/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:02:31,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:02:31,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:02:31,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:02:31,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:02:31,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:02:31,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:02:31,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:02:31,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:02:31,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:02:31,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:02:31,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:02:31,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:02:31,409 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:02:31,410 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:02:31,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:02:31,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:02:31,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:02:31,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:02:31,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:02:31,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:02:31,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:02:31,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:02:31,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:02:31,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:02:31,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:02:31,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:02:31,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:02:31,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:02:31,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:02:31,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:02:31,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:02:31,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:02:31,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:02:31,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:02:31,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:02:31,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:02:31,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:02:31,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:02:31,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:02:31,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:02:31,462 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 19:02:31,524 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:02:31,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:02:31,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:02:31,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:02:31,527 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:02:31,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:02:31,528 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:02:31,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:02:31,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:02:31,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:02:31,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:02:31,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:02:31,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:02:31,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:02:31,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:02:31,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:02:31,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:02:31,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:02:31,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:02:31,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:02:31,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:02:31,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:02:31,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:02:31,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:02:31,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:02:31,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:02:31,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:02:31,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:02:31,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:02:31,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:02:32,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:02:32,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:02:32,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:02:32,057 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:02:32,058 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:02:32,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:02:32,152 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71a0b6a41/e1533e02d91f4ed9af02d7009118681b/FLAGc9dabebb1 [2020-10-28 19:02:32,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:02:32,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:02:32,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71a0b6a41/e1533e02d91f4ed9af02d7009118681b/FLAGc9dabebb1 [2020-10-28 19:02:33,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/71a0b6a41/e1533e02d91f4ed9af02d7009118681b [2020-10-28 19:02:33,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:02:33,104 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:02:33,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:02:33,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:02:33,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:02:33,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2740a87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33, skipping insertion in model container [2020-10-28 19:02:33,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:02:33,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:02:33,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:02:33,583 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:02:33,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:02:33,728 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:02:33,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33 WrapperNode [2020-10-28 19:02:33,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:02:33,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:02:33,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:02:33,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:02:33,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (1/1) ... [2020-10-28 19:02:33,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:02:33,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:02:33,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:02:33,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:02:33,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (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 19:02:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:02:33,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:02:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:02:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:02:33,907 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:02:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:02:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:02:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:02:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:02:33,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:02:33,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:02:33,911 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:02:33,912 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:02:33,912 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:02:33,912 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:02:33,913 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:02:33,913 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:02:33,913 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:02:33,914 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:02:33,914 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:02:33,914 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:02:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:02:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:02:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:02:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:02:33,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:02:33,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:02:33,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:02:33,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:02:35,052 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:02:35,053 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:02:35,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:02:35 BoogieIcfgContainer [2020-10-28 19:02:35,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:02:35,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:02:35,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:02:35,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:02:35,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:02:33" (1/3) ... [2020-10-28 19:02:35,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ac386b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:02:35, skipping insertion in model container [2020-10-28 19:02:35,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:02:33" (2/3) ... [2020-10-28 19:02:35,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ac386b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:02:35, skipping insertion in model container [2020-10-28 