/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:24:15,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:24:15,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:24:15,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:24:15,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:24:15,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:24:15,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:24:15,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:24:15,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:24:15,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:24:15,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:24:15,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:24:15,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:24:15,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:24:15,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:24:15,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:24:15,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:24:15,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:24:15,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:24:15,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:24:15,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:24:15,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:24:15,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:24:15,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:24:15,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:24:15,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:24:15,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:24:15,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:24:15,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:24:15,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:24:15,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:24:15,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:24:15,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:24:15,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:24:15,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:24:15,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:24:15,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:24:15,500 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:24:15,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:24:15,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:24:15,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:24:15,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:24:15,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:24:15,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:24:15,530 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:24:15,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:24:15,531 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:24:15,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:24:15,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:24:15,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:24:15,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:24:15,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:24:15,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:24:15,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:24:15,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:24:15,533 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:24:15,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:24:15,533 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:24:15,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:24:15,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:24:15,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:24:15,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:24:15,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:24:15,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:24:15,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:24:15,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:24:15,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:24:15,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:24:15,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:24:15,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:24:15,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:24:15,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:24:15,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:24:15,959 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:24:15,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:24:15,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:24:15,967 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:24:15,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:24:16,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c777606ed/f124d6caf2e64b65842ef0d31b206d75/FLAG79251067b [2020-10-28 18:24:17,000 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:24:17,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:24:17,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c777606ed/f124d6caf2e64b65842ef0d31b206d75/FLAG79251067b [2020-10-28 18:24:17,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c777606ed/f124d6caf2e64b65842ef0d31b206d75 [2020-10-28 18:24:17,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:24:17,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:24:17,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:24:17,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:24:17,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:24:17,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:24:17" (1/1) ... [2020-10-28 18:24:17,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6282e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:17, skipping insertion in model container [2020-10-28 18:24:17,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:24:17" (1/1) ... [2020-10-28 18:24:17,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:24:17,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:24:18,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:24:18,543 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:24:19,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:24:19,349 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:24:19,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19 WrapperNode [2020-10-28 18:24:19,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:24:19,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:24:19,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:24:19,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:24:19,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... [2020-10-28 18:24:19,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:24:19,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:24:19,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:24:19,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:24:19,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:24:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:24:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:24:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:24:19,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:24:19,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:24:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:24:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:24:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:24:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:24:19,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:24:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:24:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:24:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:24:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:24:19,720 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:24:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:24:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:24:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:24:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:24:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:24:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:24:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:24:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:24:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:24:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:24:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:24:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:24:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:24:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:24:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:24:23,553 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:24:23,554 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:24:23,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:24:23 BoogieIcfgContainer [2020-10-28 18:24:23,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:24:23,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:24:23,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:24:23,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:24:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:24:17" (1/3) ... [2020-10-28 18:24:23,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6387c8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:24:23, skipping insertion in model container [2020-10-28 18:24:23,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:24:19" (2/3) ... [2020-10-28 18:24:23,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6387c8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:24:23, skipping insertion in model container [2020-10-28 18:24:23,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:24:23" (3/3) ... [2020-10-28 18:24:23,586 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:24:23,605 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:24:23,611 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:24:23,623 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:24:23,661 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:24:23,661 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:24:23,662 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:24:23,662 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:24:23,662 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:24:23,662 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:24:23,662 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:24:23,662 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:24:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states. [2020-10-28 18:24:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-28 18:24:23,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:23,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:24:23,750 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1030577711, now seen corresponding path program 1 times [2020-10-28 18:24:23,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:23,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657628445] [2020-10-28 