/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:54:22,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:54:22,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:54:22,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:54:22,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:54:22,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:54:22,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:54:22,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:54:22,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:54:22,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:54:22,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:54:22,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:54:22,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:54:22,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:54:22,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:54:22,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:54:22,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:54:22,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:54:22,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:54:22,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:54:22,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:54:22,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:54:22,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:54:22,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:54:22,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:54:22,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:54:22,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:54:22,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:54:22,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:54:22,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:54:22,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:54:22,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:54:22,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:54:22,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:54:22,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:54:22,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:54:22,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:54:22,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:54:22,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:54:22,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:54:22,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:54:22,557 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 18:54:22,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:54:22,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:54:22,620 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:54:22,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:54:22,621 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:54:22,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:54:22,621 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:54:22,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:54:22,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:54:22,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:54:22,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:54:22,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:54:22,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:54:22,624 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:54:22,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:54:22,624 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:54:22,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:54:22,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:54:22,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:54:22,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:54:22,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:54:22,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:22,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:54:22,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:54:22,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:54:22,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:54:22,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:54:22,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:54:22,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:54:22,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:54:23,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:54:23,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:54:23,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:54:23,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:54:23,093 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:54:23,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-28 18:54:23,177 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96cde36fd/507526ecfa2c486ab27badb8e2a338a6/FLAGf0bc7c293 [2020-10-28 18:54:24,069 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:54:24,070 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-28 18:54:24,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96cde36fd/507526ecfa2c486ab27badb8e2a338a6/FLAGf0bc7c293 [2020-10-28 18:54:24,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/96cde36fd/507526ecfa2c486ab27badb8e2a338a6 [2020-10-28 18:54:24,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:54:24,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:54:24,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:24,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:54:24,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:54:24,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:24" (1/1) ... [2020-10-28 18:54:24,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a52b48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:24, skipping insertion in model container [2020-10-28 18:54:24,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:24" (1/1) ... [2020-10-28 18:54:24,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:54:24,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:54:24,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:25,002 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:54:25,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:25,275 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:54:25,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25 WrapperNode [2020-10-28 18:54:25,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:25,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:54:25,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:54:25,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:54:25,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (1/1) ... [2020-10-28 18:54:25,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:54:25,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:54:25,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:54:25,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:54:25,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (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 18:54:25,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:54:25,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:54:25,542 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:54:25,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:54:25,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:54:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:54:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:54:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:54:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:54:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:54:25,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:54:25,544 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:54:25,544 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:54:25,544 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:54:25,544 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:54:25,544 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:54:25,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:54:25,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:54:25,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:54:25,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:54:25,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:54:27,989 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:54:27,990 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:54:27,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:27 BoogieIcfgContainer [2020-10-28 18:54:27,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:54:27,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:54:27,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:54:27,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:54:27,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:54:24" (1/3) ... [2020-10-28 18:54:28,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d583d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:27, skipping insertion in model container [2020-10-28 18:54:28,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:25" (2/3) ... [2020-10-28 18:54:28,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d583d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:28, skipping