/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.6.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:41:31,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:41:31,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:41:31,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:41:31,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:41:31,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:41:31,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:41:31,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:41:31,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:41:31,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:41:31,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:41:31,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:41:31,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:41:31,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:41:31,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:41:31,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:41:31,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:41:31,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:41:31,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:41:31,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:41:31,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:41:31,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:41:31,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:41:31,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:41:31,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:41:31,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:41:31,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:41:31,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:41:31,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:41:31,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:41:31,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:41:31,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:41:31,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:41:31,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:41:31,509 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:41:31,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:41:31,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:41:31,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:41:31,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:41:31,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:41:31,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:41:31,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 18:41:31,573 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:41:31,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:41:31,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:41:31,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:41:31,578 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:41:31,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:41:31,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:41:31,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:41:31,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:41:31,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:41:31,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:41:31,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:41:31,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:41:31,581 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:41:31,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:41:31,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:41:31,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:41:31,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:41:31,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:41:31,583 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:41:31,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:41:31,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:41:31,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:41:31,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:41:31,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:41:31,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:41:31,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:41:31,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:41:31,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:41:31,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:41:32,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:41:32,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:41:32,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:41:32,061 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:41:32,062 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:41:32,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:41:32,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff743b20c/45b00a43989649fbaaa07a678383553c/FLAGd2524cff6 [2020-10-28 18:41:33,163 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:41:33,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:41:33,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff743b20c/45b00a43989649fbaaa07a678383553c/FLAGd2524cff6 [2020-10-28 18:41:33,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff743b20c/45b00a43989649fbaaa07a678383553c [2020-10-28 18:41:33,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:41:33,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:41:33,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:41:33,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:41:33,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:41:33,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:41:33" (1/1) ... [2020-10-28 18:41:33,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6240429e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:33, skipping insertion in model container [2020-10-28 18:41:33,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:41:33" (1/1) ... [2020-10-28 18:41:33,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:41:33,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:41:35,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:41:35,721 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:41:36,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:41:36,642 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:41:36,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36 WrapperNode [2020-10-28 18:41:36,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:41:36,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:41:36,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:41:36,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:41:36,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... [2020-10-28 18:41:36,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:41:36,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:41:36,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:41:36,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:41:36,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:41:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:41:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:41:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:41:37,053 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:41:37,053 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:41:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:41:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:41:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:41:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:41:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:41:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:41:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:41:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:41:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:41:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:41:37,054 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 18:41:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:41:37,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:41:37,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:41:44,805 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:41:44,805 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:41:44,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:41:44 BoogieIcfgContainer [2020-10-28 18:41:44,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:41:44,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:41:44,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:41:44,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:41:44,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:41:33" (1/3) ... [2020-10-28 18:41:44,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3667eaa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:41:44, skipping insertion in model container [2020-10-28 18:41:44,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:41:36" (2/3) ... [2020-10-28 18:41:44,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3667eaa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:41:44, skipping insertion in model container [2020-10-28 18:41:44,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:41:44" (3/3) ... [2020-10-28 18:41:44,825 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-28 18:41:44,841 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:41:44,853 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:41:44,870 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:41:44,970 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:41:44,970 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:41:44,971 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:41:44,971 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:41:44,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:41:44,971 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:41:44,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:41:44,971 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:41:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states. [2020-10-28 18:41:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 18:41:45,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:41:45,153 