18:24:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:25,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:26,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:28,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:28,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:29,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:29,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:29,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-28 18:24:29,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:24:29,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-28 18:24:29,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:29,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:24:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:24:29,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 281 [2020-10-28 18:24:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:24:31,246 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:24:31,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:31,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:31,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:31,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:31,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 18:24:31,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:31,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:31,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:31,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:31,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:31,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:24:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:24:32,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657628445] [2020-10-28 18:24:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:32,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:24:32,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374024632] [2020-10-28 18:24:32,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:24:32,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:32,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:24:32,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:32,102 INFO L87 Difference]: Start difference. First operand 1344 states. Second operand 5 states. [2020-10-28 18:24:47,426 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:24:50,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:24:50,229 INFO L93 Difference]: Finished difference Result 3973 states and 7159 transitions. [2020-10-28 18:24:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:24:50,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-10-28 18:24:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:24:50,267 INFO L225 Difference]: With dead ends: 3973 [2020-10-28 18:24:50,267 INFO L226 Difference]: Without dead ends: 2638 [2020-10-28 18:24:50,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:24:50,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2020-10-28 18:24:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2635. [2020-10-28 18:24:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2635 states. [2020-10-28 18:24:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4316 transitions. [2020-10-28 18:24:50,514 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4316 transitions. Word has length 477 [2020-10-28 18:24:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:24:50,516 INFO L481 AbstractCegarLoop]: Abstraction has 2635 states and 4316 transitions. [2020-10-28 18:24:50,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:24:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4316 transitions. [2020-10-28 18:24:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-28 18:24:50,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:24:50,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:24:50,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:24:50,535 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:24:50,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:24:50,536 INFO L82 PathProgramCache]: Analyzing trace with hash 668231224, now seen corresponding path program 1 times [2020-10-28 18:24:50,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:24:50,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918286395] [2020-10-28 18:24:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:24:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:50,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:51,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:52,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:53,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:54,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:54,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:55,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:55,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:55,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 487 [2020-10-28 18:24:55,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:24:55,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5219 [2020-10-28 18:24:55,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:55,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:55,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:24:55,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:24:55,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 263 [2020-10-28 18:24:55,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:24:57,126 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:24:57,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:24:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:24:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:24:57,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:24:57,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:24:57,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:24:57,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 18:24:57,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:24:57,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:24:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:24:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:24:57,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:24:57,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:24:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:24:57,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918286395] [2020-10-28 18:24:57,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:24:57,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:24:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242411997] [2020-10-28 18:24:57,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:24:57,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:24:57,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:24:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:24:57,703 INFO L87 Difference]: Start difference. First operand 2635 states and 4316 transitions. Second operand 5 states. [2020-10-28 18:25:11,079 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:25:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:25:13,993 INFO L93 Difference]: Finished difference Result 7806 states and 12784 transitions. [2020-10-28 18:25:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:25:13,998 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-10-28 18:25:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:25:14,028 INFO L225 Difference]: With dead ends: 7806 [2020-10-28 18:25:14,028 INFO L226 Difference]: Without dead ends: 5199 [2020-10-28 18:25:14,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:25:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2020-10-28 18:25:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 5196. [2020-10-28 18:25:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5196 states. [2020-10-28 18:25:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 8473 transitions. [2020-10-28 18:25:14,334 INFO L78 Accepts]: Start accepts. Automaton has 5196 states and 8473 transitions. Word has length 479 [2020-10-28 18:25:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:25:14,337 INFO L481 AbstractCegarLoop]: Abstraction has 5196 states and 8473 transitions. [2020-10-28 18:25:14,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:25:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 5196 states and 8473 transitions. [2020-10-28 18:25:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-10-28 18:25:14,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:25:14,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:25:14,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:25:14,362 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:25:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:25:14,363 INFO L82 PathProgramCache]: Analyzing trace with hash 396897962, now seen corresponding path program 1 times [2020-10-28 18:25:14,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:25:14,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887593593] [2020-10-28 18:25:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:25:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:14,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:14,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:14,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:15,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:15,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:16,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:16,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:17,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:17,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:19,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:19,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 490 [2020-10-28 18:25:19,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:25:19,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5107 [2020-10-28 18:25:19,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:19,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:19,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:25:19,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:25:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 298 [2020-10-28 18:25:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:20,774 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:25:20,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:25:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:20,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:20,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:20,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:25:20,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:25:20,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:25:20,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:20,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:25:20,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:25:20,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:25:20,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:25:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:25:21,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887593593] [2020-10-28 