insertion in model container [2020-10-28 18:54:28,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:27" (3/3) ... [2020-10-28 18:54:28,002 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-28 18:54:28,017 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:54:28,023 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:54:28,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:54:28,071 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:54:28,071 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:54:28,072 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:54:28,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:54:28,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:54:28,072 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:54:28,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:54:28,072 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:54:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states. [2020-10-28 18:54:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:54:28,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:28,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:28,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash 973982076, now seen corresponding path program 1 times [2020-10-28 18:54:28,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:28,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084719861] [2020-10-28 18:54:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:28,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:29,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:29,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:30,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:30,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:31,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:32,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:32,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:32,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:32,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:33,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:33,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:33,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:54:33,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:54:33,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:54:33,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:33,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:54:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:54:33,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:54:33,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:54:34,639 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:54:34,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:34,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:34,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-28 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:34,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:34,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:34,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:34,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:54:34,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:34,751 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 18:54:34,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084719861] [2020-10-28 18:54:34,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:34,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:54:34,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860920210] [2020-10-28 18:54:34,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:54:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:54:34,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:54:34,778 INFO L87 Difference]: Start difference. First operand 466 states. Second operand 8 states. [2020-10-28 18:54:35,645 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 18:54:40,629 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 317 [2020-10-28 18:54:42,715 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-28 18:54:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:43,052 INFO L93 Difference]: Finished difference Result 801 states and 1365 transitions. [2020-10-28 18:54:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:54:43,054 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:54:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:43,076 INFO L225 Difference]: With dead ends: 801 [2020-10-28 18:54:43,077 INFO L226 Difference]: Without dead ends: 762 [2020-10-28 18:54:43,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:54:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-10-28 18:54:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 475. [2020-10-28 18:54:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-10-28 18:54:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 625 transitions. [2020-10-28 18:54:43,200 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 625 transitions. Word has length 56 [2020-10-28 18:54:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:43,202 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 625 transitions. [2020-10-28 18:54:43,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:54:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 625 transitions. [2020-10-28 18:54:43,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:54:43,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:43,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:43,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:54:43,221 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:43,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:43,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1637126041, now seen corresponding path program 1 times [2020-10-28 18:54:43,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:43,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465211496] [2020-10-28 18:54:43,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:43,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:43,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:44,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:44,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:44,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:45,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:46,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:48,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:48,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:48,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:54:48,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:54:48,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:54:48,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:48,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 18:54:48,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:54:48,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:49,096 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:54:49,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:49,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:49,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:49,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:49,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:54:49,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:49,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:49,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:49,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:49,149 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 18:54:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465211496] [2020-10-28 18:54:49,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:49,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:49,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459231639] [2020-10-28 18:54:49,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:49,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:49,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:49,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:49,153 INFO L87 Difference]: Start difference. First operand 475 states and 625 transitions. Second operand 4 states. [2020-10-28 18:54:49,874 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:54:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:54:52,500 INFO L93 Difference]: Finished difference Result 741 states and 1017 transitions. [2020-10-28 18:54:52,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:54:52,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 18:54:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:54:52,507 INFO L225 Difference]: With dead ends: 741 [2020-10-28 18:54:52,507 INFO L226 Difference]: Without dead ends: 589 [2020-10-28 18:54:52,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:54:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-28 18:54:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 583. [2020-10-28 18:54:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-28 18:54:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 783 transitions. [2020-10-28 18:54:52,548 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 783 transitions. Word has length 