:28:49,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:28:49,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (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 18:28:49,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:28:49,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:28:49,209 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:28:49,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:28:49,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:28:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:28:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:28:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:28:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:28:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:28:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:28:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:28:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:28:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:28:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:28:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:28:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:28:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:28:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:28:49,211 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:28:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:28:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:28:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:28:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:28:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:28:49,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:28:49,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:28:50,196 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:28:50,196 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:28:50,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:28:50 BoogieIcfgContainer [2020-10-28 18:28:50,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:28:50,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:28:50,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:28:50,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:28:50,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:28:48" (1/3) ... [2020-10-28 18:28:50,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324875fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:28:50, skipping insertion in model container [2020-10-28 18:28:50,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:28:49" (2/3) ... [2020-10-28 18:28:50,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324875fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:28:50, skipping insertion in model container [2020-10-28 18:28:50,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:28:50" (3/3) ... [2020-10-28 18:28:50,208 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-28 18:28:50,221 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:28:50,227 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:28:50,242 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:28:50,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:28:50,272 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:28:50,273 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:28:50,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:28:50,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:28:50,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:28:50,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:28:50,273 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:28:50,295 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-28 18:28:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:28:50,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:50,304 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] [2020-10-28 18:28:50,305 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:50,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1094105252, now seen corresponding path program 1 times [2020-10-28 18:28:50,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:50,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39649501] [2020-10-28 18:28:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:50,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:50,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:50,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:51,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:52,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:55,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:55,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:28:55,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:28:55,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:28:55,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:55,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:28:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:28:55,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:28:55,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:28:56,183 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:28:56,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:28:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:56,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:56,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:28:56,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:28:56,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:28:56,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:28:56,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:28:56,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:28:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:28:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:28:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:28:56,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:28:56,238 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 18:28:56,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39649501] [2020-10-28 18:28:56,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:28:56,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:28:56,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469317599] [2020-10-28 18:28:56,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:28:56,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:28:56,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:28:56,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:28:56,266 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 6 states. [2020-10-28 18:28:56,745 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:28:57,732 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:28:57,996 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:28:58,740 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:28:58,942 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:28:58,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:28:58,954 INFO L93 Difference]: Finished difference Result 434 states and 691 transitions. [2020-10-28 18:28:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:28:58,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-28 18:28:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:28:58,971 INFO L225 Difference]: With dead ends: 434 [2020-10-28 18:28:58,971 INFO L226 Difference]: Without dead ends: 359 [2020-10-28 18:28:58,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-28 18:28:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-28 18:28:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 159. [2020-10-28 18:28:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-28 18:28:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 224 transitions. [2020-10-28 18:28:59,063 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 224 transitions. Word has length 53 [2020-10-28 18:28:59,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:28:59,063 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 224 transitions. [2020-10-28 18:28:59,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:28:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 224 transitions. [2020-10-28 18:28:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:28:59,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:28:59,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:28:59,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:28:59,067 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:28:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:28:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash -475741743, now seen corresponding path program 1 times [2020-10-28 18:28:59,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:28:59,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530963111] [2020-10-28 18:28:59,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:28:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:28:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:28:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:00,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:04,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:04,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:29:04,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:29:04,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:29:04,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:04,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 18:29:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:29:04,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:04,377 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:04,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:04,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:04,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:04,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:04,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:04,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:29:04,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:04,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:04,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:04,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:04,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:04,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:04,420 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 18:29:04,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530963111] [2020-10-28 18:29:04,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:04,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:29:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123943496] [2020-10-28 18:29:04,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:29:04,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:04,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:29:04,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:29:04,437 INFO L87 Difference]: Start difference. First operand 159 states and 224 transitions. Second operand 4 states. [2020-10-28 18:29:04,671 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:29:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:05,228 INFO L93 Difference]: Finished difference Result 249 states and 359 transitions. [2020-10-28 18:29:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:29:05,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 18:29:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:05,233 INFO L225 Difference]: With dead ends: 249 [2020-10-28 18:29:05,234 INFO L226 Difference]: Without dead ends: 164 [2020-10-28 18:29:05,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:29:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-28 18:29:05,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2020-10-28 18:29:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-28 18:29:05,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 225 transitions. [2020-10-28 18:29:05,274 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 225 transitions. Word has length 54 [2020-10-28 18:29:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:05,275 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 225 transitions. [2020-10-28 18:29:05,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:29:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 225 transitions. [2020-10-28 18:29:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:05,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:05,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:05,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:29:05,281 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:05,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:05,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1197254214, now seen corresponding path program 1 times [2020-10-28 18:29:05,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:05,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992036385] [2020-10-28 18:29:05,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:05,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:05,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:06,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:08,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:08,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:08,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:08,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:10,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:10,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:29:10,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:29:10,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:10,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:29:10,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:29:10,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:10,574 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:10,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:10,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:10,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:10,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:10,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:10,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:29:10,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:10,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:10,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:10,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:10,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:29:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:10,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992036385] [2020-10-28 18:29:10,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:10,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:29:10,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312569539] [2020-10-28 18:29:10,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:10,623 INFO L87 Difference]: Start difference. First operand 161 states and 225 transitions. Second operand 6 states. [2020-10-28 18:29:10,852 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:29:11,346 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:29:11,597 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:29:11,814 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:29:12,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:12,123 INFO L93 Difference]: Finished difference Result 509 states and 750 transitions. [2020-10-28 18:29:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:29:12,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 18:29:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:12,131 INFO L225 Difference]: With dead ends: 509 [2020-10-28 18:29:12,131 INFO L226 Difference]: Without dead ends: 426 [2020-10-28 18:29:12,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-28 18:29:12,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 283. [2020-10-28 18:29:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-28 18:29:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 411 transitions. [2020-10-28 18:29:12,196 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 411 transitions. Word has length 55 [2020-10-28 18:29:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:12,197 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 411 transitions. [2020-10-28 18:29:12,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 411 transitions. [2020-10-28 18:29:12,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:12,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:12,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:12,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:29:12,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:12,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1749490701, now seen corresponding path program 1 times [2020-10-28 18:29:12,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:12,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159150736] [2020-10-28 18:29:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:12,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:13,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:17,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:17,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:29:17,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:29:17,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:17,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:17,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:17,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:29:17,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:29:17,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:29:17,537 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:17,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:17,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:17,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:17,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:17,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:17,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:29:17,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:17,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:17,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:17,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:17,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:29:17,593 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 18:29:17,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159150736] [2020-10-28 18:29:17,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:17,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:29:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610709371] [2020-10-28 18:29:17,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:17,602 INFO L87 Difference]: Start difference. First operand 283 states and 411 transitions. Second operand 6 states. [2020-10-28 18:29:17,864 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:29:18,393 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:29:18,638 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:29:18,874 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:29:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:19,161 INFO L93 Difference]: Finished difference Result 689 states and 1019 transitions. [2020-10-28 18:29:19,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:29:19,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-28 18:29:19,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:19,167 INFO L225 Difference]: With dead ends: 689 [2020-10-28 18:29:19,167 INFO L226 Difference]: Without dead ends: 570 [2020-10-28 18:29:19,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-10-28 18:29:19,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 416. [2020-10-28 18:29:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-28 18:29:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 613 transitions. [2020-10-28 18:29:19,208 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 613 transitions. Word has length 55 [2020-10-28 18:29:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:19,208 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 613 transitions. [2020-10-28 18:29:19,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 613 transitions. [2020-10-28 18:29:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:29:19,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:19,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:19,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:29:19,211 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:19,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:19,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1517833072, now seen corresponding path program 1 times [2020-10-28 18:29:19,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:19,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790054864] [2020-10-28 18:29:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:19,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:21,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:22,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:23,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:23,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:23,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:24,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:29:24,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:29:24,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:29:24,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:24,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:29:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:24,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:29:24,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:24,654 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:24,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:24,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:24,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:24,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:24,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:29:24,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:24,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:24,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:24,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:24,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:24,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:24,720 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 18:29:24,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790054864] [2020-10-28 18:29:24,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:24,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:29:24,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141446951] [2020-10-28 18:29:24,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:29:24,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:29:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:29:24,723 INFO L87 Difference]: Start difference. First operand 416 states and 613 transitions. Second operand 8 states. [2020-10-28 18:29:24,940 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:29:25,631 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:29:26,411 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:29:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:26,629 INFO L93 Difference]: Finished difference Result 2418 states and 3627 transitions. [2020-10-28 18:29:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 18:29:26,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-28 18:29:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:26,643 INFO L225 Difference]: With dead ends: 2418 [2020-10-28 18:29:26,643 INFO L226 Difference]: Without dead ends: 2046 [2020-10-28 18:29:26,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-28 18:29:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2020-10-28 18:29:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 425. [2020-10-28 