19:02:35,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:02:35" (3/3) ... [2020-10-28 19:02:35,064 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 19:02:35,075 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:02:35,081 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:02:35,095 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:02:35,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:02:35,146 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:02:35,146 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:02:35,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:02:35,147 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:02:35,147 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:02:35,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:02:35,147 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:02:35,170 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states. [2020-10-28 19:02:35,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 19:02:35,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:35,182 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] [2020-10-28 19:02:35,183 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -768834611, now seen corresponding path program 1 times [2020-10-28 19:02:35,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:35,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10178262] [2020-10-28 19:02:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:40,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:40,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 19:02:40,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:02:40,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4706 [2020-10-28 19:02:40,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:40,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:40,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:02:40,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 19:02:40,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 19:02:40,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:02:40,711 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:02:40,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:40,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:40,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:40,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:40,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:40,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:02:40,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:40,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:40,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:40,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:02:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:40,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10178262] [2020-10-28 19:02:40,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:40,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:02:40,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290076046] [2020-10-28 19:02:40,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:02:40,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:02:40,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:02:40,826 INFO L87 Difference]: Start difference. First operand 225 states. Second operand 4 states. [2020-10-28 19:02:41,185 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:02:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:42,319 INFO L93 Difference]: Finished difference Result 450 states and 735 transitions. [2020-10-28 19:02:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:02:42,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-10-28 19:02:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:42,339 INFO L225 Difference]: With dead ends: 450 [2020-10-28 19:02:42,340 INFO L226 Difference]: Without dead ends: 335 [2020-10-28 19:02:42,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:02:42,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-28 19:02:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 332. [2020-10-28 19:02:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-28 19:02:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 494 transitions. [2020-10-28 19:02:42,433 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 494 transitions. Word has length 86 [2020-10-28 19:02:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:42,435 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 494 transitions. [2020-10-28 19:02:42,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:02:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 494 transitions. [2020-10-28 19:02:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 19:02:42,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:42,450 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] [2020-10-28 19:02:42,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:02:42,451 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1934687898, now seen corresponding path program 1 times [2020-10-28 19:02:42,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:42,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619153892] [2020-10-28 19:02:42,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:42,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:42,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:43,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:43,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 19:02:43,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:02:43,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1196 [2020-10-28 19:02:43,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:43,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:02:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 19:02:43,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:02:43,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 19:02:44,109 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:02:44,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:44,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:44,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:44,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:02:44,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:44,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:44,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:44,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:02:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:44,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619153892] [2020-10-28 19:02:44,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:44,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:02:44,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490859282] [2020-10-28 19:02:44,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:02:44,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:44,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:02:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:02:44,166 INFO L87 Difference]: Start difference. First operand 332 states and 494 transitions. Second operand 5 states. [2020-10-28 19:02:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:45,369 INFO L93 Difference]: Finished difference Result 511 states and 775 transitions. [2020-10-28 19:02:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:02:45,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-28 19:02:45,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:45,374 INFO L225 Difference]: With dead ends: 511 [2020-10-28 19:02:45,375 INFO L226 Difference]: Without dead ends: 508 [2020-10-28 19:02:45,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:02:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-10-28 19:02:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 334. [2020-10-28 19:02:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-28 19:02:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 496 transitions. [2020-10-28 19:02:45,423 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 496 transitions. Word has length 87 [2020-10-28 19:02:45,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:45,424 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 496 transitions. [2020-10-28 19:02:45,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:02:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 496 transitions. [2020-10-28 19:02:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 19:02:45,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:45,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:02:45,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:02:45,433 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:45,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:45,434 INFO L82 PathProgramCache]: Analyzing trace with hash -171691642, now seen corresponding path program 1 times [2020-10-28 19:02:45,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:45,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424911155] [2020-10-28 19:02:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:45,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:47,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:47,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 19:02:47,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:02:47,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1831 [2020-10-28 19:02:47,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:47,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:02:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:02:47,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 