56 [2020-10-28 18:54:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:54:52,548 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 783 transitions. [2020-10-28 18:54:52,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:54:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 783 transitions. [2020-10-28 18:54:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:54:52,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:52,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:52,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:54:52,551 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:52,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:52,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1819452989, now seen corresponding path program 1 times [2020-10-28 18:54:52,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:52,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312326758] [2020-10-28 18:54:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:52,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:52,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:52,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:52,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:53,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:54,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:54,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:55,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:56,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:57,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:57,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:54:57,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:54:57,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 18:54:57,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:57,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:57,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:54:57,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:54:57,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 18:54:57,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:58,420 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:54:58,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:58,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:58,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:58,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:58,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:58,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:54:58,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:58,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:58,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:58,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:58,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:54:58,474 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 18:54:58,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312326758] [2020-10-28 18:54:58,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:58,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:54:58,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59349565] [2020-10-28 18:54:58,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:54:58,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:58,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:54:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:54:58,477 INFO L87 Difference]: Start difference. First operand 583 states and 783 transitions. Second operand 7 states. [2020-10-28 18:54:59,204 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 18:55:02,331 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-28 18:55:04,136 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 18:55:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:04,356 INFO L93 Difference]: Finished difference Result 1789 states and 2585 transitions. [2020-10-28 18:55:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:55:04,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-28 18:55:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:04,366 INFO L225 Difference]: With dead ends: 1789 [2020-10-28 18:55:04,366 INFO L226 Difference]: Without dead ends: 1516 [2020-10-28 18:55:04,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:55:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2020-10-28 18:55:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 769. [2020-10-28 18:55:04,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 769 states. [2020-10-28 18:55:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1052 transitions. [2020-10-28 18:55:04,435 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1052 transitions. Word has length 56 [2020-10-28 18:55:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:04,436 INFO L481 AbstractCegarLoop]: Abstraction has 769 states and 1052 transitions. [2020-10-28 18:55:04,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:55:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1052 transitions. [2020-10-28 18:55:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:55:04,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:04,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:04,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:55:04,438 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:04,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:04,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1196561493, now seen corresponding path program 1 times [2020-10-28 18:55:04,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:04,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239140855] [2020-10-28 18:55:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:04,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:04,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:04,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:04,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:05,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:05,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:06,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:06,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:09,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:09,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:55:09,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:55:09,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:55:09,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:09,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:09,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:55:09,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:55:09,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:10,356 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:55:10,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:10,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:10,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:10,424 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 18:55:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239140855] [2020-10-28 18:55:10,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:10,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:55:10,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206397184] [2020-10-28 18:55:10,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:10,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:10,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:10,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:10,426 INFO L87 Difference]: Start difference. First operand 769 states and 1052 transitions. Second operand 8 states. [2020-10-28 18:55:12,164 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 329 DAG size of output: 321 [2020-10-28 18:55:16,101 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:55:18,997 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 324 DAG size of output: 323 [2020-10-28 18:55:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:19,313 INFO L93 Difference]: Finished difference Result 3805 states and 5623 transitions. [2020-10-28 18:55:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 18:55:19,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-28 18:55:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:19,333 INFO L225 Difference]: With dead ends: 3805 [2020-10-28 18:55:19,333 INFO L226 Difference]: Without dead ends: 3435 [2020-10-28 18:55:19,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2020-10-28 18:55:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-10-28 18:55:19,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 783. [2020-10-28 18:55:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2020-10-28 18:55:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1066 transitions. [2020-10-28 18:55:19,444 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1066 transitions. Word has length 56 [2020-10-28 18:55:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:19,444 INFO L481 AbstractCegarLoop]: Abstraction has 783 states and 1066 transitions. [2020-10-28 18:55:19,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1066 transitions. [2020-10-28 