18:29:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-28 18:29:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 614 transitions. [2020-10-28 18:29:26,733 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 614 transitions. Word has length 55 [2020-10-28 18:29:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:26,733 INFO L481 AbstractCegarLoop]: Abstraction has 425 states and 614 transitions. [2020-10-28 18:29:26,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:29:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 614 transitions. [2020-10-28 18:29:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:29:26,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:26,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:26,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:29:26,740 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 33759509, now seen corresponding path program 1 times [2020-10-28 18:29:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:26,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467353315] [2020-10-28 18:29:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:26,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:26,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:29,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:31,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:31,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:29:31,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:32,026 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:32,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:32,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:32,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:32,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:32,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:32,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:29:32,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:32,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:32,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:32,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:32,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:32,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:29:32,062 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 18:29:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467353315] [2020-10-28 18:29:32,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:32,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:29:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337251314] [2020-10-28 18:29:32,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:32,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:32,065 INFO L87 Difference]: Start difference. First operand 425 states and 614 transitions. Second operand 6 states. [2020-10-28 18:29:32,304 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:29:32,748 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:29:32,968 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:29:33,185 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:29:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:33,480 INFO L93 Difference]: Finished difference Result 812 states and 1184 transitions. [2020-10-28 18:29:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:29:33,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:29:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:33,486 INFO L225 Difference]: With dead ends: 812 [2020-10-28 18:29:33,486 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 18:29:33,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:33,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 18:29:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 516. [2020-10-28 18:29:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-28 18:29:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 751 transitions. [2020-10-28 18:29:33,543 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 751 transitions. Word has length 56 [2020-10-28 18:29:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:33,545 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 751 transitions. [2020-10-28 18:29:33,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 751 transitions. [2020-10-28 18:29:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:29:33,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:33,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:33,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:29:33,550 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash 621607731, now seen corresponding path program 1 times [2020-10-28 18:29:33,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:33,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947924560] [2020-10-28 18:29:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:33,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:33,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:34,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:37,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:38,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:38,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:38,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:29:38,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:38,800 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:38,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:38,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:38,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:38,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:38,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:38,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:29:38,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:38,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:38,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:38,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:38,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:38,844 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 18:29:38,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947924560] [2020-10-28 18:29:38,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:38,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084668082] [2020-10-28 18:29:38,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:38,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:38,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:38,853 INFO L87 Difference]: Start difference. First operand 516 states and 751 transitions. Second operand 6 states. [2020-10-28 18:29:39,080 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:29:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:39,557 INFO L93 Difference]: Finished difference Result 946 states and 1400 transitions. [2020-10-28 18:29:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:29:39,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:29:39,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:39,563 INFO L225 Difference]: With dead ends: 946 [2020-10-28 18:29:39,563 INFO L226 Difference]: Without dead ends: 497 [2020-10-28 18:29:39,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:29:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-10-28 18:29:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2020-10-28 18:29:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-28 18:29:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 721 transitions. [2020-10-28 18:29:39,619 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 721 transitions. Word has length 56 [2020-10-28 18:29:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:39,619 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 721 transitions. [2020-10-28 18:29:39,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 721 transitions. [2020-10-28 18:29:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:29:39,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:39,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:39,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:29:39,621 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:39,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1476337486, now seen corresponding path program 1 times [2020-10-28 18:29:39,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:39,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814281689] [2020-10-28 18:29:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:39,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:41,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:42,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:44,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:44,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:29:44,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:29:44,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:29:44,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:44,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:44,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:29:44,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:29:44,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 18:29:44,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:44,883 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-28 18:29:45,089 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:45,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:45,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:45,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:45,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:45,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:29:45,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:45,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:45,140 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 18:29:45,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814281689] [2020-10-28 18:29:45,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:45,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:29:45,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772323745] [2020-10-28 18:29:45,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:29:45,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:29:45,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:29:45,146 INFO L87 Difference]: Start difference. First operand 497 states and 721 transitions. Second operand 8 states. [2020-10-28 18:29:45,397 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:29:46,050 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:29:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:46,458 INFO L93 Difference]: Finished difference Result 1342 states and 1975 transitions. [2020-10-28 18:29:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:29:46,458 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:29:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:46,463 INFO L225 Difference]: With dead ends: 1342 [2020-10-28 18:29:46,463 INFO L226 Difference]: Without dead ends: 912 [2020-10-28 18:29:46,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:29:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2020-10-28 18:29:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 497. [2020-10-28 18:29:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-10-28 18:29:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 720 transitions. [2020-10-28 18:29:46,562 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 720 transitions. Word has length 57 [2020-10-28 18:29:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:46,563 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 720 transitions. [2020-10-28 18:29:46,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:29:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 720 transitions. [2020-10-28 18:29:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:29:46,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:46,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:29:46,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:29:46,564 