/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/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:58:37,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:58:37,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:58:37,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:58:37,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:58:37,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:58:37,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:58:37,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:58:37,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:58:37,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:58:37,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:58:37,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:58:37,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:58:37,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:58:37,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:58:37,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:58:37,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:58:37,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:58:37,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:58:37,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:58:37,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:58:37,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:58:37,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:58:37,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:58:37,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:58:37,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:58:37,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:58:37,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:58:37,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:58:37,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:58:37,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:58:37,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:58:37,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:58:37,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:58:37,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:58:37,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:58:37,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:58:37,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:58:37,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:58:37,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:58:37,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:58:37,687 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 08:58:37,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:58:37,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:58:37,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:58:37,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:58:37,738 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:58:37,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:58:37,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:58:37,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:58:37,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:58:37,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:58:37,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:58:37,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:58:37,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:58:37,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:58:37,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:58:37,740 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:58:37,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:58:37,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:58:37,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:58:37,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:58:37,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:58:37,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:58:37,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:58:37,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:58:37,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:58:37,742 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:58:37,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:58:37,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:58:37,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:58:37,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:58:38,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:58:38,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:58:38,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:58:38,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:58:38,175 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:58:38,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2020-10-28 08:58:38,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/448715da8/02956ec33b414e66bdf1f91d4c3824c6/FLAG87c8d675e [2020-10-28 08:58:38,928 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:58:38,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2020-10-28 08:58:38,936 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/448715da8/02956ec33b414e66bdf1f91d4c3824c6/FLAG87c8d675e [2020-10-28 08:58:39,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/448715da8/02956ec33b414e66bdf1f91d4c3824c6 [2020-10-28 08:58:39,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:58:39,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:58:39,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:39,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:58:39,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:58:39,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14eaf318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39, skipping insertion in model container [2020-10-28 08:58:39,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:58:39,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:58:39,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:39,534 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:58:39,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:58:39,581 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:58:39,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39 WrapperNode [2020-10-28 08:58:39,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:58:39,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:58:39,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:58:39,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:58:39,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (1/1) ... [2020-10-28 08:58:39,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:58:39,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:58:39,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:58:39,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:58:39,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (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 08:58:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:58:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:58:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:58:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:58:39,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:58:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:58:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:58:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:58:39,710 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:58:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:58:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:58:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:58:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:58:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:58:39,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:58:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:58:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:58:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:58:39,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:58:40,237 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:58:40,237 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-28 08:58:40,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:40 BoogieIcfgContainer [2020-10-28 08:58:40,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:58:40,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:58:40,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:58:40,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:58:40,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:58:39" (1/3) ... [2020-10-28 08:58:40,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6922c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:40, skipping insertion in model container [2020-10-28 08:58:40,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:58:39" (2/3) ... [2020-10-28 08:58:40,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6922c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:58:40, skipping insertion in model container [2020-10-28 08:58:40,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:58:40" (3/3) ... [2020-10-28 08:58:40,250 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2020-10-28 08:58:40,291 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:58:40,297 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:58:40,311 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:58:40,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:58:40,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:58:40,343 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:58:40,343 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:58:40,343 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:58:40,344 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:58:40,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:58:40,344 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:58:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 08:58:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:58:40,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:40,370 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] [2020-10-28 08:58:40,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1347201846, now seen corresponding path program 1 times [2020-10-28 08:58:40,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:40,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850523834] [2020-10-28 08:58:40,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:40,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:40,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:58:41,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:41,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-28 08:58:41,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:41,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:58:41,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:41,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:58:41,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:41,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:41,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:41,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:58:41,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:41,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:41,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:41,223 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 08:58:41,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850523834] [2020-10-28 08:58:41,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:41,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:58:41,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900882745] [2020-10-28 08:58:41,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:58:41,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:58:41,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:58:41,252 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 08:58:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:41,371 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2020-10-28 08:58:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:58:41,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-28 08:58:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:41,382 INFO L225 Difference]: With dead ends: 64 [2020-10-28 08:58:41,382 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 08:58:41,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:58:41,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 08:58:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 08:58:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 08:58:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-28 08:58:41,432 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-10-28 