18:55:19,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:55:19,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:19,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:19,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:55:19,447 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash 2090707368, now seen corresponding path program 1 times [2020-10-28 18:55:19,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:19,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808395593] [2020-10-28 18:55:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:19,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:21,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:24,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:24,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:55:24,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:55:24,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:55:24,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:24,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:55:24,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:55:24,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:25,240 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:55:25,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:25,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:25,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:25,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:25,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:55:25,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:25,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:25,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:25,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:25,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:25,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:25,294 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 18:55:25,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808395593] [2020-10-28 18:55:25,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:25,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:25,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358238475] [2020-10-28 18:55:25,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:25,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:25,297 INFO L87 Difference]: Start difference. First operand 783 states and 1066 transitions. Second operand 4 states. [2020-10-28 18:55:26,105 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:55:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:29,179 INFO L93 Difference]: Finished difference Result 1563 states and 2210 transitions. [2020-10-28 18:55:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:29,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 18:55:29,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:29,186 INFO L225 Difference]: With dead ends: 1563 [2020-10-28 18:55:29,186 INFO L226 Difference]: Without dead ends: 1172 [2020-10-28 18:55:29,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:55:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2020-10-28 18:55:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1149. [2020-10-28 18:55:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1149 states. [2020-10-28 18:55:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1594 transitions. [2020-10-28 18:55:29,292 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1594 transitions. Word has length 56 [2020-10-28 18:55:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:29,293 INFO L481 AbstractCegarLoop]: Abstraction has 1149 states and 1594 transitions. [2020-10-28 18:55:29,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1594 transitions. [2020-10-28 18:55:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:29,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:29,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:29,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:55:29,295 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1911417059, now seen corresponding path program 1 times [2020-10-28 18:55:29,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:29,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631426395] [2020-10-28 18:55:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:29,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:29,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:29,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:32,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:34,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:34,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:55:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:55:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:35,286 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:55:35,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:35,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:35,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:35,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:35,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:35,353 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 18:55:35,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631426395] [2020-10-28 18:55:35,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:35,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 18:55:35,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59180016] [2020-10-28 18:55:35,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:35,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:35,356 INFO L87 Difference]: Start difference. First operand 1149 states and 1594 transitions. Second operand 8 states. [2020-10-28 18:55:36,224 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-10-28 18:55:40,018 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification that was a NOOP. DAG size: 324 [2020-10-28 18:55:41,018 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-28 18:55:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:42,610 INFO L93 Difference]: Finished difference Result 2960 states and 4322 transitions. [2020-10-28 18:55:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:55:42,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:55:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:42,628 INFO L225 Difference]: With dead ends: 2960 [2020-10-28 18:55:42,628 INFO L226 Difference]: Without dead ends: 2359 [2020-10-28 18:55:42,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:55:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2020-10-28 18:55:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1082. [2020-10-28 18:55:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1082 states. [2020-10-28 18:55:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1500 transitions. [2020-10-28 18:55:42,777 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1500 transitions. Word has length 57 [2020-10-28 18:55:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:42,778 INFO L481 AbstractCegarLoop]: Abstraction has 1082 states and 1500 transitions. [2020-10-28 18:55:42,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1500 transitions. [2020-10-28 18:55:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:42,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:42,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:42,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:55:42,781 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1760658741, now seen corresponding path program 1 times [2020-10-28 18:55:42,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:42,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840500153] [2020-10-28 18:55:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:42,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:42,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:46,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:46,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:47,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:47,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:47,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:47,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:55:47,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:48,638 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:55:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:48,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:48,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:48,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:48,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:48,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 18:55:48,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:48,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:48,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:48,726 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 18:55:48,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840500153] [2020-10-28 18:55:48,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:48,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:48,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088155386] [2020-10-28 18:55:48,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:48,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:48,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:48,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:48,729 