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 18:41:45,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:41:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:41:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1412789034, now seen corresponding path program 1 times [2020-10-28 18:41:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:41:45,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170350783] [2020-10-28 18:41:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:41:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:45,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:46,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:46,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:47,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:49,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:49,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:50,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:50,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 18:41:50,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:41:50,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:41:50,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:50,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:50,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:41:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:41:50,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:41:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:41:53,218 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:41:53,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:41:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:41:53,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:41:53,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:41:53,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:41:53,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:41:53,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-28 18:41:53,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:41:53,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:41:53,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:41:53,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:41:53,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:41:53,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:41:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:41:53,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170350783] [2020-10-28 18:41:53,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:41:53,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:41:53,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494931904] [2020-10-28 18:41:53,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:41:53,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:41:53,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:41:53,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:41:53,483 INFO L87 Difference]: Start difference. First operand 2357 states. Second operand 6 states. [2020-10-28 18:41:55,406 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-28 18:42:17,697 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-28 18:42:18,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:18,634 INFO L93 Difference]: Finished difference Result 3388 states and 6000 transitions. [2020-10-28 18:42:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:42:18,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-28 18:42:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:18,681 INFO L225 Difference]: With dead ends: 3388 [2020-10-28 18:42:18,681 INFO L226 Difference]: Without dead ends: 2275 [2020-10-28 18:42:18,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:42:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2020-10-28 18:42:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 2211. [2020-10-28 18:42:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2211 states. [2020-10-28 18:42:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 2917 transitions. [2020-10-28 18:42:18,879 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 2917 transitions. Word has length 91 [2020-10-28 18:42:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:18,879 INFO L481 AbstractCegarLoop]: Abstraction has 2211 states and 2917 transitions. [2020-10-28 18:42:18,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:42:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 2917 transitions. [2020-10-28 18:42:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 18:42:18,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:18,888 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 18:42:18,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:42:18,889 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:18,890 INFO L82 PathProgramCache]: Analyzing trace with hash -448934761, now seen corresponding path program 1 times [2020-10-28 18:42:18,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:18,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438179504] [2020-10-28 18:42:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:19,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:19,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:19,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:19,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:20,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:21,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:22,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:23,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:23,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:23,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:23,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 18:42:23,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:42:23,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 18:42:23,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:23,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:42:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:42:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:42:23,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:42:26,005 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:42:26,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:26,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:26,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:26,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:26,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 18:42:26,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:26,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:42:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:26,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:42:26,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:42:26,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438179504] [2020-10-28 18:42:26,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:26,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:42:26,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508071246] [2020-10-28 18:42:26,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:42:26,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:26,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:42:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:42:26,243 INFO L87 Difference]: Start difference. First operand 2211 states and 2917 transitions. Second operand 8 states. [2020-10-28 18:42:29,811 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 510 DAG size of output: 509 [2020-10-28 18:42:45,553 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 508 [2020-10-28 18:42:48,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:42:48,395 INFO L93 Difference]: Finished difference Result 2767 states and 3730 transitions. [2020-10-28 18:42:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:42:48,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-10-28 18:42:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:42:48,409 INFO L225 Difference]: With dead ends: 2767 [2020-10-28 18:42:48,409 INFO L226 Difference]: Without dead ends: 2595 [2020-10-28 18:42:48,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:42:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2020-10-28 18:42:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2209. [2020-10-28 18:42:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2020-10-28 18:42:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 2914 transitions. [2020-10-28 18:42:48,517 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 2914 transitions. Word has length 91 [2020-10-28 18:42:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:42:48,518 INFO L481 AbstractCegarLoop]: Abstraction has 2209 states and 2914 transitions. [2020-10-28 18:42:48,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:42:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 2914 transitions. [2020-10-28 18:42:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 18:42:48,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:42:48,525 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 18:42:48,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:42:48,525 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:42:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:42:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash 550791888, now seen corresponding path program 1 times [2020-10-28 18:42:48,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:42:48,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518908934] [2020-10-28 18:42:48,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:42:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:48,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:48,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:49,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:49,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:50,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:53,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:53,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 