08:58:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:41,432 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-28 08:58:41,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:58:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-28 08:58:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 08:58:41,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:41,434 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] [2020-10-28 08:58:41,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:58:41,435 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:41,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:41,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1004426154, now seen corresponding path program 1 times [2020-10-28 08:58:41,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:41,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159994003] [2020-10-28 08:58:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:41,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 08:58:41,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:58:41,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-28 08:58:41,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:58:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 08:58:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:58:41,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:41,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:41,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:41,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:41,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:58:41,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:41,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:41,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:41,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:41,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:41,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:41,953 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 08:58:41,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159994003] [2020-10-28 08:58:41,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:58:41,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:58:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238218227] [2020-10-28 08:58:41,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:58:41,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:58:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:41,958 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-10-28 08:58:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:42,069 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-10-28 08:58:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:58:42,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 08:58:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:42,071 INFO L225 Difference]: With dead ends: 58 [2020-10-28 08:58:42,071 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 08:58:42,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:58:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 08:58:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-28 08:58:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 08:58:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-28 08:58:42,083 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-10-28 08:58:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:42,083 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-28 08:58:42,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:58:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-28 08:58:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 08:58:42,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:42,085 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] [2020-10-28 08:58:42,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:58:42,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:42,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1425424922, now seen corresponding path program 1 times [2020-10-28 08:58:42,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:42,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372182227] [2020-10-28 08:58:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:42,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:42,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:42,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:42,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:42,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 08:58:47,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:58:47,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 08:58:47,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:58:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:58:47,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:58:47,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:47,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:47,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:47,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:47,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:58:47,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:47,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:47,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:47,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:47,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:47,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 08:58:47,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372182227] [2020-10-28 08:58:47,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:47,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:58:47,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964136533] [2020-10-28 08:58:47,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:58:47,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:58:47,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:47,200 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-10-28 08:58:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:47,485 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-28 08:58:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:58:47,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-28 08:58:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:47,488 INFO L225 Difference]: With dead ends: 68 [2020-10-28 08:58:47,488 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 08:58:47,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:58:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 08:58:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-10-28 08:58:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 08:58:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-28 08:58:47,517 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 28 [2020-10-28 08:58:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:47,518 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-28 08:58:47,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:58:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-28 08:58:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 08:58:47,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:47,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:47,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:58:47,522 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:47,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash -728308642, now seen corresponding path program 2 times [2020-10-28 08:58:47,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:47,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281034252] [2020-10-28 08:58:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:47,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:47,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 08:58:52,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:58:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 08:58:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:58:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:58:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:58:52,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:52,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:52,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:52,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:52,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:52,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:52,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:52,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:52,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:52,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 08:58:52,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281034252] [2020-10-28 08:58:52,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:52,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:58:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192479860] [2020-10-28 08:58:52,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:58:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:52,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:58:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:52,664 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-28 08:58:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:52,803 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-10-28 08:58:52,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:58:52,803 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-28 08:58:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:52,805 INFO L225 Difference]: With dead ends: 81 [2020-10-28 08:58:52,805 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 08:58:52,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:58:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 08:58:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-28 08:58:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 08:58:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-28 08:58:52,815 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 35 [2020-10-28 08:58:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:52,815 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-28 08:58:52,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:58:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-28 08:58:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 08:58:52,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:52,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:52,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:58:52,817 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:52,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:52,818 INFO L82 PathProgramCache]: Analyzing trace with hash 806831438, now seen corresponding path program 3 times [2020-10-28 08:58:52,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:52,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487239453] [2020-10-28 08:58:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:55,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 08:58:57,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:57,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 08:58:57,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:58:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:58:57,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:58:57,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:57,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:57,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:57,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:57,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:57,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:57,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:58:57,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:57,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:57,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:58:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-28 08:58:57,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487239453] [2020-10-28 08:58:57,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:57,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:58:57,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390520674] [2020-10-28 08:58:57,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:58:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:58:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:57,959 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 7 states. [2020-10-28 08:58:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:58,169 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2020-10-28 