18:25:21,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:25:21,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:25:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831708480] [2020-10-28 18:25:21,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:25:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:25:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:25:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:25:21,418 INFO L87 Difference]: Start difference. First operand 5196 states and 8473 transitions. Second operand 4 states. [2020-10-28 18:25:38,178 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification that was a NOOP. DAG size: 417 [2020-10-28 18:25:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:25:41,004 INFO L93 Difference]: Finished difference Result 15085 states and 24531 transitions. [2020-10-28 18:25:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:25:41,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-10-28 18:25:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:25:41,062 INFO L225 Difference]: With dead ends: 15085 [2020-10-28 18:25:41,063 INFO L226 Difference]: Without dead ends: 10286 [2020-10-28 18:25:41,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:25:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2020-10-28 18:25:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 10283. [2020-10-28 18:25:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10283 states. [2020-10-28 18:25:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10283 states to 10283 states and 16711 transitions. [2020-10-28 18:25:41,522 INFO L78 Accepts]: Start accepts. Automaton has 10283 states and 16711 transitions. Word has length 482 [2020-10-28 18:25:41,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:25:41,523 INFO L481 AbstractCegarLoop]: Abstraction has 10283 states and 16711 transitions. [2020-10-28 18:25:41,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:25:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 10283 states and 16711 transitions. [2020-10-28 18:25:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-10-28 18:25:41,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:25:41,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:25:41,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:25:41,609 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:25:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:25:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash -62308119, now seen corresponding path program 1 times [2020-10-28 18:25:41,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:25:41,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711753662] [2020-10-28 18:25:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:25:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:41,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:41,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:42,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:42,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:42,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:42,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:43,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:43,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:43,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:46,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:46,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 491 [2020-10-28 18:25:46,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:25:46,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 18:25:46,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:46,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:25:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:25:46,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 209 [2020-10-28 18:25:46,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:47,844 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:25:47,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:25:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:25:47,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:25:47,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:25:47,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:25:47,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:25:47,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:25:47,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:25:47,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:25:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:25:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:25:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:25:47,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:25:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:25:48,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711753662] [2020-10-28 18:25:48,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:25:48,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:25:48,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635708840] [2020-10-28 18:25:48,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:25:48,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:25:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:25:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:25:48,268 INFO L87 Difference]: Start difference. First operand 10283 states and 16711 transitions. Second operand 4 states. [2020-10-28 18:26:05,226 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification that was a NOOP. DAG size: 417 [2020-10-28 18:26:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:08,130 INFO L93 Difference]: Finished difference Result 29764 states and 48205 transitions. [2020-10-28 18:26:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:26:08,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-10-28 18:26:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:08,209 INFO L225 Difference]: With dead ends: 29764 [2020-10-28 18:26:08,209 INFO L226 Difference]: Without dead ends: 20129 [2020-10-28 18:26:08,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:08,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20129 states. [2020-10-28 18:26:09,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20129 to 20126. [2020-10-28 18:26:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20126 states. [2020-10-28 18:26:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20126 states to 20126 states and 32541 transitions. [2020-10-28 18:26:09,051 INFO L78 Accepts]: Start accepts. Automaton has 20126 states and 32541 transitions. Word has length 483 [2020-10-28 18:26:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:09,052 INFO L481 AbstractCegarLoop]: Abstraction has 20126 states and 32541 transitions. [2020-10-28 18:26:09,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:26:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20126 states and 32541 transitions. [2020-10-28 18:26:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-10-28 18:26:09,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:09,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:26:09,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:26:09,091 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1533899502, now seen corresponding path program 1 times [2020-10-28 18:26:09,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:09,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638208293] [2020-10-28 18:26:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:09,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:09,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:09,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:11,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:12,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:12,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:12,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:13,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:13,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:14,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:14,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:14,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 491 [2020-10-28 18:26:14,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 18:26:14,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:15,356 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:26:15,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:15,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:15,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:15,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:15,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638208293] [2020-10-28 18:26:15,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:15,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:26:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818677346] [2020-10-28 18:26:15,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:26:15,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:26:15,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:15,842 INFO L87 Difference]: Start difference. First operand 20126 states and 32541 transitions. Second operand 5 states. [2020-10-28 18:26:29,772 WARN L193 SmtUtils]: Spent 885.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:26:32,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:32,843 INFO L93 Difference]: Finished difference Result 59439 states and 95988 transitions. [2020-10-28 18:26:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:26:32,844 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 483 [2020-10-28 18:26:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:32,911 INFO L225 Difference]: With dead ends: 59439 [2020-10-28 18:26:32,911 INFO L226 Difference]: Without dead ends: 39684 [2020-10-28 18:26:32,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:26:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39684 states. [2020-10-28 18:26:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39684 to 39681. [2020-10-28 18:26:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39681 states. [2020-10-28 18:26:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39681 states to 39681 states and 63788 transitions. [2020-10-28 18:26:34,567 INFO L78 Accepts]: Start accepts. Automaton has 39681 states and 63788 transitions. Word has length 483 [2020-10-28 18:26:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:26:34,567 INFO L481 AbstractCegarLoop]: Abstraction has 39681 states and 63788 transitions. [2020-10-28 18:26:34,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:26:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 39681 states and 63788 transitions. [2020-10-28 18:26:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-28 18:26:34,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:26:34,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:26:34,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:26:34,627 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:26:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:26:34,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1412653733, now seen corresponding path program 1 times [2020-10-28 