/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:40:47,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:40:47,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:40:47,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:40:47,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:40:47,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:40:47,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:40:47,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:40:47,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:40:47,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:40:47,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:40:47,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:40:47,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:40:47,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:40:47,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:40:47,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:40:47,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:40:47,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:40:47,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:40:47,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:40:47,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:40:47,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:40:47,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:40:47,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:40:47,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:40:47,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:40:47,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:40:47,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:40:47,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:40:47,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:40:48,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:40:48,003 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:40:48,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:40:48,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:40:48,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:40:48,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:40:48,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:40:48,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:40:48,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:40:48,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:40:48,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:40:48,010 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 [2020-10-27 23:40:48,045 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:40:48,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:40:48,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:40:48,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:40:48,047 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:40:48,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:40:48,048 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:40:48,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:40:48,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:40:48,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:40:48,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:40:48,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:40:48,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:40:48,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:40:48,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:40:48,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:40:48,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:40:48,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:40:48,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:40:48,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:40:48,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:40:48,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:40:48,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:40:48,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:40:48,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:40:48,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:40:48,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:40:48,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:40:48,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:40:48,052 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:40:48,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:40:48,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:40:48,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:40:48,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:40:48,463 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:40:48,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:40:48,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50ec539c2/c011ae525fbf4ce0b0329def6a923e14/FLAG8bb28f566 [2020-10-27 23:40:49,263 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:40:49,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:40:49,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50ec539c2/c011ae525fbf4ce0b0329def6a923e14/FLAG8bb28f566 [2020-10-27 23:40:49,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50ec539c2/c011ae525fbf4ce0b0329def6a923e14 [2020-10-27 23:40:49,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:40:49,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:40:49,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:40:49,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:40:49,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:40:49,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:40:49" (1/1) ... [2020-10-27 23:40:49,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca0bb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:49, skipping insertion in model container [2020-10-27 23:40:49,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:40:49" (1/1) ... [2020-10-27 23:40:49,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:40:49,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:40:50,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:40:50,072 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:40:50,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:40:50,288 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:40:50,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50 WrapperNode [2020-10-27 23:40:50,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:40:50,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:40:50,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:40:50,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:40:50,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (1/1) ... [2020-10-27 23:40:50,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:40:50,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:40:50,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:40:50,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:40:50,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (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 [2020-10-27 23:40:50,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:40:50,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:40:50,472 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:40:50,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:40:50,473 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:40:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:40:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:40:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:40:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:40:50,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:40:50,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:40:50,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:40:50,479 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:40:50,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:40:50,479 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:40:50,480 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:40:50,480 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:40:50,480 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:40:50,480 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:40:50,480 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:40:50,480 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:40:50,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:40:51,546 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:40:51,546 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:40:51,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:40:51 BoogieIcfgContainer [2020-10-27 23:40:51,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:40:51,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:40:51,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:40:51,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:40:51,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:40:49" (1/3) ... [2020-10-27 23:40:51,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3279c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:40:51, skipping insertion in model container [2020-10-27 23:40:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:40:50" (2/3) ... [2020-10-27 23:40:51,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3279c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:40:51, skipping insertion in model container [2020-10-27 23:40:51,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:40:51" (3/3) ... [2020-10-27 23:40:51,558 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:40:51,571 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:40:51,577 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:40:51,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:40:51,622 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:40:51,622 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:40:51,622 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:40:51,622 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:40:51,622 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:40:51,622 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:40:51,623 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:40:51,623 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:40:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-10-27 23:40:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 23:40:51,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:40:51,659 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] [2020-10-27 23:40:51,659 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:40:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:40:51,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1835724327, now seen corresponding path program 1 times [2020-10-27 23:40:51,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:40:51,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392836082] [2020-10-27 23:40:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:40:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:52,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:52,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:53,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:54,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:57,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:57,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 23:40:57,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:40:57,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 23:40:57,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:40:57,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:40:57,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:40:57,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:40:57,491 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:40:57,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:40:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:40:57,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:40:57,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:40:57,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:40:57,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:40:57,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:40:57,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:40:57,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:40:57,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:40:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:40:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:40:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:40:57,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392836082] [2020-10-27 