08:58:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:58:58,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-28 08:58:58,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:58,171 INFO L225 Difference]: With dead ends: 94 [2020-10-28 08:58:58,171 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 08:58:58,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:58:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 08:58:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-28 08:58:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 08:58:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-28 08:58:58,189 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2020-10-28 08:58:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:58,189 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-28 08:58:58,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:58:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-28 08:58:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 08:58:58,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:58,194 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:58:58,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:58:58,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash 197932818, now seen corresponding path program 4 times [2020-10-28 08:58:58,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:58,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508713958] [2020-10-28 08:58:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:58,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:58,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:03,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 08:59:03,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:03,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:03,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:03,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:03,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:59:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 08:59:03,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:59:03,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 08:59:03,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:03,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:03,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:03,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:03,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:03,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:03,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-28 08:59:03,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508713958] [2020-10-28 08:59:03,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:03,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:59:03,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538213271] [2020-10-28 08:59:03,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:59:03,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:59:03,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:59:03,336 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 8 states. [2020-10-28 08:59:03,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:03,529 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-28 08:59:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:59:03,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 08:59:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:03,531 INFO L225 Difference]: With dead ends: 107 [2020-10-28 08:59:03,531 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 08:59:03,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:59:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 08:59:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-28 08:59:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 08:59:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-28 08:59:03,541 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 49 [2020-10-28 08:59:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:03,541 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-28 08:59:03,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:59:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-28 08:59:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 08:59:03,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:03,543 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:03,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:59:03,544 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash 599583362, now seen corresponding path program 5 times [2020-10-28 08:59:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:03,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751197699] [2020-10-28 08:59:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:03,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:03,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 08:59:08,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:08,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:08,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:59:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 08:59:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:59:08,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:08,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:08,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:08,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:08,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:59:08,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:08,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:08,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:08,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:08,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:08,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-28 08:59:08,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751197699] [2020-10-28 08:59:08,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:08,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:59:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835715749] [2020-10-28 08:59:08,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:59:08,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:59:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:08,695 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 9 states. [2020-10-28 08:59:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:08,941 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2020-10-28 08:59:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:59:08,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-28 08:59:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:08,943 INFO L225 Difference]: With dead ends: 120 [2020-10-28 08:59:08,943 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 08:59:08,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:59:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 08:59:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2020-10-28 08:59:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 08:59:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-10-28 08:59:08,953 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 56 [2020-10-28 08:59:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:08,954 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-10-28 08:59:08,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:59:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-10-28 08:59:08,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 08:59:08,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:08,956 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:08,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:59:08,956 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:08,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1437119546, now seen corresponding path program 6 times [2020-10-28 08:59:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:08,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27218091] [2020-10-28 08:59:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:09,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:11,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:14,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 08:59:14,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:14,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 08:59:14,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:14,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:59:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:59:14,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:59:14,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:14,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:14,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:14,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:14,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:14,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:14,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:14,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:14,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:14,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:14,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-28 08:59:14,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27218091] [2020-10-28 08:59:14,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:14,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:59:14,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33842820] [2020-10-28 08:59:14,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:59:14,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:14,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:59:14,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:14,168 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 10 states. [2020-10-28 08:59:14,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:14,385 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2020-10-28 08:59:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:59:14,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-28 08:59:14,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:14,387 INFO L225 Difference]: With dead ends: 133 [2020-10-28 08:59:14,387 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 08:59:14,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:59:14,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 08:59:14,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-28 08:59:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 08:59:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-28 08:59:14,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2020-10-28 08:59:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:14,411 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-28 08:59:14,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:59:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-28 08:59:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 08:59:14,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:14,415 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:14,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:59:14,415 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2078789194, now seen corresponding path program 7 times [2020-10-28 08:59:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:14,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096848734] [2020-10-28 08:59:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:14,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:14,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:17,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:19,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 08:59:19,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:19,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:19,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:19,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:19,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:59:19,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 08:59:19,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:59:19,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:19,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:19,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:19,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:19,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:19,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:19,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:19,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:19,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-28 