INFO L87 Difference]: Start difference. First operand 1082 states and 1500 transitions. Second operand 8 states. [2020-10-28 18:55:49,542 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:55:52,698 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 18:55:54,173 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 18:55:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:54,652 INFO L93 Difference]: Finished difference Result 4043 states and 5884 transitions. [2020-10-28 18:55:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:55:54,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-28 18:55:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:54,670 INFO L225 Difference]: With dead ends: 4043 [2020-10-28 18:55:54,670 INFO L226 Difference]: Without dead ends: 3373 [2020-10-28 18:55:54,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 18:55:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3373 states. [2020-10-28 18:55:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3373 to 1128. [2020-10-28 18:55:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2020-10-28 18:55:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1528 transitions. [2020-10-28 18:55:54,877 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1528 transitions. Word has length 57 [2020-10-28 18:55:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:54,877 INFO L481 AbstractCegarLoop]: Abstraction has 1128 states and 1528 transitions. [2020-10-28 18:55:54,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1528 transitions. [2020-10-28 18:55:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:55:54,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:54,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:54,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:55:54,881 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1320629932, now seen corresponding path program 1 times [2020-10-28 18:55:54,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:54,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119583992] [2020-10-28 18:55:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:54,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:55,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:57,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:57,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:57,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:57,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:57,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:59,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:55:59,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:55:59,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:55:59,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:59,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:55:59,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:55:59,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:00,669 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:00,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:00,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:00,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:00,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:00,705 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 18:56:00,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119583992] [2020-10-28 18:56:00,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:00,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:00,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566715095] [2020-10-28 18:56:00,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:00,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:00,708 INFO L87 Difference]: Start difference. First operand 1128 states and 1528 transitions. Second operand 4 states. [2020-10-28 18:56:01,498 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 18:56:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:03,506 INFO L93 Difference]: Finished difference Result 1551 states and 2132 transitions. [2020-10-28 18:56:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:03,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:56:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:03,512 INFO L225 Difference]: With dead ends: 1551 [2020-10-28 18:56:03,512 INFO L226 Difference]: Without dead ends: 1072 [2020-10-28 18:56:03,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-10-28 18:56:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 976. [2020-10-28 18:56:03,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 976 states. [2020-10-28 18:56:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1324 transitions. [2020-10-28 18:56:03,652 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1324 transitions. Word has length 58 [2020-10-28 18:56:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:03,652 INFO L481 AbstractCegarLoop]: Abstraction has 976 states and 1324 transitions. [2020-10-28 18:56:03,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1324 transitions. [2020-10-28 18:56:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:56:03,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:03,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:03,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:56:03,655 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash -956382570, now seen corresponding path program 1 times [2020-10-28 18:56:03,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:03,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105462203] [2020-10-28 18:56:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:07,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:56:08,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:08,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 18:56:08,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:09,505 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:09,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:09,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:09,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:09,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 18:56:09,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:09,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:09,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:09,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:09,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:09,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:09,617 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 18:56:09,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105462203] [2020-10-28 18:56:09,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:09,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:56:09,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238410907] [2020-10-28 18:56:09,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:56:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:56:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:56:09,620 INFO L87 Difference]: Start difference. First operand 976 states and 1324 transitions. Second operand 7 states. [2020-10-28 18:56:10,428 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 311 [2020-10-28 18:56:13,160 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-28 18:56:14,934 WARN L193 SmtUtils]: Spent 753.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 18:56:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:15,521 INFO L93 Difference]: Finished difference Result 3063 states and 4377 transitions. [2020-10-28 18:56:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 18:56:15,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-28 18:56:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:15,534 INFO L225 Difference]: With dead ends: 3063 [2020-10-28 18:56:15,534 INFO L226 Difference]: Without dead ends: 2581 [2020-10-28 18:56:15,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-10-28 18:56:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2020-10-28 18:56:15,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 1032. [2020-10-28 18:56:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-10-28 18:56:15,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1395 transitions. [2020-10-28 18:56:15,739 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1395 transitions. Word has length 58 [2020-10-28 18:56:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:15,739 INFO L481 AbstractCegarLoop]: Abstraction has 1032 states and 1395 transitions. [2020-10-28 18:56:15,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:56:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1395 transitions. [2020-10-28 18:56:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:56:15,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:15,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:15,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:56:15,742 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:15,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:15,743 INFO L82 PathProgramCache]: Analyzing trace with hash 290063534, now