18:26:34,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:26:34,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018987954] [2020-10-28 18:26:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:26:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:34,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:34,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:35,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:35,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:36,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:36,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:37,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:37,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:38,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:39,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:39,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:39,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:39,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 493 [2020-10-28 18:26:39,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 18:26:39,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:26:39,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:39,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:26:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:26:39,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-28 18:26:39,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:40,747 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:26:40,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:26:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:26:40,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:26:40,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:26:40,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:26:40,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:26:40,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:26:40,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:26:40,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:26:40,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:26:40,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:26:40,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:26:40,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:26:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:26:41,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018987954] [2020-10-28 18:26:41,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:26:41,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:26:41,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563661723] [2020-10-28 18:26:41,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:26:41,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:26:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:26:41,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:26:41,109 INFO L87 Difference]: Start difference. First operand 39681 states and 63788 transitions. Second operand 5 states. [2020-10-28 18:26:56,294 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:26:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:26:59,606 INFO L93 Difference]: Finished difference Result 114189 states and 182737 transitions. [2020-10-28 18:26:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:26:59,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-10-28 18:26:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:26:59,731 INFO L225 Difference]: With dead ends: 114189 [2020-10-28 18:26:59,732 INFO L226 Difference]: Without dead ends: 76966 [2020-10-28 18:26:59,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:26:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76966 states. [2020-10-28 18:27:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76966 to 76963. [2020-10-28 18:27:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76963 states. [2020-10-28 18:27:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76963 states to 76963 states and 122767 transitions. [2020-10-28 18:27:03,129 INFO L78 Accepts]: Start accepts. Automaton has 76963 states and 122767 transitions. Word has length 485 [2020-10-28 18:27:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:03,129 INFO L481 AbstractCegarLoop]: Abstraction has 76963 states and 122767 transitions. [2020-10-28 18:27:03,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:27:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 76963 states and 122767 transitions. [2020-10-28 18:27:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-28 18:27:03,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:03,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:03,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:27:03,228 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash -359473841, now seen corresponding path program 1 times [2020-10-28 18:27:03,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:03,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945806609] [2020-10-28 18:27:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:03,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:04,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:04,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:04,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:08,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:08,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 496 [2020-10-28 18:27:08,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:27:08,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 18:27:08,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:08,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:27:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:08,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-28 18:27:08,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:09,438 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:27:09,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:09,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:09,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:09,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:09,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945806609] [2020-10-28 18:27:09,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:09,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:09,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171158731] [2020-10-28 18:27:09,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:27:09,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:09,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:27:09,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:09,766 INFO L87 Difference]: Start difference. First operand 76963 states and 122767 transitions. Second operand 5 states. [2020-10-28 18:27:26,782 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 418 [2020-10-28 18:27:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:27:30,752 INFO L93 Difference]: Finished difference Result 228067 states and 363498 transitions. [2020-10-28 18:27:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:27:30,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2020-10-28 18:27:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:27:31,235 INFO L225 Difference]: With dead ends: 228067 [2020-10-28 18:27:31,235 INFO L226 Difference]: Without dead ends: 151872 [2020-10-28 18:27:31,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:27:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151872 states. [2020-10-28 18:27:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151872 to 151869. [2020-10-28 18:27:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151869 states. [2020-10-28 18:27:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151869 states to 151869 states and 240983 transitions. [2020-10-28 18:27:38,073 INFO L78 Accepts]: Start accepts. Automaton has 151869 states and 240983 transitions. Word has length 488 [2020-10-28 18:27:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:27:38,073 INFO L481 AbstractCegarLoop]: Abstraction has 151869 states and 240983 transitions. [2020-10-28 18:27:38,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:27:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 151869 states and 240983 transitions. [2020-10-28 18:27:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-28 18:27:38,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:27:38,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:27:38,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:27:38,500 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:27:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:27:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1336167096, now seen corresponding path program 1 times [2020-10-28 18:27:38,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:27:38,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774191980] [2020-10-28 18:27:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:27:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:41,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:43,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:43,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 499 [2020-10-28 18:27:43,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:27:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 18:27:43,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:43,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:27:43,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:27:43,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 18:27:43,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:27:44,699 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-10-28 18:27:44,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:27:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:27:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:27:44,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:27:44,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:27:44,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:27:44,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 18:27:44,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:27:44,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:27:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:27:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:27:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:27:44,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:27:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:27:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774191980] [2020-10-28 18:27:45,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:27:45,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:27:45,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169987412] [2020-10-28 18:27:45,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:27:45,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:27:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:27:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:27:45,134 INFO L87 Difference]: Start difference. First operand 151869 states and 240983 transitions. Second operand 5 states.