18:42:53,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:42:53,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:42:53,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:53,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:42:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:42:53,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:42:53,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:55,394 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:42:55,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:42:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:42:55,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:42:55,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:42:55,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:42:55,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:42:55,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 18:42:55,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:42:55,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:42:55,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:42:55,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:42:55,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:42:55,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:42:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:42:55,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518908934] [2020-10-28 18:42:55,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:42:55,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:42:55,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374620862] [2020-10-28 18:42:55,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:42:55,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:42:55,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:42:55,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:42:55,550 INFO L87 Difference]: Start difference. First operand 2209 states and 2914 transitions. Second operand 6 states. [2020-10-28 18:42:59,095 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 505 DAG size of output: 504 [2020-10-28 18:43:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:08,194 INFO L93 Difference]: Finished difference Result 2455 states and 3249 transitions. [2020-10-28 18:43:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 18:43:08,195 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-28 18:43:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:08,207 INFO L225 Difference]: With dead ends: 2455 [2020-10-28 18:43:08,207 INFO L226 Difference]: Without dead ends: 1393 [2020-10-28 18:43:08,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:43:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2020-10-28 18:43:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2020-10-28 18:43:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2020-10-28 18:43:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1840 transitions. [2020-10-28 18:43:08,286 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1840 transitions. Word has length 91 [2020-10-28 18:43:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:08,288 INFO L481 AbstractCegarLoop]: Abstraction has 1393 states and 1840 transitions. [2020-10-28 18:43:08,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:43:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1840 transitions. [2020-10-28 18:43:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:43:08,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:08,294 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 18:43:08,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:43:08,294 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:08,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1435491959, now seen corresponding path program 1 times [2020-10-28 18:43:08,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:08,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380222116] [2020-10-28 18:43:08,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:08,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:08,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:08,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:08,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:08,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:09,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:13,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:13,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:43:13,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:43:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 18:43:13,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:13,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:43:13,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:43:13,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 18:43:13,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:15,237 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:43:15,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:15,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:15,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:15,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:15,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:15,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 18:43:15,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:15,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:43:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:43:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380222116] [2020-10-28 18:43:15,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:15,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:43:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760561770] [2020-10-28 18:43:15,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:43:15,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:43:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:43:15,352 INFO L87 Difference]: Start difference. First operand 1393 states and 1840 transitions. Second operand 6 states. [2020-10-28 18:43:17,121 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 505 [2020-10-28 18:43:25,379 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 503 [2020-10-28 18:43:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:26,180 INFO L93 Difference]: Finished difference Result 2159 states and 2904 transitions. [2020-10-28 18:43:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:43:26,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 92 [2020-10-28 18:43:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:26,189 INFO L225 Difference]: With dead ends: 2159 [2020-10-28 18:43:26,190 INFO L226 Difference]: Without dead ends: 1433 [2020-10-28 18:43:26,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:43:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2020-10-28 18:43:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1367. [2020-10-28 18:43:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2020-10-28 18:43:26,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1867 transitions. [2020-10-28 18:43:26,279 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1867 transitions. Word has length 92 [2020-10-28 18:43:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:26,280 INFO L481 AbstractCegarLoop]: Abstraction has 1367 states and 1867 transitions. [2020-10-28 18:43:26,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:43:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1867 transitions. [2020-10-28 18:43:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:43:26,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:26,283 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 18:43:26,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:43:26,284 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:26,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash 710133455, now seen corresponding path program 1 times [2020-10-28 18:43:26,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:26,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199605915] [2020-10-28 18:43:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:26,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:26,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:26,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:26,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:27,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:27,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:28,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:29,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:31,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:31,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:43:31,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:43:31,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 18:43:31,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:31,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:43:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:43:31,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 18:43:31,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:33,147 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:43:33,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:33,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:33,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:33,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:33,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:33,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:43:33,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:33,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:43:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:43:33,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:33,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199605915] [2020-10-28 18:43:33,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:33,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:43:33,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919888652] [2020-10-28 18:43:33,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:43:33,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:43:33,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:43:33,241 