23:40:57,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:40:57,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:40:57,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000483857] [2020-10-27 23:40:57,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:40:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:40:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:40:57,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:40:57,598 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 9 states. [2020-10-27 23:40:58,030 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-10-27 23:40:59,918 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:41:01,855 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:01,923 INFO L93 Difference]: Finished difference Result 510 states and 827 transitions. [2020-10-27 23:41:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:41:01,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-27 23:41:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:01,961 INFO L225 Difference]: With dead ends: 510 [2020-10-27 23:41:01,962 INFO L226 Difference]: Without dead ends: 410 [2020-10-27 23:41:01,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2020-10-27 23:41:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-27 23:41:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 224. [2020-10-27 23:41:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-27 23:41:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2020-10-27 23:41:02,064 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 51 [2020-10-27 23:41:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:02,065 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2020-10-27 23:41:02,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:41:02,065 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2020-10-27 23:41:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 23:41:02,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:02,069 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] [2020-10-27 23:41:02,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:41:02,070 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:02,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1735177672, now seen corresponding path program 1 times [2020-10-27 23:41:02,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:02,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279872850] [2020-10-27 23:41:02,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:02,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:03,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:07,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 23:41:07,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:41:07,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:41:07,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:41:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:41:07,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 23:41:07,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:07,528 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:07,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:07,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:07,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:07,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:07,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:07,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:41:07,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:07,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:07,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:07,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279872850] [2020-10-27 23:41:07,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:07,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:41:07,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056183894] [2020-10-27 23:41:07,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:41:07,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:07,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:41:07,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:07,578 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand 7 states. [2020-10-27 23:41:07,875 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:08,859 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:41:09,135 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:09,475 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:09,745 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:10,451 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:10,733 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:41:11,153 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:41:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:11,196 INFO L93 Difference]: Finished difference Result 916 states and 1277 transitions. [2020-10-27 23:41:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:41:11,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-27 23:41:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:11,207 INFO L225 Difference]: With dead ends: 916 [2020-10-27 23:41:11,207 INFO L226 Difference]: Without dead ends: 774 [2020-10-27 23:41:11,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:41:11,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-27 23:41:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 375. [2020-10-27 23:41:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-10-27 23:41:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 518 transitions. [2020-10-27 23:41:11,263 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 518 transitions. Word has length 51 [2020-10-27 23:41:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:11,263 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 518 transitions. [2020-10-27 23:41:11,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:41:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 518 transitions. [2020-10-27 23:41:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:11,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:11,267 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] [2020-10-27 23:41:11,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:41:11,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:11,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2094149536, now seen corresponding path program 1 times [2020-10-27 23:41:11,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:11,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734716489] [2020-10-27 23:41:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:11,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:11,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:11,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:12,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:12,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:13,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:15,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:16,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:16,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-27 23:41:16,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:41:16,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:16,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:41:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:16,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:41:16,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:41:16,610 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:16,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:16,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:16,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:16,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:16,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:16,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:41:16,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:16,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:16,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:16,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 23:41:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:16,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734716489] [2020-10-27 23:41:16,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:16,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:41:16,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577134937] [2020-10-27 23:41:16,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:41:16,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:16,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:41:16,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:41:16,689 INFO L87 Difference]: Start difference. First operand 375 states and 518 transitions. Second operand 7 states. [2020-10-27 23:41:17,004 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:17,952 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 23:41:18,274 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:18,567 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:18,830 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:19,650 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:41:19,919 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:20,309 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:41:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:20,338 INFO L93 Difference]: Finished difference Result 1665 states and 2416 transitions. [2020-10-27 23:41:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 23:41:20,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-10-27 23:41:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:20,348 INFO L225 Difference]: With dead ends: 1665 [2020-10-27 23:41:20,348 INFO L226 Difference]: Without dead ends: 1465 [2020-10-27 23:41:20,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:41:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2020-10-27 23:41:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 595. [2020-10-27 23:41:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-10-27 23:41:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 845 transitions. [2020-10-27 23:41:20,436 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 845 transitions. Word has length 52 [2020-10-27 23:41:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 845 transitions. [2020-10-27 23:41:20,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:41:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 845 transitions. [2020-10-27 23:41:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:20,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:20,447 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] [2020-10-27 23:41:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:41:20,448 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash -814936231, now seen corresponding path program 1 times [2020-10-27 23:41:20,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062082021] [2020-10-27 23:41:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:21,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:23,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:25,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:25,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-27 23:41:25,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-27 23:41:25,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:25,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:25,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:25,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:41:25,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:25,799 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:25,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:25,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:25,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:25,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:25,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:25,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062082021] [2020-10-27 23:41:25,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:25,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:25,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482011157] [2020-10-27 23:41:25,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:25,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:25,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:25,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:25,847 INFO L87 Difference]: Start difference. First operand 595 states and 845 transitions. Second operand 6 states. [2020-10-27 23:41:26,134 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:27,124 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:27,457 