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 128327480, now seen corresponding path program 1 times [2020-10-28 18:29:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:46,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327558661] [2020-10-28 18:29:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:46,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:47,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:51,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:51,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:29:51,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:29:51,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:29:51,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:51,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:29:51,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 18:29:51,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:51,821 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:51,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:51,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:51,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:51,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:51,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:29:51,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:51,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:29:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:51,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:29:51,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:29:51,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327558661] [2020-10-28 18:29:51,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:51,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:29:51,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158683433] [2020-10-28 18:29:51,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:51,853 INFO L87 Difference]: Start difference. First operand 497 states and 720 transitions. Second operand 6 states. [2020-10-28 18:29:52,084 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:29:52,711 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:29:52,956 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:29:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:29:53,895 INFO L93 Difference]: Finished difference Result 2985 states and 4425 transitions. [2020-10-28 18:29:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:29:53,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-28 18:29:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:29:53,909 INFO L225 Difference]: With dead ends: 2985 [2020-10-28 18:29:53,909 INFO L226 Difference]: Without dead ends: 2567 [2020-10-28 18:29:53,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:29:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2020-10-28 18:29:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 1781. [2020-10-28 18:29:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1781 states. [2020-10-28 18:29:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2616 transitions. [2020-10-28 18:29:54,175 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2616 transitions. Word has length 57 [2020-10-28 18:29:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:29:54,175 INFO L481 AbstractCegarLoop]: Abstraction has 1781 states and 2616 transitions. [2020-10-28 18:29:54,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:29:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2616 transitions. [2020-10-28 18:29:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:29:54,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:29:54,177 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] [2020-10-28 18:29:54,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:29:54,177 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:29:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:29:54,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1495381923, now seen corresponding path program 1 times [2020-10-28 18:29:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:29:54,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455712465] [2020-10-28 18:29:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:29:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:54,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:54,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:55,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:56,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 18:29:59,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:59,452 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:29:59,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:29:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:29:59,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:29:59,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:29:59,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:29:59,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:29:59,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:29:59,496 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 18:29:59,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455712465] [2020-10-28 18:29:59,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:29:59,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:29:59,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445899870] [2020-10-28 18:29:59,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:29:59,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:29:59,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:29:59,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:29:59,498 INFO L87 Difference]: Start difference. First operand 1781 states and 2616 transitions. Second operand 6 states. [2020-10-28 18:29:59,758 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:30:00,250 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:00,859 INFO L93 Difference]: Finished difference Result 5111 states and 7527 transitions. [2020-10-28 18:30:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:30:00,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 18:30:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:00,877 INFO L225 Difference]: With dead ends: 5111 [2020-10-28 18:30:00,878 INFO L226 Difference]: Without dead ends: 3365 [2020-10-28 18:30:00,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2020-10-28 18:30:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3360. [2020-10-28 18:30:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2020-10-28 18:30:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4903 transitions. [2020-10-28 18:30:01,444 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4903 transitions. Word has length 58 [2020-10-28 18:30:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:01,444 INFO L481 AbstractCegarLoop]: Abstraction has 3360 states and 4903 transitions. [2020-10-28 18:30:01,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:30:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4903 transitions. [2020-10-28 18:30:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:30:01,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:01,446 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] [2020-10-28 18:30:01,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:30:01,446 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -272482679, now seen corresponding path program 1 times [2020-10-28 18:30:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:01,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827249308] [2020-10-28 18:30:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:01,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:02,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:06,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:06,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:30:06,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:30:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:30:06,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:06,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:30:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:30:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:06,834 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:06,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:06,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:06,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:06,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:06,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:06,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:30:06,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:06,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:06,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:06,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:06,874 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 18:30:06,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827249308] [2020-10-28 18:30:06,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:06,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:30:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555141407] [2020-10-28 18:30:06,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:30:06,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:06,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:30:06,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:30:06,876 INFO L87 Difference]: Start difference. First operand 3360 states and 4903 transitions. Second operand 11 states. [2020-10-28 18:30:07,174 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:30:08,021 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:08,261 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:30:09,357 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:30:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:09,987 INFO L93 Difference]: Finished difference Result 11093 states and 16281 transitions. [2020-10-28 18:30:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:30:09,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-28 18:30:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:10,026 INFO L225 Difference]: With dead ends: 11093 [2020-10-28 18:30:10,027 INFO L226 Difference]: Without dead ends: 7970 [2020-10-28 18:30:10,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:30:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7970 states. [2020-10-28 18:30:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7970 to 3360. [2020-10-28 18:30:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3360 states. [2020-10-28 18:30:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4888 transitions. [2020-10-28 18:30:10,562 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 4888 transitions. Word has length 59 [2020-10-28 18:30:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:10,562 INFO L481 AbstractCegarLoop]: Abstraction has 3360 states and 4888 transitions. [2020-10-28 18:30:10,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:30:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 4888 transitions. [2020-10-28 18:30:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:30:10,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:10,564 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] [2020-10-28 18:30:10,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:30:10,564 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash 573573813, now seen corresponding path program 1 times [2020-10-28 18:30:10,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:10,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356040380] [2020-10-28 18:30:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:10,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:10,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:11,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:11,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:30:11,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:30:11,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-28 