19:02:47,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:02:47,716 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:02:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:47,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:47,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:47,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:47,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:47,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:02:47,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:47,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:47,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:47,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:47,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:47,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:02:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:47,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424911155] [2020-10-28 19:02:47,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:47,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:02:47,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257794116] [2020-10-28 19:02:47,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:02:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:02:47,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:02:47,802 INFO L87 Difference]: Start difference. First operand 334 states and 496 transitions. Second operand 5 states. [2020-10-28 19:02:48,084 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 19:02:48,896 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:02:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:49,474 INFO L93 Difference]: Finished difference Result 715 states and 1095 transitions. [2020-10-28 19:02:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:02:49,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-10-28 19:02:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:49,478 INFO L225 Difference]: With dead ends: 715 [2020-10-28 19:02:49,479 INFO L226 Difference]: Without dead ends: 518 [2020-10-28 19:02:49,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:02:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-10-28 19:02:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 515. [2020-10-28 19:02:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-28 19:02:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 781 transitions. [2020-10-28 19:02:49,513 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 781 transitions. Word has length 88 [2020-10-28 19:02:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:49,513 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 781 transitions. [2020-10-28 19:02:49,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:02:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 781 transitions. [2020-10-28 19:02:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 19:02:49,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:49,515 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] [2020-10-28 19:02:49,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:02:49,516 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:49,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:49,516 INFO L82 PathProgramCache]: Analyzing trace with hash -937798823, now seen corresponding path program 1 times [2020-10-28 19:02:49,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:49,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400986921] [2020-10-28 19:02:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:49,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:49,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:50,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:51,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:54,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:54,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 19:02:54,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:02:54,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:02:54,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:54,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:54,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:02:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 19:02:54,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 19:02:54,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 19:02:54,845 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:02:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:02:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:54,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:54,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:02:54,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:02:54,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:02:54,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:02:54,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:02:54,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:02:54,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:02:54,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:02:54,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:02:54,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:02:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:02:54,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400986921] [2020-10-28 19:02:54,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:02:54,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:02:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516691632] [2020-10-28 19:02:54,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:02:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:02:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:02:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:02:54,895 INFO L87 Difference]: Start difference. First operand 515 states and 781 transitions. Second operand 4 states. [2020-10-28 19:02:55,169 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:02:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:02:56,139 INFO L93 Difference]: Finished difference Result 1309 states and 2027 transitions. [2020-10-28 19:02:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:02:56,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 19:02:56,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:02:56,151 INFO L225 Difference]: With dead ends: 1309 [2020-10-28 19:02:56,151 INFO L226 Difference]: Without dead ends: 913 [2020-10-28 19:02:56,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:02:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-10-28 19:02:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 910. [2020-10-28 19:02:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2020-10-28 19:02:56,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1389 transitions. [2020-10-28 19:02:56,238 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1389 transitions. Word has length 89 [2020-10-28 19:02:56,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:02:56,239 INFO L481 AbstractCegarLoop]: Abstraction has 910 states and 1389 transitions. [2020-10-28 19:02:56,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:02:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1389 transitions. [2020-10-28 19:02:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 19:02:56,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:02:56,242 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] [2020-10-28 19:02:56,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:02:56,243 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:02:56,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:02:56,243 INFO L82 PathProgramCache]: Analyzing trace with hash -913153125, now seen corresponding path program 1 times [2020-10-28 19:02:56,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:02:56,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335390050] [2020-10-28 19:02:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:02:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:02:56,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:56,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:56,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:56,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:02:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:01,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 19:03:01,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:01,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:03:01,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:01,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 19:03:01,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:03:01,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:01,610 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:01,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:01,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:01,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:01,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:01,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:01,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:03:01,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:01,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:01,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:01,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:01,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335390050] [2020-10-28 