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:28,470 INFO L93 Difference]: Finished difference Result 2394 states and 3534 transitions. [2020-10-27 23:41:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 23:41:28,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-10-27 23:41:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:28,487 INFO L225 Difference]: With dead ends: 2394 [2020-10-27 23:41:28,491 INFO L226 Difference]: Without dead ends: 2116 [2020-10-27 23:41:28,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:28,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2020-10-27 23:41:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1419. [2020-10-27 23:41:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1419 states. [2020-10-27 23:41:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2065 transitions. [2020-10-27 23:41:28,635 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2065 transitions. Word has length 52 [2020-10-27 23:41:28,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:28,636 INFO L481 AbstractCegarLoop]: Abstraction has 1419 states and 2065 transitions. [2020-10-27 23:41:28,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2065 transitions. [2020-10-27 23:41:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 23:41:28,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:28,639 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] [2020-10-27 23:41:28,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:41:28,640 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:28,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:28,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1904387001, now seen corresponding path program 1 times [2020-10-27 23:41:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:28,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240614302] [2020-10-27 23:41:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:28,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:29,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:31,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:32,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:33,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:33,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 23:41:33,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-27 23:41:33,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:41:33,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:33,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:41:33,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:41:33,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:41:33,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:41:34,099 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:34,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:34,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:34,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:34,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:34,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:34,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:41:34,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:34,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:34,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240614302] [2020-10-27 23:41:34,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:34,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:41:34,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43182033] [2020-10-27 23:41:34,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:41:34,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:34,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:41:34,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:41:34,137 INFO L87 Difference]: Start difference. First operand 1419 states and 2065 transitions. Second operand 9 states. [2020-10-27 23:41:34,435 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:35,403 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:36,358 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:36,628 INFO L93 Difference]: Finished difference Result 4995 states and 7423 transitions. [2020-10-27 23:41:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 23:41:36,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2020-10-27 23:41:36,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:36,653 INFO L225 Difference]: With dead ends: 4995 [2020-10-27 23:41:36,653 INFO L226 Difference]: Without dead ends: 4501 [2020-10-27 23:41:36,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-27 23:41:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2020-10-27 23:41:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 1387. [2020-10-27 23:41:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1387 states. [2020-10-27 23:41:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2021 transitions. [2020-10-27 23:41:36,834 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2021 transitions. Word has length 52 [2020-10-27 23:41:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:36,835 INFO L481 AbstractCegarLoop]: Abstraction has 1387 states and 2021 transitions. [2020-10-27 23:41:36,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:41:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2021 transitions. [2020-10-27 23:41:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:41:36,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:36,837 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] [2020-10-27 23:41:36,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:41:36,837 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1854663768, now seen corresponding path program 1 times [2020-10-27 23:41:36,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:36,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683273768] [2020-10-27 23:41:36,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:36,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:36,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:37,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:38,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:41,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:41,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:41,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 23:41:41,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:41:41,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:41:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:41:41,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:41:41,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:42,199 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:42,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:42,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:42,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:42,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:42,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:41:42,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:42,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:42,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:42,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:42,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683273768] [2020-10-27 23:41:42,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:42,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:41:42,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647931167] [2020-10-27 23:41:42,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:41:42,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:42,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:41:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:41:42,261 INFO L87 Difference]: Start difference. First operand 1387 states and 2021 transitions. Second operand 6 states. [2020-10-27 23:41:42,538 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:43,704 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:41:44,079 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:45,359 INFO L93 Difference]: Finished difference Result 6851 states and 10309 transitions. [2020-10-27 23:41:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:41:45,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:41:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:45,392 INFO L225 Difference]: With dead ends: 6851 [2020-10-27 23:41:45,392 INFO L226 Difference]: Without dead ends: 6007 [2020-10-27 23:41:45,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:41:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6007 states. [2020-10-27 23:41:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6007 to 2615. [2020-10-27 23:41:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2020-10-27 23:41:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3860 transitions. [2020-10-27 23:41:45,739 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3860 transitions. Word has length 53 [2020-10-27 23:41:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:45,740 INFO L481 AbstractCegarLoop]: Abstraction has 2615 states and 3860 transitions. [2020-10-27 23:41:45,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:41:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3860 transitions. [2020-10-27 23:41:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:41:45,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:45,742 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] [2020-10-27 23:41:45,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:41:45,742 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1306243887, now seen corresponding path program 1 times [2020-10-27 23:41:45,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:45,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404358671] [2020-10-27 23:41:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:45,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:45,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:46,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:47,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:48,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:49,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:41:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:51,242 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:41:51,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:41:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:51,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:41:51,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:41:51,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:41:51,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:41:51,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:41:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:41:51,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:41:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:41:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:41:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:41:51,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404358671] [2020-10-27 23:41:51,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:41:51,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:41:51,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623041044] [2020-10-27 23:41:51,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:41:51,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:41:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:41:51,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:41:51,284 INFO L87 Difference]: Start difference. First operand 2615 states and 3860 transitions. Second operand 12 states. [2020-10-27 23:41:52,082 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 182 [2020-10-27 23:41:53,741 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:41:54,152 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:41:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:41:55,783 INFO L93 Difference]: Finished difference Result 7669 states and 11608 transitions. [2020-10-27 23:41:55,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 23:41:55,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-27 23:41:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:41:55,818 INFO L225 Difference]: With dead ends: 7669 [2020-10-27 23:41:55,818 INFO L226 Difference]: Without dead ends: 6713 [2020-10-27 23:41:55,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2020-10-27 23:41:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6713 states. [2020-10-27 23:41:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6713 to 2615. [2020-10-27 23:41:56,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2020-10-27 