18:30:11,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:11,279 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:30:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:11,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 18:30:11,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:11,500 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:11,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:11,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:11,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:11,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:11,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:11,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:30:11,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:11,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:11,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:11,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:11,542 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 18:30:11,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356040380] [2020-10-28 18:30:11,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:11,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:30:11,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035655965] [2020-10-28 18:30:11,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:30:11,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:11,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:30:11,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:30:11,544 INFO L87 Difference]: Start difference. First operand 3360 states and 4888 transitions. Second operand 6 states. [2020-10-28 18:30:11,802 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:12,289 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:30:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:12,917 INFO L93 Difference]: Finished difference Result 4874 states and 7128 transitions. [2020-10-28 18:30:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:30:12,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:30:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:12,927 INFO L225 Difference]: With dead ends: 4874 [2020-10-28 18:30:12,927 INFO L226 Difference]: Without dead ends: 2472 [2020-10-28 18:30:12,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:30:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2020-10-28 18:30:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 1705. [2020-10-28 18:30:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2020-10-28 18:30:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2455 transitions. [2020-10-28 18:30:13,167 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2455 transitions. Word has length 59 [2020-10-28 18:30:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:13,168 INFO L481 AbstractCegarLoop]: Abstraction has 1705 states and 2455 transitions. [2020-10-28 18:30:13,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:30:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2455 transitions. [2020-10-28 18:30:13,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:30:13,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:13,168 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] [2020-10-28 18:30:13,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:30:13,169 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:13,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:13,169 INFO L82 PathProgramCache]: Analyzing trace with hash -738034022, now seen corresponding path program 1 times [2020-10-28 18:30:13,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:13,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829725664] [2020-10-28 18:30:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:13,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:13,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:13,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:13,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:13,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:14,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:15,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:15,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:30:15,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:15,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2677 [2020-10-28 18:30:15,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:15,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:15,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:30:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:15,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:30:15,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:16,228 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:16,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:16,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:16,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:16,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:16,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:16,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:30:16,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:16,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:16,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:16,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:16,273 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 18:30:16,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829725664] [2020-10-28 18:30:16,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:16,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:30:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546634290] [2020-10-28 18:30:16,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:30:16,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:30:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:30:16,275 INFO L87 Difference]: Start difference. First operand 1705 states and 2455 transitions. Second operand 11 states. [2020-10-28 18:30:16,572 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:30:17,467 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:30:17,715 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:18,867 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:30:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:19,239 INFO L93 Difference]: Finished difference Result 5559 states and 8087 transitions. [2020-10-28 18:30:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 18:30:19,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-28 18:30:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:19,256 INFO L225 Difference]: With dead ends: 5559 [2020-10-28 18:30:19,257 INFO L226 Difference]: Without dead ends: 3999 [2020-10-28 18:30:19,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2020-10-28 18:30:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2020-10-28 18:30:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 1705. [2020-10-28 18:30:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2020-10-28 18:30:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2452 transitions. [2020-10-28 18:30:19,632 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2452 transitions. Word has length 60 [2020-10-28 18:30:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:19,632 INFO L481 AbstractCegarLoop]: Abstraction has 1705 states and 2452 transitions. [2020-10-28 18:30:19,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:30:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2452 transitions. [2020-10-28 18:30:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:30:19,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:19,633 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] [2020-10-28 18:30:19,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:30:19,634 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash 836657653, now seen corresponding path program 1 times [2020-10-28 18:30:19,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:19,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987311565] [2020-10-28 18:30:19,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:19,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:20,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:30:21,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:21,425 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:21,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:21,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:21,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:21,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:30:21,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:21,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:21,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:21,459 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 18:30:21,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987311565] [2020-10-28 18:30:21,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:21,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:30:21,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784966537] [2020-10-28 18:30:21,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:30:21,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:21,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:30:21,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:30:21,462 INFO L87 Difference]: Start difference. First operand 1705 states and 2452 transitions. Second operand 10 states. [2020-10-28 18:30:21,705 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:30:22,698 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:30:22,943 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:30:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:23,795 INFO L93 Difference]: Finished difference Result 3227 states and 4680 transitions. [2020-10-28 18:30:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:30:23,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 18:30:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:23,804 INFO L225 Difference]: With dead ends: 3227 [2020-10-28 18:30:23,804 INFO L226 Difference]: Without dead ends: 2436 [2020-10-28 18:30:23,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:30:23,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2020-10-28 18:30:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1669. [2020-10-28 18:30:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1669 states. [2020-10-28 18:30:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2399 transitions. [2020-10-28 18:30:24,088 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2399 transitions. Word has length 61 [2020-10-28 18:30:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:24,089 INFO L481 AbstractCegarLoop]: Abstraction has 1669 states and 2399 transitions. [2020-10-28 18:30:24,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:30:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2399 transitions. [2020-10-28 18:30:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:30:24,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:24,090 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] [2020-10-28 18:30:24,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:30:24,090 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2065198732, now seen corresponding path program 1 times [2020-10-28 18:30:24,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:24,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374994768] [2020-10-28 18:30:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:24,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:25,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:25,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:30:25,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1161 [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 18:30:25,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:25,673 