19:03:01,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:01,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:01,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631357494] [2020-10-28 19:03:01,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:01,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:01,691 INFO L87 Difference]: Start difference. First operand 910 states and 1389 transitions. Second operand 4 states. [2020-10-28 19:03:01,966 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:03:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:02,994 INFO L93 Difference]: Finished difference Result 2356 states and 3639 transitions. [2020-10-28 19:03:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:02,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 19:03:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:03,004 INFO L225 Difference]: With dead ends: 2356 [2020-10-28 19:03:03,005 INFO L226 Difference]: Without dead ends: 1635 [2020-10-28 19:03:03,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2020-10-28 19:03:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1632. [2020-10-28 19:03:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1632 states. [2020-10-28 19:03:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2487 transitions. [2020-10-28 19:03:03,120 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2487 transitions. Word has length 89 [2020-10-28 19:03:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:03,121 INFO L481 AbstractCegarLoop]: Abstraction has 1632 states and 2487 transitions. [2020-10-28 19:03:03,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2487 transitions. [2020-10-28 19:03:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 19:03:03,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:03,124 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] [2020-10-28 19:03:03,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:03:03,124 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1866448482, now seen corresponding path program 1 times [2020-10-28 19:03:03,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:03,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128083551] [2020-10-28 19:03:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:03,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:03,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:03,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:04,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:08,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:08,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 19:03:08,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:03:08,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:08,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 19:03:08,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 19:03:08,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:08,421 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:08,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:08,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:08,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:08,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:08,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 19:03:08,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:08,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:08,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:08,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:08,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:08,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:08,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128083551] [2020-10-28 19:03:08,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:08,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:08,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144977358] [2020-10-28 19:03:08,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:08,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:08,473 INFO L87 Difference]: Start difference. First operand 1632 states and 2487 transitions. Second operand 4 states. [2020-10-28 19:03:08,722 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:03:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:09,708 INFO L93 Difference]: Finished difference Result 4286 states and 6579 transitions. [2020-10-28 19:03:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:09,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 19:03:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:09,725 INFO L225 Difference]: With dead ends: 4286 [2020-10-28 19:03:09,726 INFO L226 Difference]: Without dead ends: 2959 [2020-10-28 19:03:09,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2020-10-28 19:03:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2956. [2020-10-28 19:03:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2956 states. [2020-10-28 19:03:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 4487 transitions. [2020-10-28 19:03:09,910 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 4487 transitions. Word has length 89 [2020-10-28 19:03:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:09,910 INFO L481 AbstractCegarLoop]: Abstraction has 2956 states and 4487 transitions. [2020-10-28 19:03:09,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 4487 transitions. [2020-10-28 19:03:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 19:03:09,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:09,913 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] [2020-10-28 19:03:09,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:03:09,914 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:09,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:09,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2129907675, now seen corresponding path program 1 times [2020-10-28 19:03:09,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:09,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200136613] [2020-10-28 19:03:09,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:09,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:11,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:14,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:14,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 19:03:14,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:03:14,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:15,214 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:15,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:15,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:15,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:15,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:03:15,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:15,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:15,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:15,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:15,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:15,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:15,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200136613] [2020-10-28 19:03:15,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:15,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:15,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159505224] [2020-10-28 19:03:15,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:15,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:15,267 INFO L87 Difference]: Start difference. First operand 2956 states and 4487 transitions. Second operand 4 states. [2020-10-28 19:03:15,517 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:03:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:16,731 INFO L93 Difference]: Finished difference Result 8152 states and 12381 transitions. [2020-10-28 19:03:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:16,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 19:03:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:16,760 INFO L225 Difference]: With dead ends: 8152 [2020-10-28 19:03:16,760 INFO L226 Difference]: Without dead ends: 5469 [2020-10-28 19:03:16,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2020-10-28 19:03:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 5466. [2020-10-28 19:03:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5466 states. [2020-10-28 19:03:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 8185 transitions. [2020-10-28 19:03:17,099 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 8185 transitions. Word has length 89 [2020-10-28 19:03:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:17,099 INFO L481 AbstractCegarLoop]: Abstraction has 5466 states and 8185 transitions. [2020-10-28 19:03:17,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:17,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 8185 transitions. [2020-10-28 19:03:17,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 19:03:17,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:17,104 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] [2020-10-28 19:03:17,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:03:17,105 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1539006233, now seen corresponding path program 1 times [2020-10-28 19:03:17,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:17,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307392051] [2020-10-28 19:03:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:17,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:17,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:17,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:17,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:18,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:22,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4963 