23:41:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3859 transitions. [2020-10-27 23:41:56,114 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3859 transitions. Word has length 53 [2020-10-27 23:41:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:41:56,115 INFO L481 AbstractCegarLoop]: Abstraction has 2615 states and 3859 transitions. [2020-10-27 23:41:56,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:41:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3859 transitions. [2020-10-27 23:41:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:41:56,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:41:56,117 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] [2020-10-27 23:41:56,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:41:56,117 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:41:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:41:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1406790542, now seen corresponding path program 1 times [2020-10-27 23:41:56,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:41:56,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137076421] [2020-10-27 23:41:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:41:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:41:56,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:56,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:57,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:58,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:41:59,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:01,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:42:01,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:01,429 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:01,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:01,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:01,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:01,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:01,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137076421] [2020-10-27 23:42:01,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:01,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845112231] [2020-10-27 23:42:01,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:01,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:01,454 INFO L87 Difference]: Start difference. First operand 2615 states and 3859 transitions. Second operand 6 states. [2020-10-27 23:42:01,733 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:02,824 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:03,232 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:04,987 INFO L93 Difference]: Finished difference Result 10584 states and 16114 transitions. [2020-10-27 23:42:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:04,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:42:04,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:05,027 INFO L225 Difference]: With dead ends: 10584 [2020-10-27 23:42:05,027 INFO L226 Difference]: Without dead ends: 9617 [2020-10-27 23:42:05,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:05,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9617 states. [2020-10-27 23:42:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9617 to 4072. [2020-10-27 23:42:05,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4072 states. [2020-10-27 23:42:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 6079 transitions. [2020-10-27 23:42:05,648 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 6079 transitions. Word has length 53 [2020-10-27 23:42:05,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:05,649 INFO L481 AbstractCegarLoop]: Abstraction has 4072 states and 6079 transitions. [2020-10-27 23:42:05,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 6079 transitions. [2020-10-27 23:42:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:05,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:05,651 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] [2020-10-27 23:42:05,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:42:05,652 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -168853522, now seen corresponding path program 1 times [2020-10-27 23:42:05,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:05,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005279517] [2020-10-27 23:42:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:05,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:05,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:06,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:07,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:08,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:09,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:10,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:10,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:10,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 23:42:10,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:42:10,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:42:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 23:42:10,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:11,044 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:11,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:11,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:11,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:11,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:11,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:42:11,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:11,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:11,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:11,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:11,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:11,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005279517] [2020-10-27 23:42:11,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:11,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:11,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25372968] [2020-10-27 23:42:11,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:11,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:11,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:11,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:11,079 INFO L87 Difference]: Start difference. First operand 4072 states and 6079 transitions. Second operand 9 states. [2020-10-27 23:42:11,377 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:42:12,473 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:13,396 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:13,968 INFO L93 Difference]: Finished difference Result 11252 states and 16955 transitions. [2020-10-27 23:42:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 23:42:13,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 23:42:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:13,989 INFO L225 Difference]: With dead ends: 11252 [2020-10-27 23:42:13,989 INFO L226 Difference]: Without dead ends: 8057 [2020-10-27 23:42:14,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:42:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2020-10-27 23:42:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 4022. [2020-10-27 23:42:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4022 states. [2020-10-27 23:42:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4022 states to 4022 states and 5977 transitions. [2020-10-27 23:42:14,474 INFO L78 Accepts]: Start accepts. Automaton has 4022 states and 5977 transitions. Word has length 53 [2020-10-27 23:42:14,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:14,474 INFO L481 AbstractCegarLoop]: Abstraction has 4022 states and 5977 transitions. [2020-10-27 23:42:14,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:14,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4022 states and 5977 transitions. [2020-10-27 23:42:14,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:14,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:14,476 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] [2020-10-27 23:42:14,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:42:14,476 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash 726794710, now seen corresponding path program 1 times [2020-10-27 23:42:14,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:14,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029986943] [2020-10-27 23:42:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:14,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:14,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:15,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:17,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:18,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:42:19,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:19,859 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:19,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:19,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:19,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:19,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:19,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:19,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:19,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:19,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:19,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:19,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029986943] [2020-10-27 23:42:19,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:19,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:42:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000089376] [2020-10-27 23:42:19,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:42:19,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:42:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:42:19,941 INFO L87 Difference]: Start difference. First operand 4022 states and 5977 transitions. Second operand 9 states. [2020-10-27 23:42:20,230 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:21,463 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:42:22,814 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:23,577 INFO L93 Difference]: Finished difference Result 13886 states and 20853 transitions. [2020-10-27 23:42:23,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:42:23,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-27 23:42:23,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:23,603 INFO L225 Difference]: With dead ends: 13886 [2020-10-27 23:42:23,603 INFO L226 Difference]: Without dead ends: 10469 [2020-10-27 23:42:23,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2020-10-27 23:42:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10469 states. [2020-10-27 23:42:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10469 to 3244. [2020-10-27 23:42:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3244 states. [2020-10-27 23:42:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4806 transitions. [2020-10-27 23:42:24,082 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4806 transitions. Word has length 53 [2020-10-27 23:42:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:24,082 INFO L481 AbstractCegarLoop]: Abstraction has 3244 states and 4806 transitions. [2020-10-27 23:42:24,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:42:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4806 transitions. [2020-10-27 23:42:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 23:42:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:24,084 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] [2020-10-27 23:42:24,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:42:24,085 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -848849354, now seen corresponding path program 1 times [2020-10-27 23:42:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:24,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272508467] [2020-10-27 23:42:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:24,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:25,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:27,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:29,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 23:42:29,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:42:29,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:42:29,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:29,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:42:29,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:29,407 