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:25,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:25,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:25,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:25,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:25,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:25,695 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 18:30:25,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374994768] [2020-10-28 18:30:25,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:25,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 18:30:25,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055332228] [2020-10-28 18:30:25,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 18:30:25,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:25,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 18:30:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:30:25,697 INFO L87 Difference]: Start difference. First operand 1669 states and 2399 transitions. Second operand 10 states. [2020-10-28 18:30:25,941 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:26,799 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:30:27,689 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:30:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:28,009 INFO L93 Difference]: Finished difference Result 3183 states and 4617 transitions. [2020-10-28 18:30:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:30:28,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 18:30:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:28,016 INFO L225 Difference]: With dead ends: 3183 [2020-10-28 18:30:28,016 INFO L226 Difference]: Without dead ends: 2401 [2020-10-28 18:30:28,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-10-28 18:30:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2020-10-28 18:30:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1636. [2020-10-28 18:30:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1636 states. [2020-10-28 18:30:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 2356 transitions. [2020-10-28 18:30:28,363 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 2356 transitions. Word has length 61 [2020-10-28 18:30:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 1636 states and 2356 transitions. [2020-10-28 18:30:28,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 18:30:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 2356 transitions. [2020-10-28 18:30:28,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:30:28,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:28,364 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] [2020-10-28 18:30:28,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:30:28,364 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:28,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1252837005, now seen corresponding path program 1 times [2020-10-28 18:30:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:28,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726140535] [2020-10-28 18:30:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:28,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:28,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:29,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:29,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:30:29,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:30:29,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-28 18:30:29,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:29,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:29,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:30:29,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:30:29,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 18:30:29,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:30,222 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:30,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:30,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:30,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:30,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:30,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:30:30,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:30,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:30,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:30,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:30,247 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 18:30:30,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726140535] [2020-10-28 18:30:30,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:30,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:30:30,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671495748] [2020-10-28 18:30:30,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:30:30,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:30:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:30,249 INFO L87 Difference]: Start difference. First operand 1636 states and 2356 transitions. Second operand 9 states. [2020-10-28 18:30:30,506 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:32,051 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:30:32,318 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:30:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:32,800 INFO L93 Difference]: Finished difference Result 3914 states and 5692 transitions. [2020-10-28 18:30:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:30:32,801 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-28 18:30:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:32,816 INFO L225 Difference]: With dead ends: 3914 [2020-10-28 18:30:32,816 INFO L226 Difference]: Without dead ends: 3138 [2020-10-28 18:30:32,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:30:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2020-10-28 18:30:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1607. [2020-10-28 18:30:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1607 states. [2020-10-28 18:30:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2321 transitions. [2020-10-28 18:30:33,420 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2321 transitions. Word has length 61 [2020-10-28 18:30:33,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:33,420 INFO L481 AbstractCegarLoop]: Abstraction has 1607 states and 2321 transitions. [2020-10-28 18:30:33,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:30:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2321 transitions. [2020-10-28 18:30:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:30:33,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:33,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:33,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:30:33,423 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1922741987, now seen corresponding path program 1 times [2020-10-28 18:30:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105714634] [2020-10-28 18:30:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:36,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:38,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 18:30:38,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:30:38,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:38,715 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:38,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:38,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:38,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:38,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:38,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:38,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:30:38,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:38,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:38,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:38,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:38,739 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 18:30:38,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105714634] [2020-10-28 18:30:38,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:38,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:38,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769333183] [2020-10-28 18:30:38,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:38,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:38,741 INFO L87 Difference]: Start difference. First operand 1607 states and 2321 transitions. Second operand 4 states. [2020-10-28 18:30:38,995 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:40,167 INFO L93 Difference]: Finished difference Result 4461 states and 6469 transitions. [2020-10-28 18:30:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:40,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-28 18:30:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:40,172 INFO L225 Difference]: With dead ends: 4461 [2020-10-28 18:30:40,172 INFO L226 Difference]: Without dead ends: 2954 [2020-10-28 18:30:40,175 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 18:30:40,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-10-28 18:30:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2831. [2020-10-28 18:30:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2831 states. [2020-10-28 18:30:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 4093 transitions. [2020-10-28 18:30:40,859 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 4093 transitions. Word has length 81 [2020-10-28 18:30:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:40,860 INFO L481 AbstractCegarLoop]: Abstraction has 2831 states and 4093 transitions. [2020-10-28 18:30:40,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 4093 transitions. [2020-10-28 18:30:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:30:40,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:40,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:40,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 18:30:40,863 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:40,864 INFO L82 PathProgramCache]: Analyzing trace with hash -810078676, now seen corresponding path program 1 times [2020-10-28 18:30:40,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:40,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354340123] [2020-10-28 18:30:40,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:40,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:41,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:43,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:45,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:30:45,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:30:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:30:45,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:45,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:45,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:45,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 18:30:45,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:30:45,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:46,124 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:46,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:46,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:46,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:46,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 18:30:46,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:46,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:46,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:46,157 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 18:30:46,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354340123] [2020-10-28 18:30:46,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:46,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:46,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67308333] [2020-10-28 18:30:46,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:46,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:46,160 INFO L87 