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 19:03:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:03:22,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:22,358 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:22,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:22,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:22,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:22,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:22,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:22,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:03:22,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:22,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:22,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:22,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:22,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:22,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307392051] [2020-10-28 19:03:22,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:22,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:03:22,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936389789] [2020-10-28 19:03:22,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:03:22,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:22,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:03:22,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:03:22,406 INFO L87 Difference]: Start difference. First operand 5466 states and 8185 transitions. Second operand 4 states. [2020-10-28 19:03:22,680 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:03:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:24,131 INFO L93 Difference]: Finished difference Result 15208 states and 22779 transitions. [2020-10-28 19:03:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:03:24,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-28 19:03:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:24,183 INFO L225 Difference]: With dead ends: 15208 [2020-10-28 19:03:24,183 INFO L226 Difference]: Without dead ends: 10069 [2020-10-28 19:03:24,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:03:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10069 states. [2020-10-28 19:03:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10069 to 10066. [2020-10-28 19:03:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10066 states. [2020-10-28 19:03:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 14903 transitions. [2020-10-28 19:03:24,855 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 14903 transitions. Word has length 89 [2020-10-28 19:03:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:24,856 INFO L481 AbstractCegarLoop]: Abstraction has 10066 states and 14903 transitions. [2020-10-28 19:03:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:03:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 14903 transitions. [2020-10-28 19:03:24,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 19:03:24,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:24,865 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] [2020-10-28 19:03:24,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:03:24,866 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash 889031380, now seen corresponding path program 1 times [2020-10-28 19:03:24,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:24,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336030273] [2020-10-28 19:03:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:24,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:24,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:25,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:25,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:29,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:29,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 19:03:29,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:29,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4514 [2020-10-28 19:03:29,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:29,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:03:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 19:03:29,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 19:03:29,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:29,721 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:29,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:29,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:29,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:29,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:29,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 19:03:29,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:29,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:03:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:29,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:03:29,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:29,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336030273] [2020-10-28 19:03:29,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:29,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:03:29,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403313034] [2020-10-28 19:03:29,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:03:29,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:29,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:03:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:03:29,776 INFO L87 Difference]: Start difference. First operand 10066 states and 14903 transitions. Second operand 8 states. [2020-10-28 19:03:30,137 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 19:03:31,218 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:03:31,483 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 19:03:31,731 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:03:33,399 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:03:33,670 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:03:33,938 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 19:03:34,199 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:03:34,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:34,492 INFO L93 Difference]: Finished difference Result 49891 states and 74333 transitions. [2020-10-28 19:03:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 19:03:34,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-10-28 19:03:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:34,726 INFO L225 Difference]: With dead ends: 49891 [2020-10-28 19:03:34,727 INFO L226 Difference]: Without dead ends: 41344 [2020-10-28 19:03:34,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 19:03:34,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41344 states. [2020-10-28 19:03:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41344 to 12100. [2020-10-28 19:03:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12100 states. [2020-10-28 19:03:35,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12100 states to 12100 states and 17939 transitions. [2020-10-28 19:03:35,982 INFO L78 Accepts]: Start accepts. Automaton has 12100 states and 17939 transitions. Word has length 90 [2020-10-28 19:03:35,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:35,982 INFO L481 AbstractCegarLoop]: Abstraction has 12100 states and 17939 transitions. [2020-10-28 19:03:35,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:03:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 12100 states and 17939 transitions. [2020-10-28 19:03:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 19:03:35,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:35,990 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] [2020-10-28 19:03:35,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:03:35,991 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:35,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1169830845, now seen corresponding path program 1 times [2020-10-28 19:03:35,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:35,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266411634] [2020-10-28 19:03:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:36,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:36,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:36,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:36,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:38,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:38,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 19:03:38,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:38,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2600 [2020-10-28 19:03:38,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:38,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:03:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:03:38,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 19:03:38,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:39,190 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:39,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:39,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:39,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:39,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:39,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:39,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:03:39,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:39,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:03:39,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:39,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266411634] [2020-10-28 