INFO L87 Difference]: Start difference. First operand 1367 states and 1867 transitions. Second operand 7 states. [2020-10-28 18:43:35,095 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-28 18:43:42,722 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:43:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:43:44,889 INFO L93 Difference]: Finished difference Result 2449 states and 3459 transitions. [2020-10-28 18:43:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:43:44,890 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-28 18:43:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:43:44,899 INFO L225 Difference]: With dead ends: 2449 [2020-10-28 18:43:44,899 INFO L226 Difference]: Without dead ends: 2109 [2020-10-28 18:43:44,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:43:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2020-10-28 18:43:44,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1367. [2020-10-28 18:43:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1367 states. [2020-10-28 18:43:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 1866 transitions. [2020-10-28 18:43:44,991 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 1866 transitions. Word has length 92 [2020-10-28 18:43:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:43:44,992 INFO L481 AbstractCegarLoop]: Abstraction has 1367 states and 1866 transitions. [2020-10-28 18:43:44,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:43:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 1866 transitions. [2020-10-28 18:43:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-28 18:43:44,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:43:44,995 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, 1, 1] [2020-10-28 18:43:44,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:43:44,995 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:43:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:43:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1906856387, now seen corresponding path program 1 times [2020-10-28 18:43:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:43:44,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151163731] [2020-10-28 18:43:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:43:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:45,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:45,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:45,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:46,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:47,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:49,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:50,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:50,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-28 18:43:50,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:43:50,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:43:50,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:50,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:43:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:43:50,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 18:43:50,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:51,833 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:43:51,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:43:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:43:51,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:43:51,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:43:51,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:43:51,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:43:51,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:43:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:43:51,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151163731] [2020-10-28 18:43:51,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:43:51,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:43:51,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435779703] [2020-10-28 18:43:51,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:43:51,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:43:51,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:43:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:43:51,949 INFO L87 Difference]: Start difference. First operand 1367 states and 1866 transitions. Second operand 8 states. [2020-10-28 18:43:53,657 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-28 18:44:01,243 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 508 [2020-10-28 18:44:03,773 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-28 18:44:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:44:05,337 INFO L93 Difference]: Finished difference Result 2388 states and 3387 transitions. [2020-10-28 18:44:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:44:05,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 92 [2020-10-28 18:44:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:44:05,347 INFO L225 Difference]: With dead ends: 2388 [2020-10-28 18:44:05,347 INFO L226 Difference]: Without dead ends: 2058 [2020-10-28 18:44:05,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-28 18:44:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2020-10-28 18:44:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1365. [2020-10-28 18:44:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2020-10-28 18:44:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1863 transitions. [2020-10-28 18:44:05,456 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1863 transitions. Word has length 92 [2020-10-28 18:44:05,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:44:05,457 INFO L481 AbstractCegarLoop]: Abstraction has 1365 states and 1863 transitions. [2020-10-28 18:44:05,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:44:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1863 transitions. [2020-10-28 18:44:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:44:05,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:44:05,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:44:05,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:44:05,461 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:44:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:44:05,461 INFO L82 PathProgramCache]: Analyzing trace with hash 279318241, now seen corresponding path program 1 times [2020-10-28 18:44:05,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:44:05,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842492402] [2020-10-28 18:44:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:44:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:05,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:05,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:05,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:06,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:07,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:09,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:10,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:10,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:10,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 18:44:10,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 18:44:10,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 18:44:10,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:10,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:44:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:44:10,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 18:44:10,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:12,439 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:12,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:12,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:12,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:12,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:12,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:44:12,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:12,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:12,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:44:12,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:12,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:44:12,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:12,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842492402] [2020-10-28 18:44:12,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:12,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:44:12,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231482778] [2020-10-28 18:44:12,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:44:12,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:12,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:44:12,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:44:12,544 INFO L87 Difference]: Start difference. First operand 1365 states and 1863 transitions. Second operand 8 states. [2020-10-28 18:44:14,331 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 510 [2020-10-28 18:44:21,280 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 507 [2020-10-28 18:44:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:44:23,015 INFO L93 Difference]: Finished difference Result 2523 states and 3572 transitions. [2020-10-28 18:44:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:44:23,016 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-28 18:44:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:44:23,023 INFO L225 Difference]: With dead ends: 2523 [2020-10-28 18:44:23,024 INFO L226 Difference]: Without dead ends: 2133 [2020-10-28 18:44:23,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:44:23,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2020-10-28 18:44:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1363. [2020-10-28 18:44:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1363 states. [2020-10-28 18:44:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1860 transitions. [2020-10-28 18:44:23,143 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1860 transitions. Word has length 