Difference]: Start difference. First operand 2831 states and 4093 transitions. Second operand 4 states. [2020-10-28 18:30:46,402 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:48,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:48,098 INFO L93 Difference]: Finished difference Result 7973 states and 11505 transitions. [2020-10-28 18:30:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:48,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 18:30:48,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:48,116 INFO L225 Difference]: With dead ends: 7973 [2020-10-28 18:30:48,116 INFO L226 Difference]: Without dead ends: 5242 [2020-10-28 18:30:48,122 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 18:30:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2020-10-28 18:30:49,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4959. [2020-10-28 18:30:49,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4959 states. [2020-10-28 18:30:49,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4959 states to 4959 states and 7077 transitions. [2020-10-28 18:30:49,446 INFO L78 Accepts]: Start accepts. Automaton has 4959 states and 7077 transitions. Word has length 82 [2020-10-28 18:30:49,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:49,446 INFO L481 AbstractCegarLoop]: Abstraction has 4959 states and 7077 transitions. [2020-10-28 18:30:49,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4959 states and 7077 transitions. [2020-10-28 18:30:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:30:49,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:49,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:30:49,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 18:30:49,449 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -148417608, now seen corresponding path program 1 times [2020-10-28 18:30:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:49,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072619921] [2020-10-28 18:30:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:49,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:49,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:51,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:54,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:54,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:30:54,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:30:54,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:30:54,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:54,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 18:30:54,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:30:54,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:54,724 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:30:54,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:54,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:54,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:54,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:54,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:54,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:30:54,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:54,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:54,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:54,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:54,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:54,760 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 18:30:54,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072619921] [2020-10-28 18:30:54,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:54,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:54,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965288666] [2020-10-28 18:30:54,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:54,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:54,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:54,762 INFO L87 Difference]: Start difference. First operand 4959 states and 7077 transitions. Second operand 4 states. [2020-10-28 18:30:55,010 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:30:57,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:57,692 INFO L93 Difference]: Finished difference Result 14037 states and 19897 transitions. [2020-10-28 18:30:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:57,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-28 18:30:57,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:57,715 INFO L225 Difference]: With dead ends: 14037 [2020-10-28 18:30:57,716 INFO L226 Difference]: Without dead ends: 9178 [2020-10-28 18:30:57,726 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 18:30:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9178 states. [2020-10-28 18:31:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9178 to 8615. [2020-10-28 18:31:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8615 states. [2020-10-28 18:31:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8615 states to 8615 states and 12045 transitions. [2020-10-28 18:31:00,043 INFO L78 Accepts]: Start accepts. Automaton has 8615 states and 12045 transitions. Word has length 83 [2020-10-28 18:31:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:00,044 INFO L481 AbstractCegarLoop]: Abstraction has 8615 states and 12045 transitions. [2020-10-28 18:31:00,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:31:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8615 states and 12045 transitions. [2020-10-28 18:31:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:31:00,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:00,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:00,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 18:31:00,045 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1039795330, now seen corresponding path program 1 times [2020-10-28 18:31:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:00,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983184592] [2020-10-28 18:31:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:00,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:00,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:00,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:00,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:00,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:01,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:01,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:05,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:31:05,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:31:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:31:05,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:05,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:31:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:31:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 18:31:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:05,293 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:31:05,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:05,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:05,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:31:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:05,329 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 18:31:05,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983184592] [2020-10-28 18:31:05,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:05,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039153489] [2020-10-28 18:31:05,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:31:05,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:31:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:31:05,331 INFO L87 Difference]: Start difference. First operand 8615 states and 12045 transitions. Second operand 6 states. [2020-10-28 18:31:05,583 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:31:06,237 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:31:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:09,071 INFO L93 Difference]: Finished difference Result 19201 states and 26789 transitions. [2020-10-28 18:31:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:31:09,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-28 18:31:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:09,089 INFO L225 Difference]: With dead ends: 19201 [2020-10-28 18:31:09,090 INFO L226 Difference]: Without dead ends: 10686 [2020-10-28 18:31:09,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:31:09,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10686 states. [2020-10-28 18:31:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10686 to 4372. [2020-10-28 18:31:10,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4372 states. [2020-10-28 18:31:10,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 6087 transitions. [2020-10-28 18:31:10,459 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 6087 transitions. Word has length 84 [2020-10-28 18:31:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:10,459 INFO L481 AbstractCegarLoop]: Abstraction has 4372 states and 6087 transitions. [2020-10-28 18:31:10,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:31:10,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 6087 transitions. [2020-10-28 18:31:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 18:31:10,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:10,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:10,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 18:31:10,461 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:10,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1364118109, now seen corresponding path program 1 times [2020-10-28 18:31:10,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:10,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842809903] [2020-10-28 18:31:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:10,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:14,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:14,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 18:31:14,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:31:14,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4063 [2020-10-28 18:31:14,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:14,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:31:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:31:14,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 18:31:14,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:14,836 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:31:14,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:14,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:14,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:14,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:14,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 18:31:14,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:14,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:14,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:14,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:14,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:14,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:14,867 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 18:31:14,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842809903] [2020-10-28 18:31:14,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:14,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:14,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201422854] [2020-10-28 18:31:14,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:31:14,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:14,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:31:14,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:14,869 INFO L87 Difference]: Start difference. First operand 4372 states and 6087 transitions. Second operand 5 states. [2020-10-28 18:31:15,094 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:31:15,577 