seen corresponding path program 1 times [2020-10-28 18:56:15,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:15,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271721345] [2020-10-28 18:56:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:15,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:16,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:17,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:17,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:17,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:18,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:18,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:18,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:19,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:20,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:20,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:56:20,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:56:20,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:21,561 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:21,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:21,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:21,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:56:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:21,621 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 18:56:21,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271721345] [2020-10-28 18:56:21,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:21,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:56:21,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753255226] [2020-10-28 18:56:21,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:21,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:21,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:21,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:21,623 INFO L87 Difference]: Start difference. First operand 1032 states and 1395 transitions. Second operand 6 states. [2020-10-28 18:56:22,451 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 18:56:25,093 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 18:56:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:25,317 INFO L93 Difference]: Finished difference Result 1785 states and 2478 transitions. [2020-10-28 18:56:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:56:25,317 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:56:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:25,329 INFO L225 Difference]: With dead ends: 1785 [2020-10-28 18:56:25,330 INFO L226 Difference]: Without dead ends: 1091 [2020-10-28 18:56:25,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:56:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2020-10-28 18:56:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1086. [2020-10-28 18:56:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1086 states. [2020-10-28 18:56:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1480 transitions. [2020-10-28 18:56:25,503 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1480 transitions. Word has length 59 [2020-10-28 18:56:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:25,504 INFO L481 AbstractCegarLoop]: Abstraction has 1086 states and 1480 transitions. [2020-10-28 18:56:25,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1480 transitions. [2020-10-28 18:56:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 18:56:25,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:25,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:25,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:56:25,506 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:25,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1913619004, now seen corresponding path program 1 times [2020-10-28 18:56:25,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:25,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283714262] [2020-10-28 18:56:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:25,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:27,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:27,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:27,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:28,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:30,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:30,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 18:56:30,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:56:30,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 18:56:30,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:31,337 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:31,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:31,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:31,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:31,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:56:31,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:31,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:31,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:31,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:31,397 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 18:56:31,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283714262] [2020-10-28 18:56:31,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:31,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 18:56:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104411601] [2020-10-28 18:56:31,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 18:56:31,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 18:56:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:56:31,400 INFO L87 Difference]: Start difference. First operand 1086 states and 1480 transitions. Second operand 9 states. [2020-10-28 18:56:32,230 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-28 18:56:35,246 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-28 18:56:37,611 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-28 18:56:38,383 WARN L193 SmtUtils]: Spent 731.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 18:56:39,287 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 18:56:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:40,775 INFO L93 Difference]: Finished difference Result 4713 states and 6693 transitions. [2020-10-28 18:56:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 18:56:40,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-10-28 18:56:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:40,789 INFO L225 Difference]: With dead ends: 4713 [2020-10-28 18:56:40,789 INFO L226 Difference]: Without dead ends: 4167 [2020-10-28 18:56:40,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2020-10-28 18:56:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2020-10-28 18:56:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 1822. [2020-10-28 18:56:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2020-10-28 18:56:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2535 transitions. [2020-10-28 18:56:41,210 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2535 transitions. Word has length 60 [2020-10-28 18:56:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:41,210 INFO L481 AbstractCegarLoop]: Abstraction has 1822 states and 2535 transitions. [2020-10-28 18:56:41,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 18:56:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2535 transitions. [2020-10-28 18:56:41,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 18:56:41,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:41,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:41,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:56:41,213 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1930296210, now seen corresponding path program 1 times [2020-10-28 18:56:41,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:41,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836124814] [2020-10-28 18:56:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:41,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:41,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:41,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:42,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:45,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:45,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 18:56:45,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:56:45,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4423 [2020-10-28 18:56:45,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:45,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 18:56:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:56:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:56:46,474 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:46,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:46,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:46,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:46,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:46,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:56:46,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:46,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:46,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:46,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:46,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:46,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:46,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836124814] [2020-10-28 