93 [2020-10-28 18:44:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:44:23,143 INFO L481 AbstractCegarLoop]: Abstraction has 1363 states and 1860 transitions. [2020-10-28 18:44:23,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:44:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1860 transitions. [2020-10-28 18:44:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:44:23,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:44:23,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:44:23,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:44:23,147 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:44:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:44:23,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2130468150, now seen corresponding path program 1 times [2020-10-28 18:44:23,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:44:23,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218497901] [2020-10-28 18:44:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:44:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:23,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:23,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:24,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:25,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:26,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:27,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:28,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:28,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 18:44:28,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 18:44:28,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:29,955 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:29,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:30,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:30,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:30,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:30,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:44:30,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:30,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:30,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:44:30,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:30,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:44:30,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:30,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218497901] [2020-10-28 18:44:30,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:30,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:44:30,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488001472] [2020-10-28 18:44:30,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:44:30,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:44:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:44:30,064 INFO L87 Difference]: Start difference. First operand 1363 states and 1860 transitions. Second operand 8 states. [2020-10-28 18:44:31,835 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 508 [2020-10-28 18:44:41,581 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:44:43,445 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification that was a NOOP. DAG size: 502 [2020-10-28 18:44:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:44:45,615 INFO L93 Difference]: Finished difference Result 3543 states and 5064 transitions. [2020-10-28 18:44:45,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 18:44:45,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-28 18:44:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:44:45,630 INFO L225 Difference]: With dead ends: 3543 [2020-10-28 18:44:45,630 INFO L226 Difference]: Without dead ends: 3212 [2020-10-28 18:44:45,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:44:45,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2020-10-28 18:44:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2442. [2020-10-28 18:44:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2442 states. [2020-10-28 18:44:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3454 transitions. [2020-10-28 18:44:45,870 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3454 transitions. Word has length 93 [2020-10-28 18:44:45,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:44:45,870 INFO L481 AbstractCegarLoop]: Abstraction has 2442 states and 3454 transitions. [2020-10-28 18:44:45,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:44:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3454 transitions. [2020-10-28 18:44:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:44:45,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:44:45,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:44:45,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:44:45,876 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:44:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:44:45,876 INFO L82 PathProgramCache]: Analyzing trace with hash 520772591, now seen corresponding path program 1 times [2020-10-28 18:44:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:44:45,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475400835] [2020-10-28 18:44:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:44:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:45,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:46,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:46,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:46,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:47,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:47,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:48,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:50,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:44:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:44:50,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 18:44:50,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:52,596 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 496 [2020-10-28 18:44:52,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:44:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:44:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:44:52,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:44:52,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:44:52,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:44:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:44:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:44:52,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:44:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:44:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:44:52,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:44:52,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:44:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:44:52,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475400835] [2020-10-28 18:44:52,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:44:52,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:44:52,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764695791] [2020-10-28 18:44:52,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:44:52,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:44:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:44:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:44:52,671 INFO L87 Difference]: Start difference. First operand 2442 states and 3454 transitions. Second operand 7 states. [2020-10-28 18:44:54,470 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 506 [2020-10-28 18:45:02,678 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 504 [2020-10-28 18:45:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:45:05,176 INFO L93 Difference]: Finished difference Result 4616 states and 6720 transitions. [2020-10-28 18:45:05,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 18:45:05,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-28 18:45:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:45:05,191 INFO L225 Difference]: With dead ends: 4616 [2020-10-28 18:45:05,191 INFO L226 Difference]: Without dead ends: 3923 [2020-10-28 18:45:05,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 18:45:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2020-10-28 18:45:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 2442. [2020-10-28 18:45:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2442 states. [2020-10-28 18:45:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3453 transitions. [2020-10-28 18:45:05,427 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3453 transitions. Word has length 93 [2020-10-28 18:45:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:45:05,428 INFO L481 AbstractCegarLoop]: Abstraction has 2442 states and 3453 transitions. [2020-10-28 18:45:05,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:45:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3453 transitions. [2020-10-28 18:45:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 18:45:05,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:45:05,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:45:05,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:45:05,433 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:45:05,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:45:05,434 INFO L82 PathProgramCache]: Analyzing trace with hash 839951218, now seen corresponding path program 1 times [2020-10-28 18:45:05,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:45:05,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755129521] [2020-10-28 18:45:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:45:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:45:05,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:05,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:05,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:06,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:06,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:07,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:08,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:45:08,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...