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:31:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:17,269 INFO L93 Difference]: Finished difference Result 10312 states and 14337 transitions. [2020-10-28 18:31:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:31:17,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 84 [2020-10-28 18:31:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:17,275 INFO L225 Difference]: With dead ends: 10312 [2020-10-28 18:31:17,276 INFO L226 Difference]: Without dead ends: 6013 [2020-10-28 18:31:17,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:31:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6013 states. [2020-10-28 18:31:18,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6013 to 6010. [2020-10-28 18:31:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6010 states. [2020-10-28 18:31:18,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 8237 transitions. [2020-10-28 18:31:18,966 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 8237 transitions. Word has length 84 [2020-10-28 18:31:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:18,967 INFO L481 AbstractCegarLoop]: Abstraction has 6010 states and 8237 transitions. [2020-10-28 18:31:18,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:31:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 8237 transitions. [2020-10-28 18:31:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 18:31:18,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:18,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:18,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 18:31:18,969 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 82838779, now seen corresponding path program 1 times [2020-10-28 18:31:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:18,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47805133] [2020-10-28 18:31:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:19,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:19,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:22,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3804 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 18:31:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:23,050 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:31:23,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:23,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:23,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:23,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:23,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:23,072 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 18:31:23,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47805133] [2020-10-28 18:31:23,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:23,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:31:23,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730742757] [2020-10-28 18:31:23,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:31:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:31:23,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:31:23,074 INFO L87 Difference]: Start difference. First operand 6010 states and 8237 transitions. Second operand 6 states. [2020-10-28 18:31:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:26,733 INFO L93 Difference]: Finished difference Result 10964 states and 14856 transitions. [2020-10-28 18:31:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:31:26,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 18:31:26,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:26,747 INFO L225 Difference]: With dead ends: 10964 [2020-10-28 18:31:26,747 INFO L226 Difference]: Without dead ends: 10961 [2020-10-28 18:31:26,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:31:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2020-10-28 18:31:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 6442. [2020-10-28 18:31:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6442 states. [2020-10-28 18:31:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 8637 transitions. [2020-10-28 18:31:28,670 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 8637 transitions. Word has length 85 [2020-10-28 18:31:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:28,670 INFO L481 AbstractCegarLoop]: Abstraction has 6442 states and 8637 transitions. [2020-10-28 18:31:28,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:31:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 8637 transitions. [2020-10-28 18:31:28,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 18:31:28,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:28,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:28,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 18:31:28,674 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:28,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:28,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1999862708, now seen corresponding path program 1 times [2020-10-28 18:31:28,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:28,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533628993] [2020-10-28 18:31:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:28,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:28,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:33,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:33,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 18:31:33,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:31:33,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 18:31:33,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:33,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:33,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 18:31:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:31:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 18:31:33,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:34,427 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:31:34,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:34,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:34,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:34,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:31:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533628993] [2020-10-28 18:31:34,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:31:34,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 18:31:34,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838062266] [2020-10-28 18:31:34,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 18:31:34,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:34,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 18:31:34,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:31:34,540 INFO L87 Difference]: Start difference. First operand 6442 states and 8637 transitions. Second operand 17 states. [2020-10-28 18:31:35,301 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 159 [2020-10-28 18:31:42,270 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:31:42,667 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:31:42,992 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:31:43,352 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:31:47,939 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-28 18:31:56,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:56,485 INFO L93 Difference]: Finished difference Result 42728 states and 56896 transitions. [2020-10-28 18:31:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-28 18:31:56,486 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 106 [2020-10-28 18:31:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:56,531 INFO L225 Difference]: With dead ends: 42728 [2020-10-28 18:31:56,531 INFO L226 Difference]: Without dead ends: 36365 [2020-10-28 18:31:56,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1251, Invalid=6939, Unknown=0, NotChecked=0, Total=8190 [2020-10-28 18:31:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36365 states. [2020-10-28 18:32:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36365 to 11044. [2020-10-28 18:32:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11044 states. [2020-10-28 18:32:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 14765 transitions. [2020-10-28 18:32:00,496 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 14765 transitions. Word has length 106 [2020-10-28 18:32:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:00,496 INFO L481 AbstractCegarLoop]: Abstraction has 11044 states and 14765 transitions. [2020-10-28 18:32:00,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 18:32:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 14765 transitions. [2020-10-28 18:32:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 18:32:00,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:00,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:00,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 18:32:00,502 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -704642437, now seen corresponding path program 1 times [2020-10-28 18:32:00,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:00,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446520429] [2020-10-28 18:32:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:00,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:00,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:00,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:01,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:01,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:01,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:05,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:05,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 18:32:05,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:32:05,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:32:05,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:05,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 18:32:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:32:05,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 18:32:05,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:05,913 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:32:05,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:05,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:05,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:32:05,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:05,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446520429] [2020-10-28 18:32:05,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:32:05,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 18:32:05,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035024315] [2020-10-28 18:32:05,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 18:32:05,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:05,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 18:32:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:32:05,963 INFO L87 Difference]: Start difference. First operand 11044 states and 14765 transitions. Second operand 12 states. [2020-10-28 18:32:06,346 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 18:32:11,089 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:32:11,488 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:32:11,916 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:32:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:29,076 INFO L93 Difference]: Finished difference Result 62880 states and 83136 transitions. [2020-10-28 18:32:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 18:32:29,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 107 [2020-10-28 18:32:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:29,151 INFO L225 Difference]: With dead ends: 62880 [2020-10-28 18:32:29,151 INFO L226 Difference]: Without dead ends: 51933 [2020-10-28 18:32:29,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2020-10-28 18:32:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51933 states.