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:29,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:29,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:29,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:29,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:29,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:29,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:29,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:29,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272508467] [2020-10-27 23:42:29,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:29,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057898723] [2020-10-27 23:42:29,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:29,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:29,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:29,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:29,431 INFO L87 Difference]: Start difference. First operand 3244 states and 4806 transitions. Second operand 6 states. [2020-10-27 23:42:29,732 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:30,918 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:31,219 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:31,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:31,914 INFO L93 Difference]: Finished difference Result 4197 states and 6218 transitions. [2020-10-27 23:42:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:31,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-27 23:42:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:31,926 INFO L225 Difference]: With dead ends: 4197 [2020-10-27 23:42:31,926 INFO L226 Difference]: Without dead ends: 4192 [2020-10-27 23:42:31,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2020-10-27 23:42:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 3248. [2020-10-27 23:42:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2020-10-27 23:42:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4812 transitions. [2020-10-27 23:42:32,460 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4812 transitions. Word has length 53 [2020-10-27 23:42:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:32,460 INFO L481 AbstractCegarLoop]: Abstraction has 3248 states and 4812 transitions. [2020-10-27 23:42:32,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4812 transitions. [2020-10-27 23:42:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:32,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:32,462 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] [2020-10-27 23:42:32,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:42:32,462 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash -104077909, now seen corresponding path program 1 times [2020-10-27 23:42:32,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:32,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742167949] [2020-10-27 23:42:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:32,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:32,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:33,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:34,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:35,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:36,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:37,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:37,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:37,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:42:37,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:37,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:42:37,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:42:37,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 23:42:37,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 23:42:37,857 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:37,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:37,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:37,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:37,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742167949] [2020-10-27 23:42:37,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:37,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:42:37,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830884261] [2020-10-27 23:42:37,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:42:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:37,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:42:37,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:42:37,882 INFO L87 Difference]: Start difference. First operand 3248 states and 4812 transitions. Second operand 10 states. [2020-10-27 23:42:38,246 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 23:42:40,142 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:42,619 INFO L93 Difference]: Finished difference Result 11839 states and 17753 transitions. [2020-10-27 23:42:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 23:42:42,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:42:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:42,639 INFO L225 Difference]: With dead ends: 11839 [2020-10-27 23:42:42,640 INFO L226 Difference]: Without dead ends: 11832 [2020-10-27 23:42:42,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 23:42:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11832 states. [2020-10-27 23:42:43,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11832 to 3248. [2020-10-27 23:42:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3248 states. [2020-10-27 23:42:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 4807 transitions. [2020-10-27 23:42:43,170 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 4807 transitions. Word has length 54 [2020-10-27 23:42:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:43,170 INFO L481 AbstractCegarLoop]: Abstraction has 3248 states and 4807 transitions. [2020-10-27 23:42:43,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:42:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 4807 transitions. [2020-10-27 23:42:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:43,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:43,172 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] [2020-10-27 23:42:43,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:42:43,172 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1000981818, now seen corresponding path program 1 times [2020-10-27 23:42:43,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:43,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043051420] [2020-10-27 23:42:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:43,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 23:42:48,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:48,488 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:48,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:48,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:48,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043051420] [2020-10-27 23:42:48,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:48,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:42:48,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335088137] [2020-10-27 23:42:48,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:42:48,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:42:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:42:48,516 INFO L87 Difference]: Start difference. First operand 3248 states and 4807 transitions. Second operand 6 states. [2020-10-27 23:42:48,806 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:50,111 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:42:50,482 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:42:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:42:52,257 INFO L93 Difference]: Finished difference Result 7624 states and 11444 transitions. [2020-10-27 23:42:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:42:52,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 23:42:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:42:52,276 INFO L225 Difference]: With dead ends: 7624 [2020-10-27 23:42:52,276 INFO L226 Difference]: Without dead ends: 7606 [2020-10-27 23:42:52,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:42:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7606 states. [2020-10-27 23:42:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7606 to 3246. [2020-10-27 23:42:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2020-10-27 23:42:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4803 transitions. [2020-10-27 23:42:52,924 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4803 transitions. Word has length 54 [2020-10-27 23:42:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:42:52,924 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states and 4803 transitions. [2020-10-27 23:42:52,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:42:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4803 transitions. [2020-10-27 23:42:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:42:52,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:42:52,926 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] [2020-10-27 23:42:52,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:42:52,926 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:42:52,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:42:52,927 INFO L82 PathProgramCache]: Analyzing trace with hash -606016130, now seen corresponding path program 1 times [2020-10-27 23:42:52,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:42:52,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510976934] [2020-10-27 23:42:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:42:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:52,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:53,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:54,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:57,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:42:57,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:58,387 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:42:58,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:42:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:42:58,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:42:58,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:42:58,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:42:58,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:42:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:42:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:42:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:42:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:42:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:42:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:42:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:42:58,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510976934] [2020-10-27 23:42:58,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:42:58,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 23:42:58,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168623312] [2020-10-27 23:42:58,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 23:42:58,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:42:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 23:42:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 23:42:58,422 INFO L87 Difference]: Start difference. First operand 3246 states and 4803 transitions. Second operand 12 states. [2020-10-27 23:42:59,092 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 172 [2020-10-27 23:43:01,619 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 172 [2020-10-27 23:43:01,967 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:03,239 INFO L93 Difference]: Finished difference Result 5058 states and 7473 transitions. [2020-10-27 23:43:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 23:43:03,239 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2020-10-27 23:43:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:03,245 INFO L225 Difference]: With dead ends: 5058 [2020-10-27 23:43:03,245 INFO L226 Difference]: Without dead ends: 5050 [2020-10-27 23:43:03,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2020-10-27 23:43:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2020-10-27 23:43:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3246. [2020-10-27 23:43:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3246 states. [2020-10-27 23:43:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 4802 transitions. [2020-10-27 23:43:03,775 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 4802 transitions. Word has length 54 [2020-10-27 