19:03:39,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:39,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:03:39,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525702249] [2020-10-28 19:03:39,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:03:39,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:39,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:03:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:03:39,264 INFO L87 Difference]: Start difference. First operand 12100 states and 17939 transitions. Second operand 8 states. [2020-10-28 19:03:39,573 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 19:03:40,892 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:03:43,048 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:03:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:44,844 INFO L93 Difference]: Finished difference Result 61228 states and 90445 transitions. [2020-10-28 19:03:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:03:44,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-10-28 19:03:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:44,988 INFO L225 Difference]: With dead ends: 61228 [2020-10-28 19:03:44,988 INFO L226 Difference]: Without dead ends: 56977 [2020-10-28 19:03:45,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:03:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56977 states. [2020-10-28 19:03:46,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56977 to 12396. [2020-10-28 19:03:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12396 states. [2020-10-28 19:03:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12396 states to 12396 states and 18347 transitions. [2020-10-28 19:03:46,339 INFO L78 Accepts]: Start accepts. Automaton has 12396 states and 18347 transitions. Word has length 90 [2020-10-28 19:03:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:46,339 INFO L481 AbstractCegarLoop]: Abstraction has 12396 states and 18347 transitions. [2020-10-28 19:03:46,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:03:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 12396 states and 18347 transitions. [2020-10-28 19:03:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 19:03:46,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:46,347 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] [2020-10-28 19:03:46,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:03:46,348 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:46,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:46,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2100880217, now seen corresponding path program 1 times [2020-10-28 19:03:46,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:46,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829057516] [2020-10-28 19:03:46,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:46,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:46,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:46,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:46,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:47,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:49,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 19:03:49,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:03:49,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2744 [2020-10-28 19:03:49,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:49,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:03:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:03:49,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 19:03:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:03:49,504 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:03:49,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:03:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:49,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:03:49,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:03:49,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:03:49,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:03:49,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:03:49,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:03:49,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:03:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:03:49,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:03:49,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:03:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:03:49,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829057516] [2020-10-28 19:03:49,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:03:49,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:03:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271140798] [2020-10-28 19:03:49,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:03:49,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:03:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:03:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:03:49,579 INFO L87 Difference]: Start difference. First operand 12396 states and 18347 transitions. Second operand 8 states. [2020-10-28 19:03:49,841 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:03:50,098 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-10-28 19:03:51,176 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 19:03:53,555 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:03:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:03:55,560 INFO L93 Difference]: Finished difference Result 57128 states and 83981 transitions. [2020-10-28 19:03:55,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:03:55,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-10-28 19:03:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:03:55,669 INFO L225 Difference]: With dead ends: 57128 [2020-10-28 19:03:55,670 INFO L226 Difference]: Without dead ends: 46405 [2020-10-28 19:03:55,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:03:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46405 states. [2020-10-28 19:03:57,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46405 to 25120. [2020-10-28 19:03:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25120 states. [2020-10-28 19:03:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 36567 transitions. [2020-10-28 19:03:57,986 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 36567 transitions. Word has length 90 [2020-10-28 19:03:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:03:57,986 INFO L481 AbstractCegarLoop]: Abstraction has 25120 states and 36567 transitions. [2020-10-28 19:03:57,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:03:57,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 36567 transitions. [2020-10-28 19:03:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 19:03:57,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:03:57,995 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] [2020-10-28 19:03:57,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:03:57,996 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:03:57,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:03:57,996 INFO L82 PathProgramCache]: Analyzing trace with hash -858598478, now seen corresponding path program 1 times [2020-10-28 19:03:57,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:03:57,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651610208] [2020-10-28 19:03:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:03:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:03:58,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:58,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:58,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:03:58,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:00,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:00,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 19:04:00,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:04:00,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2382 [2020-10-28 19:04:00,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:00,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:04:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:04:00,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 19:04:00,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:00,750 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:04:00,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:00,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:00,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:00,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:00,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:00,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:04:00,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651610208] [2020-10-28 19:04:00,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:00,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:04:00,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138926832] [2020-10-28 19:04:00,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:04:00,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:04:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:04:00,801 INFO L87 Difference]: Start difference. First operand 25120 states and 36567 transitions. Second operand 8 states. [2020-10-28 19:04:01,136 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 