18:56:46,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:46,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659512391] [2020-10-28 18:56:46,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:46,516 INFO L87 Difference]: Start difference. First operand 1822 states and 2535 transitions. Second operand 4 states. [2020-10-28 18:56:48,794 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 18:56:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:49,483 INFO L93 Difference]: Finished difference Result 4456 states and 6269 transitions. [2020-10-28 18:56:49,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:49,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-28 18:56:49,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:49,497 INFO L225 Difference]: With dead ends: 4456 [2020-10-28 18:56:49,497 INFO L226 Difference]: Without dead ends: 3118 [2020-10-28 18:56:49,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:49,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2020-10-28 18:56:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3112. [2020-10-28 18:56:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3112 states. [2020-10-28 18:56:50,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 4271 transitions. [2020-10-28 18:56:50,044 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 4271 transitions. Word has length 61 [2020-10-28 18:56:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:50,044 INFO L481 AbstractCegarLoop]: Abstraction has 3112 states and 4271 transitions. [2020-10-28 18:56:50,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 4271 transitions. [2020-10-28 18:56:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 18:56:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:50,048 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] [2020-10-28 18:56:50,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:56:50,048 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1858698138, now seen corresponding path program 1 times [2020-10-28 18:56:50,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:50,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140417573] [2020-10-28 18:56:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:50,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:50,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:50,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:50,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1370 [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:56:51,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:56:51,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:56:51,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:52,143 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:56:52,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:52,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:52,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:52,180 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 18:56:52,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140417573] [2020-10-28 18:56:52,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:52,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:56:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445442843] [2020-10-28 18:56:52,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:56:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:56:52,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:56:52,183 INFO L87 Difference]: Start difference. First operand 3112 states and 4271 transitions. Second operand 4 states. [2020-10-28 18:56:52,928 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 18:56:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:55,489 INFO L93 Difference]: Finished difference Result 7717 states and 10789 transitions. [2020-10-28 18:56:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:56:55,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-28 18:56:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:55,504 INFO L225 Difference]: With dead ends: 7717 [2020-10-28 18:56:55,504 INFO L226 Difference]: Without dead ends: 4971 [2020-10-28 18:56:55,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:56:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2020-10-28 18:56:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 3784. [2020-10-28 18:56:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-10-28 18:56:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5254 transitions. [2020-10-28 18:56:56,151 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5254 transitions. Word has length 62 [2020-10-28 18:56:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:56,151 INFO L481 AbstractCegarLoop]: Abstraction has 3784 states and 5254 transitions. [2020-10-28 18:56:56,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:56:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5254 transitions. [2020-10-28 18:56:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:56:56,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:56,155 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] [2020-10-28 18:56:56,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:56:56,155 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:56,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1997364464, now seen corresponding path program 1 times [2020-10-28 18:56:56,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:56,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315167444] [2020-10-28 18:56:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:56,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:57,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:57,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:58,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4275 [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:57:00,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:57:00,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 18:57:00,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:01,575 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:57:01,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:01,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:01,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:01,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:01,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:01,624 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 18:57:01,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315167444] [2020-10-28 18:57:01,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:01,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-28 18:57:01,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580533700] [2020-10-28 18:57:01,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:57:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:01,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:57:01,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:57:01,626 INFO L87 Difference]: Start difference. First operand 3784 states and 5254 transitions. Second operand 13 states. [2020-10-28 18:57:02,543 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 321 [2020-10-28 18:57:03,242 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-28 18:57:07,444 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 327 [2020-10-28 18:57:08,464 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-28 18:57:09,760 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 320 [2020-10-28 18:57:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:11,433 INFO L93 Difference]: Finished difference Result 14891 states and 21005 transitions. [2020-10-28 18:57:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 18:57:11,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2020-10-28 18:57:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:11,473 INFO L225 Difference]: With dead ends: 14891 [2020-10-28 18:57:11,473 INFO L226 Difference]: Without dead ends: 13099 [2020-10-28 18:57:11,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2020-10-28 18:57:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13099 states. [2020-10-28 18:57:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13099 to 8317. [2020-10-28 18:57:13,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8317 states. [2020-10-28 18:57:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 11773 transitions. [2020-10-28 18:57:13,106 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 11773 transitions. Word has length 63 [2020-10-28 18:57:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:13,106 INFO L481 AbstractCegarLoop]: Abstraction has 8317 states and 11773 transitions. [2020-10-28 18:57:13,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 18:57:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 11773 transitions. [2020-10-28 18:57:13,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:57:13,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:13,115 