23:43:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:03,775 INFO L481 AbstractCegarLoop]: Abstraction has 3246 states and 4802 transitions. [2020-10-27 23:43:03,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 23:43:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 4802 transitions. [2020-10-27 23:43:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:03,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:03,777 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] [2020-10-27 23:43:03,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:43:03,777 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash -531791454, now seen corresponding path program 1 times [2020-10-27 23:43:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:03,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448119883] [2020-10-27 23:43:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:03,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:04,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:07,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:08,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:43:08,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:09,193 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:09,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:09,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:09,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:09,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:09,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448119883] [2020-10-27 23:43:09,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:09,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:09,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473145079] [2020-10-27 23:43:09,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:09,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:09,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:09,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:09,223 INFO L87 Difference]: Start difference. First operand 3246 states and 4802 transitions. Second operand 10 states. [2020-10-27 23:43:09,530 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:10,740 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 23:43:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:11,684 INFO L93 Difference]: Finished difference Result 6429 states and 9648 transitions. [2020-10-27 23:43:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:11,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:43:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:11,690 INFO L225 Difference]: With dead ends: 6429 [2020-10-27 23:43:11,690 INFO L226 Difference]: Without dead ends: 4687 [2020-10-27 23:43:11,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:43:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2020-10-27 23:43:12,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3220. [2020-10-27 23:43:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3220 states. [2020-10-27 23:43:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 4762 transitions. [2020-10-27 23:43:12,115 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 4762 transitions. Word has length 54 [2020-10-27 23:43:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:12,115 INFO L481 AbstractCegarLoop]: Abstraction has 3220 states and 4762 transitions. [2020-10-27 23:43:12,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 4762 transitions. [2020-10-27 23:43:12,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:12,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:12,117 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] [2020-10-27 23:43:12,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:43:12,117 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash -431244799, now seen corresponding path program 1 times [2020-10-27 23:43:12,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:12,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650097735] [2020-10-27 23:43:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:12,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:14,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:15,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:16,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:17,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:43:17,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:17,661 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:17,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:17,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:17,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:17,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:17,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:17,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:43:17,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:17,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:17,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:17,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650097735] [2020-10-27 23:43:17,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:17,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:17,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027583474] [2020-10-27 23:43:17,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:17,698 INFO L87 Difference]: Start difference. First operand 3220 states and 4762 transitions. Second operand 11 states. [2020-10-27 23:43:18,566 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 185 [2020-10-27 23:43:20,019 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:22,097 INFO L93 Difference]: Finished difference Result 7624 states and 11415 transitions. [2020-10-27 23:43:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 23:43:22,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-10-27 23:43:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:22,106 INFO L225 Difference]: With dead ends: 7624 [2020-10-27 23:43:22,106 INFO L226 Difference]: Without dead ends: 7618 [2020-10-27 23:43:22,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:43:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7618 states. [2020-10-27 23:43:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7618 to 3220. [2020-10-27 23:43:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3220 states. [2020-10-27 23:43:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3220 states to 3220 states and 4761 transitions. [2020-10-27 23:43:22,570 INFO L78 Accepts]: Start accepts. Automaton has 3220 states and 4761 transitions. Word has length 54 [2020-10-27 23:43:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:22,570 INFO L481 AbstractCegarLoop]: Abstraction has 3220 states and 4761 transitions. [2020-10-27 23:43:22,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3220 states and 4761 transitions. [2020-10-27 23:43:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 23:43:22,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:22,572 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] [2020-10-27 23:43:22,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 23:43:22,572 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:22,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:22,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2006888863, now seen corresponding path program 1 times [2020-10-27 23:43:22,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:22,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303268293] [2020-10-27 23:43:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:22,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:22,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:23,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:23,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:23,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:25,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:26,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:26,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:27,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:43:27,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:28,016 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:28,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:28,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:28,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:28,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:28,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:28,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303268293] [2020-10-27 23:43:28,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:28,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:43:28,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301988616] [2020-10-27 23:43:28,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:43:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:43:28,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:43:28,041 INFO L87 Difference]: Start difference. First operand 3220 states and 4761 transitions. Second operand 10 states. [2020-10-27 23:43:28,412 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 23:43:29,702 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:30,776 INFO L93 Difference]: Finished difference Result 4696 states and 6960 transitions. [2020-10-27 23:43:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 23:43:30,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 23:43:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:30,781 INFO L225 Difference]: With dead ends: 4696 [2020-10-27 23:43:30,781 INFO L226 Difference]: Without dead ends: 4691 [2020-10-27 23:43:30,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:43:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2020-10-27 23:43:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3222. [2020-10-27 23:43:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3222 states. [2020-10-27 23:43:31,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 4764 transitions. [2020-10-27 23:43:31,196 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 4764 transitions. Word has length 54 [2020-10-27 23:43:31,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:31,197 INFO L481 AbstractCegarLoop]: Abstraction has 3222 states and 4764 transitions. [2020-10-27 23:43:31,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:43:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 4764 transitions. [2020-10-27 23:43:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:31,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:31,198 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] [2020-10-27 23:43:31,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 23:43:31,199 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:31,199 INFO L82 PathProgramCache]: Analyzing trace with hash -58981995, now seen corresponding path program 1 times [2020-10-27 23:43:31,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:31,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352415665] [2020-10-27 23:43:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:31,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:31,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:35,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:43:36,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 23:43:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:36,637 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:36,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:36,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:36,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:36,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:36,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352415665] [2020-10-27 23:43:36,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:36,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328001784] [2020-10-27 23:43:36,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:36,664 INFO L87 Difference]: Start difference. First operand 3222 states and 4764 transitions. Second operand 11 states. [2020-10-27 23:43:36,975 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:38,372 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:43:38,695 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-27 23:43:40,121 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:43:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:40,694 INFO L93 Difference]: Finished difference Result 7241 states and 10597 transitions. [2020-10-27 23:43:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 23:43:40,695 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:43:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:40,703 