19:04:02,351 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:04:02,620 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 19:04:02,876 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:04:06,640 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 19:04:06,919 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:04:07,282 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:04:07,550 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:04:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:11,796 INFO L93 Difference]: Finished difference Result 116999 states and 170697 transitions. [2020-10-28 19:04:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 19:04:11,796 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-10-28 19:04:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:11,973 INFO L225 Difference]: With dead ends: 116999 [2020-10-28 19:04:11,973 INFO L226 Difference]: Without dead ends: 98756 [2020-10-28 19:04:12,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 19:04:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98756 states. [2020-10-28 19:04:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98756 to 32364. [2020-10-28 19:04:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32364 states. [2020-10-28 19:04:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32364 states to 32364 states and 47237 transitions. [2020-10-28 19:04:16,197 INFO L78 Accepts]: Start accepts. Automaton has 32364 states and 47237 transitions. Word has length 90 [2020-10-28 19:04:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:16,198 INFO L481 AbstractCegarLoop]: Abstraction has 32364 states and 47237 transitions. [2020-10-28 19:04:16,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:04:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 32364 states and 47237 transitions. [2020-10-28 19:04:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-28 19:04:16,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:16,206 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] [2020-10-28 19:04:16,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:04:16,206 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:16,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:16,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1028914149, now seen corresponding path program 1 times [2020-10-28 19:04:16,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:16,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856156172] [2020-10-28 19:04:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:16,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:16,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:16,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:16,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:18,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:18,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 19:04:18,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:04:18,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2374 [2020-10-28 19:04:18,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:18,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:04:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:04:18,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 19:04:18,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:18,898 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:04:18,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:18,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:18,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:18,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:18,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:04:18,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:04:18,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856156172] [2020-10-28 19:04:18,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:18,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:04:18,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511366710] [2020-10-28 19:04:18,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:04:18,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:04:18,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:04:18,937 INFO L87 Difference]: Start difference. First operand 32364 states and 47237 transitions. Second operand 8 states. [2020-10-28 19:04:19,328 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 19:04:20,635 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 19:04:20,910 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:04:21,317 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:04:26,139 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:04:26,561 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:04:26,859 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:04:27,164 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 19:04:32,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:32,964 INFO L93 Difference]: Finished difference Result 127023 states and 185257 transitions. [2020-10-28 19:04:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 19:04:32,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 90 [2020-10-28 19:04:32,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:33,126 INFO L225 Difference]: With dead ends: 127023 [2020-10-28 19:04:33,127 INFO L226 Difference]: Without dead ends: 108780 [2020-10-28 19:04:33,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 19:04:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108780 states. [2020-10-28 19:04:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108780 to 39638. [2020-10-28 19:04:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39638 states. [2020-10-28 19:04:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39638 states to 39638 states and 57917 transitions. [2020-10-28 19:04:38,173 INFO L78 Accepts]: Start accepts. Automaton has 39638 states and 57917 transitions. Word has length 90 [2020-10-28 19:04:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:04:38,174 INFO L481 AbstractCegarLoop]: Abstraction has 39638 states and 57917 transitions. [2020-10-28 19:04:38,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:04:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 39638 states and 57917 transitions. [2020-10-28 19:04:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 19:04:38,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:04:38,183 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] [2020-10-28 19:04:38,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:04:38,184 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:04:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:04:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1561161807, now seen corresponding path program 1 times [2020-10-28 19:04:38,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:04:38,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836702936] [2020-10-28 19:04:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:04:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:38,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:38,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:38,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:38,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:38,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:38,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:39,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:39,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:43,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:43,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 19:04:43,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:04:43,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 19:04:43,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:43,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:04:43,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:04:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 19:04:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:43,496 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:04:43,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:04:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:04:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:04:43,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:04:43,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:04:43,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:04:43,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:04:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:04:43,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836702936] [2020-10-28 19:04:43,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:04:43,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:04:43,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825276386] [2020-10-28 19:04:43,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:04:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:04:43,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:04:43,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:04:43,542 INFO L87 Difference]: Start difference. First operand 39638 states and 57917 transitions. Second operand 6 states. [2020-10-28 19:04:43,813 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-28 19:04:45,174 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 19:04:53,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:04:53,407 INFO L93 Difference]: Finished difference Result 115226 states and 168283 transitions. [2020-10-28 