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] [2020-10-28 18:57:13,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:57:13,115 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1298309136, now seen corresponding path program 1 times [2020-10-28 18:57:13,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:13,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736406543] [2020-10-28 18:57:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:13,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 18:57:18,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:18,894 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:57:18,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:18,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:18,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:18,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:18,939 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 18:57:18,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736406543] [2020-10-28 18:57:18,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:18,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:18,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526153229] [2020-10-28 18:57:18,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:18,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:18,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:18,941 INFO L87 Difference]: Start difference. First operand 8317 states and 11773 transitions. Second operand 4 states. [2020-10-28 18:57:19,760 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-28 18:57:23,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:23,815 INFO L93 Difference]: Finished difference Result 21941 states and 31301 transitions. [2020-10-28 18:57:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:23,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:57:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:23,852 INFO L225 Difference]: With dead ends: 21941 [2020-10-28 18:57:23,852 INFO L226 Difference]: Without dead ends: 15000 [2020-10-28 18:57:23,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15000 states. [2020-10-28 18:57:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15000 to 14997. [2020-10-28 18:57:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14997 states. [2020-10-28 18:57:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14997 states to 14997 states and 21092 transitions. [2020-10-28 18:57:27,035 INFO L78 Accepts]: Start accepts. Automaton has 14997 states and 21092 transitions. Word has length 72 [2020-10-28 18:57:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:27,035 INFO L481 AbstractCegarLoop]: Abstraction has 14997 states and 21092 transitions. [2020-10-28 18:57:27,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 14997 states and 21092 transitions. [2020-10-28 18:57:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:57:27,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:27,047 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] [2020-10-28 18:57:27,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:57:27,048 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:27,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:27,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1176232216, now seen corresponding path program 1 times [2020-10-28 18:57:27,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:27,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867417176] [2020-10-28 18:57:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:27,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:28,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3319 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:57:30,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:31,121 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:57:31,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:31,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:31,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:57:31,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:31,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:31,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:31,158 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 18:57:31,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867417176] [2020-10-28 18:57:31,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:31,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:31,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877108917] [2020-10-28 18:57:31,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:31,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:31,160 INFO L87 Difference]: Start difference. First operand 14997 states and 21092 transitions. Second operand 4 states. [2020-10-28 18:57:31,912 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-28 18:57:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:38,574 INFO L93 Difference]: Finished difference Result 39069 states and 55060 transitions. [2020-10-28 18:57:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:38,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-28 18:57:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:38,640 INFO L225 Difference]: With dead ends: 39069 [2020-10-28 18:57:38,641 INFO L226 Difference]: Without dead ends: 25504 [2020-10-28 18:57:38,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25504 states. [2020-10-28 18:57:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25504 to 23081. [2020-10-28 18:57:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23081 states. [2020-10-28 18:57:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23081 states to 23081 states and 32135 transitions. [2020-10-28 18:57:44,202 INFO L78 Accepts]: Start accepts. Automaton has 23081 states and 32135 transitions. Word has length 73 [2020-10-28 18:57:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:44,202 INFO L481 AbstractCegarLoop]: Abstraction has 23081 states and 32135 transitions. [2020-10-28 18:57:44,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:57:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 23081 states and 32135 transitions. [2020-10-28 18:57:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:57:44,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:44,211 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] [2020-10-28 18:57:44,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:57:44,212 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:44,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1806776019, now seen corresponding path program 1 times [2020-10-28 18:57:44,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:44,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117961177] [2020-10-28 18:57:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:44,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:44,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:45,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1557 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:57:45,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:46,571 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 18:57:46,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:46,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:46,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:46,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:46,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:57:46,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:46,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:57:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:46,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:57:46,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:46,605 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 18:57:46,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117961177] [2020-10-28 18:57:46,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:46,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:57:46,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587436267] [2020-10-28 18:57:46,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:57:46,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:46,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:57:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:57:46,607 INFO L87 Difference]: Start difference. First operand 23081 states and 32135 transitions. Second operand 4 states. [2020-10-28 18:57:47,352 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 315 [2020-10-28 18:57:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:57,133 INFO L93 Difference]: Finished difference Result 62031 states and 86287 transitions. [2020-10-28 18:57:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:57:57,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 18:57:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:57,203 INFO L225 Difference]: With dead ends: 62031 [2020-10-28 18:57:57,204 INFO L226 Difference]: Without dead ends: 40382 [2020-10-28 18:57:57,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:57:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40382 states.