INFO L225 Difference]: With dead ends: 7241 [2020-10-27 23:43:40,703 INFO L226 Difference]: Without dead ends: 7236 [2020-10-27 23:43:40,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-27 23:43:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7236 states. [2020-10-27 23:43:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7236 to 3215. [2020-10-27 23:43:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3215 states. [2020-10-27 23:43:41,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 4754 transitions. [2020-10-27 23:43:41,224 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 4754 transitions. Word has length 55 [2020-10-27 23:43:41,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:41,224 INFO L481 AbstractCegarLoop]: Abstraction has 3215 states and 4754 transitions. [2020-10-27 23:43:41,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:41,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 4754 transitions. [2020-10-27 23:43:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:41,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:41,225 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] [2020-10-27 23:43:41,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 23:43:41,225 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:41,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1397358309, now seen corresponding path program 1 times [2020-10-27 23:43:41,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196194510] [2020-10-27 23:43:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:41,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:41,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:42,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:43,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:44,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:45,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 23:43:46,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:46,549 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:46,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:46,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:46,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:46,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:46,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:46,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:46,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:46,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:46,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:46,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196194510] [2020-10-27 23:43:46,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:46,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:43:46,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773773660] [2020-10-27 23:43:46,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:43:46,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:43:46,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:43:46,575 INFO L87 Difference]: Start difference. First operand 3215 states and 4754 transitions. Second operand 6 states. [2020-10-27 23:43:46,886 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:48,029 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:43:48,298 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:49,246 INFO L93 Difference]: Finished difference Result 5065 states and 7555 transitions. [2020-10-27 23:43:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:43:49,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 23:43:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:49,251 INFO L225 Difference]: With dead ends: 5065 [2020-10-27 23:43:49,251 INFO L226 Difference]: Without dead ends: 4155 [2020-10-27 23:43:49,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 23:43:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2020-10-27 23:43:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3198. [2020-10-27 23:43:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3198 states. [2020-10-27 23:43:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4729 transitions. [2020-10-27 23:43:49,810 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4729 transitions. Word has length 55 [2020-10-27 23:43:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:49,810 INFO L481 AbstractCegarLoop]: Abstraction has 3198 states and 4729 transitions. [2020-10-27 23:43:49,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:43:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4729 transitions. [2020-10-27 23:43:49,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:49,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:49,812 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] [2020-10-27 23:43:49,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 23:43:49,812 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash 821104462, now seen corresponding path program 1 times [2020-10-27 23:43:49,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:49,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017895296] [2020-10-27 23:43:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:49,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:49,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:51,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:51,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:52,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:52,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:52,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:53,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:54,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:54,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:43:54,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-27 23:43:54,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 23:43:54,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:43:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 23:43:54,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 23:43:54,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:55,242 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:43:55,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:43:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:55,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:55,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:43:55,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:43:55,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:43:55,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:43:55,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:43:55,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:43:55,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:43:55,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:43:55,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:43:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:43:55,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017895296] [2020-10-27 23:43:55,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:43:55,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:43:55,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111404443] [2020-10-27 23:43:55,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:43:55,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:43:55,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:43:55,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:43:55,266 INFO L87 Difference]: Start difference. First operand 3198 states and 4729 transitions. Second operand 11 states. [2020-10-27 23:43:55,572 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 23:43:56,804 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:43:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:43:57,966 INFO L93 Difference]: Finished difference Result 6189 states and 9266 transitions. [2020-10-27 23:43:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 23:43:57,966 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:43:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:43:57,973 INFO L225 Difference]: With dead ends: 6189 [2020-10-27 23:43:57,973 INFO L226 Difference]: Without dead ends: 4670 [2020-10-27 23:43:57,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-27 23:43:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4670 states. [2020-10-27 23:43:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4670 to 3190. [2020-10-27 23:43:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3190 states. [2020-10-27 23:43:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 4716 transitions. [2020-10-27 23:43:58,451 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 4716 transitions. Word has length 55 [2020-10-27 23:43:58,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:43:58,451 INFO L481 AbstractCegarLoop]: Abstraction has 3190 states and 4716 transitions. [2020-10-27 23:43:58,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:43:58,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 4716 transitions. [2020-10-27 23:43:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:43:58,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:43:58,453 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] [2020-10-27 23:43:58,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 23:43:58,453 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:43:58,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:43:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -72658479, now seen corresponding path program 1 times [2020-10-27 23:43:58,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:43:58,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216486213] [2020-10-27 23:43:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:43:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:43:58,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:58,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:43:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:00,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:01,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:03,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:44:03,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:03,998 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:03,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:04,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:04,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:04,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:04,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 23:44:04,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:04,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216486213] [2020-10-27 23:44:04,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:04,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:04,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570302076] [2020-10-27 23:44:04,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:04,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:04,049 INFO L87 Difference]: Start difference. First operand 3190 states and 4716 transitions. Second operand 10 states. [2020-10-27 23:44:04,406 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:44:05,652 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:44:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:06,452 INFO L93 Difference]: Finished difference Result 3878 states and 5759 transitions. [2020-10-27 23:44:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:06,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:44:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:06,457 INFO L225 Difference]: With dead ends: 3878 [2020-10-27 23:44:06,457 INFO L226 Difference]: Without dead ends: 3867 [2020-10-27 23:44:06,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-27 23:44:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2020-10-27 23:44:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3177. [2020-10-27 23:44:06,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3177 states. [2020-10-27 23:44:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4700 transitions. [2020-10-27 23:44:06,941 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4700 transitions. Word has length 55 [2020-10-27 23:44:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:06,941 INFO L481 AbstractCegarLoop]: Abstraction has 3177 states and 4700 transitions. [2020-10-27 23:44:06,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4700 transitions. [2020-10-27 23:44:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:06,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:06,943 