19:04:53,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:04:53,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-28 19:04:53,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:04:53,499 INFO L225 Difference]: With dead ends: 115226 [2020-10-28 19:04:53,499 INFO L226 Difference]: Without dead ends: 76025 [2020-10-28 19:04:53,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:04:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76025 states. [2020-10-28 19:05:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76025 to 75766. [2020-10-28 19:05:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75766 states. [2020-10-28 19:05:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75766 states to 75766 states and 110157 transitions. [2020-10-28 19:05:02,090 INFO L78 Accepts]: Start accepts. Automaton has 75766 states and 110157 transitions. Word has length 91 [2020-10-28 19:05:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:02,091 INFO L481 AbstractCegarLoop]: Abstraction has 75766 states and 110157 transitions. [2020-10-28 19:05:02,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:05:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 75766 states and 110157 transitions. [2020-10-28 19:05:02,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 19:05:02,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:02,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:05:02,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:05:02,099 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:02,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1285379850, now seen corresponding path program 1 times [2020-10-28 19:05:02,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:02,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760299209] [2020-10-28 19:05:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:02,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:03,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:03,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:03,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:07,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:07,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 19:05:07,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 19:05:07,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:05:07,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:07,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:05:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:05:07,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 19:05:07,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:07,421 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:05:07,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:07,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:07,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:07,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:07,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:05:07,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:07,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:07,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:07,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:07,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:07,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:07,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760299209] [2020-10-28 19:05:07,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:07,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:05:07,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583079624] [2020-10-28 19:05:07,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:05:07,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:05:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:05:07,463 INFO L87 Difference]: Start difference. First operand 75766 states and 110157 transitions. Second operand 8 states. [2020-10-28 19:05:07,769 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 19:05:09,234 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 19:05:09,616 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:05:09,883 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:05:18,580 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:05:19,338 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:05:19,624 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-28 19:05:20,367 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:05:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:05:36,222 INFO L93 Difference]: Finished difference Result 260991 states and 378129 transitions. [2020-10-28 19:05:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 19:05:36,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-10-28 19:05:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:05:36,759 INFO L225 Difference]: With dead ends: 260991 [2020-10-28 19:05:36,760 INFO L226 Difference]: Without dead ends: 224892 [2020-10-28 19:05:36,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-10-28 19:05:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224892 states. [2020-10-28 19:05:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224892 to 88504. [2020-10-28 19:05:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88504 states. [2020-10-28 19:05:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88504 states to 88504 states and 128735 transitions. [2020-10-28 19:05:48,945 INFO L78 Accepts]: Start accepts. Automaton has 88504 states and 128735 transitions. Word has length 91 [2020-10-28 19:05:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:05:48,946 INFO L481 AbstractCegarLoop]: Abstraction has 88504 states and 128735 transitions. [2020-10-28 19:05:48,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:05:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 88504 states and 128735 transitions. [2020-10-28 19:05:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 19:05:48,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:05:48,958 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] [2020-10-28 19:05:48,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:05:48,958 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:05:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:05:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1206196769, now seen corresponding path program 1 times [2020-10-28 19:05:48,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:05:48,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103108671] [2020-10-28 19:05:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:05:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:49,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:49,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:52,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:52,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:52,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:53,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:53,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 19:05:53,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:05:53,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 19:05:53,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:53,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:53,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:05:53,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 19:05:53,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 19:05:53,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:54,260 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-28 19:05:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:05:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:05:54,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:05:54,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:05:54,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:05:54,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:05:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:05:54,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:05:54,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:05:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:05:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:05:54,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:05:54,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:05:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:05:54,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103108671] [2020-10-28 19:05:54,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:05:54,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 19:05:54,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101269201] [2020-10-28 19:05:54,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:05:54,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:05:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:05:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:05:54,299 INFO L87 Difference]: Start difference. First operand 88504 states and 128735 transitions. Second operand 8 states. [2020-10-28 19:05:54,594 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-10-28 19:05:56,199 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-28 19:05:56,452 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:05:56,861 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-28 19:06:05,971 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-28 19:06:06,735 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-28 19:06:07,071 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-28 19:06:07,364 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 186