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] [2020-10-27 23:44:06,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 23:44:06,943 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1919247311, now seen corresponding path program 1 times [2020-10-27 23:44:06,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:06,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857217126] [2020-10-27 23:44:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:06,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:07,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:08,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:09,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:11,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 23:44:11,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:12,372 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:12,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:12,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:12,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:12,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:12,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:12,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857217126] [2020-10-27 23:44:12,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:12,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 23:44:12,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880153040] [2020-10-27 23:44:12,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 23:44:12,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:12,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 23:44:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 23:44:12,397 INFO L87 Difference]: Start difference. First operand 3177 states and 4700 transitions. Second operand 10 states. [2020-10-27 23:44:12,895 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 23:44:14,168 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-27 23:44:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:14,976 INFO L93 Difference]: Finished difference Result 3877 states and 5757 transitions. [2020-10-27 23:44:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:44:14,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 23:44:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:14,983 INFO L225 Difference]: With dead ends: 3877 [2020-10-27 23:44:14,984 INFO L226 Difference]: Without dead ends: 3863 [2020-10-27 23:44:14,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-27 23:44:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2020-10-27 23:44:15,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 3175. [2020-10-27 23:44:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3175 states. [2020-10-27 23:44:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4697 transitions. [2020-10-27 23:44:15,458 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4697 transitions. Word has length 55 [2020-10-27 23:44:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:15,458 INFO L481 AbstractCegarLoop]: Abstraction has 3175 states and 4697 transitions. [2020-10-27 23:44:15,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 23:44:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4697 transitions. [2020-10-27 23:44:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 23:44:15,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:15,459 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] [2020-10-27 23:44:15,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 23:44:15,459 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2145502541, now seen corresponding path program 1 times [2020-10-27 23:44:15,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:15,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750051518] [2020-10-27 23:44:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:15,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:15,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:15,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:16,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:17,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:18,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:19,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 23:44:20,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:20,927 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:20,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:20,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:20,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:20,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 23:44:20,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:20,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750051518] [2020-10-27 23:44:20,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:20,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 23:44:20,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683658143] [2020-10-27 23:44:20,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 23:44:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 23:44:20,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 23:44:20,958 INFO L87 Difference]: Start difference. First operand 3175 states and 4697 transitions. Second operand 11 states. [2020-10-27 23:44:21,732 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 182 [2020-10-27 23:44:23,260 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:44:23,578 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 23:44:25,130 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 23:44:25,510 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-27 23:44:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:26,432 INFO L93 Difference]: Finished difference Result 9201 states and 13532 transitions. [2020-10-27 23:44:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 23:44:26,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-10-27 23:44:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:26,444 INFO L225 Difference]: With dead ends: 9201 [2020-10-27 23:44:26,444 INFO L226 Difference]: Without dead ends: 9193 [2020-10-27 23:44:26,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2020-10-27 23:44:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2020-10-27 23:44:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 3173. [2020-10-27 23:44:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3173 states. [2020-10-27 23:44:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 4694 transitions. [2020-10-27 23:44:26,979 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 4694 transitions. Word has length 55 [2020-10-27 23:44:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:26,979 INFO L481 AbstractCegarLoop]: Abstraction has 3173 states and 4694 transitions. [2020-10-27 23:44:26,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 23:44:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 4694 transitions. [2020-10-27 23:44:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:26,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:26,980 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] [2020-10-27 23:44:26,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 23:44:26,981 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1705406796, now seen corresponding path program 1 times [2020-10-27 23:44:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:26,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737403256] [2020-10-27 23:44:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:27,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:44:27,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:27,920 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:27,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:27,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:27,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:27,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:27,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:27,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 23:44:27,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:27,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:27,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737403256] [2020-10-27 23:44:27,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:27,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 23:44:27,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798270398] [2020-10-27 23:44:27,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 23:44:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 23:44:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 23:44:27,945 INFO L87 Difference]: Start difference. First operand 3173 states and 4694 transitions. Second operand 9 states. [2020-10-27 23:44:28,238 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 23:44:29,333 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 23:44:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:44:30,381 INFO L93 Difference]: Finished difference Result 5268 states and 7886 transitions. [2020-10-27 23:44:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 23:44:30,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-27 23:44:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:44:30,387 INFO L225 Difference]: With dead ends: 5268 [2020-10-27 23:44:30,387 INFO L226 Difference]: Without dead ends: 5261 [2020-10-27 23:44:30,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 23:44:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2020-10-27 23:44:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 3173. [2020-10-27 23:44:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3173 states. [2020-10-27 23:44:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 4690 transitions. [2020-10-27 23:44:30,896 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 4690 transitions. Word has length 56 [2020-10-27 23:44:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:44:30,896 INFO L481 AbstractCegarLoop]: Abstraction has 3173 states and 4690 transitions. [2020-10-27 23:44:30,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 23:44:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 4690 transitions. [2020-10-27 23:44:30,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 23:44:30,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:44:30,897 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] [2020-10-27 23:44:30,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 23:44:30,897 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:44:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:44:30,898 INFO L82 PathProgramCache]: Analyzing trace with hash -291952864, now seen corresponding path program 1 times [2020-10-27 23:44:30,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:44:30,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166353962] [2020-10-27 23:44:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:44:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:30,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:30,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 23:44:31,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:31,918 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-27 23:44:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:44:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:44:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:44:31,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:44:31,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:44:31,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:44:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:44:31,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:44:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:44:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:44:31,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:44:31,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:44:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:44:31,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166353962] [2020-10-27 23:44:31,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:44:31,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:44:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318284431] [2020-10-27 23:44:31,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:44:31,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:44:31,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:44:31,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:44:31,948 INFO L87 Difference]: Start difference. First operand 3173 states and 4690 transitions. Second operand 8 states. [2020-10-27 23:44:32,308 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 175