08:59:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096848734] [2020-10-28 08:59:19,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:19,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:59:19,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450920045] [2020-10-28 08:59:19,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:59:19,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:19,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:59:19,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:19,600 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 11 states. [2020-10-28 08:59:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:19,856 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2020-10-28 08:59:19,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:59:19,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-28 08:59:19,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:19,858 INFO L225 Difference]: With dead ends: 146 [2020-10-28 08:59:19,858 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:59:19,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:59:19,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:59:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-28 08:59:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 08:59:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-28 08:59:19,867 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 70 [2020-10-28 08:59:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:19,867 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-28 08:59:19,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:59:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-28 08:59:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 08:59:19,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:19,869 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:19,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:59:19,869 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:19,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1586569850, now seen corresponding path program 8 times [2020-10-28 08:59:19,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:19,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024585565] [2020-10-28 08:59:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:19,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:19,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:24,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:24,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 08:59:24,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 08:59:24,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:59:24,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:24,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:59:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 08:59:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:59:24,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:25,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:25,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:25,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:25,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:25,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-28 08:59:25,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024585565] [2020-10-28 08:59:25,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:25,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:59:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489323486] [2020-10-28 08:59:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:59:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:59:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:59:25,067 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 12 states. [2020-10-28 08:59:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:25,304 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2020-10-28 08:59:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:59:25,304 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 77 [2020-10-28 08:59:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:25,305 INFO L225 Difference]: With dead ends: 159 [2020-10-28 08:59:25,305 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 08:59:25,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:59:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 08:59:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-10-28 08:59:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 08:59:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-28 08:59:25,314 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 77 [2020-10-28 08:59:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:25,314 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-28 08:59:25,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:59:25,315 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-28 08:59:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 08:59:25,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:25,316 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:25,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:59:25,316 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash -522577174, now seen corresponding path program 9 times [2020-10-28 08:59:25,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:25,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919647669] [2020-10-28 08:59:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:25,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:25,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 08:59:30,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:59:30,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:59:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 08:59:30,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:59:30,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:30,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:30,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:30,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:30,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:30,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:30,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:30,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:30,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:30,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:30,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:30,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:30,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:59:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2020-10-28 08:59:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919647669] [2020-10-28 08:59:30,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:30,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:59:30,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213060393] [2020-10-28 08:59:30,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:59:30,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:30,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:59:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:59:30,554 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 13 states. [2020-10-28 08:59:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:30,949 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2020-10-28 08:59:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:59:30,949 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2020-10-28 08:59:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:30,951 INFO L225 Difference]: With dead ends: 172 [2020-10-28 08:59:30,951 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 08:59:30,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:59:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 08:59:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-28 08:59:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 08:59:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-28 08:59:30,974 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 84 [2020-10-28 08:59:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:30,974 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-28 08:59:30,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:59:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-28 08:59:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 08:59:30,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:30,980 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:30,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:59:30,980 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1012054830, now seen corresponding path program 10 times [2020-10-28 08:59:30,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:30,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778002999] [2020-10-28 08:59:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:31,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:36,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 08:59:36,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:36,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:59:36,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:36,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:36,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:59:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:59:36,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:59:36,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:36,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:36,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:36,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:36,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:36,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:36,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:36,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:36,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:36,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:36,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:36,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2020-10-28 08:59:36,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778002999] [2020-10-28 08:59:36,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:36,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:59:36,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994539709] [2020-10-28 08:59:36,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:59:36,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:36,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:59:36,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:59:36,202 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 14 states. [2020-10-28 08:59:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:36,498 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2020-10-28 08:59:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:59:36,498 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 91 [2020-10-28 08:59:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:36,499 INFO L225 Difference]: With dead ends: 185 [2020-10-28 08:59:36,499 INFO L226 Difference]: Without dead ends: 106 [2020-10-28 08:59:36,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:59:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-28 08:59:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-28 08:59:36,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 08:59:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-28 08:59:36,507 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 91 [2020-10-28 08:59:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:36,507 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-28 08:59:36,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:59:36,508 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-28 08:59:36,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 08:59:36,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:36,509 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:36,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:59:36,509 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 87270942, now seen corresponding path program 11 times [2020-10-28 08:59:36,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:36,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406636292] [2020-10-28 08:59:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:36,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:36,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:59:41,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 08:59:41,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:59:41,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:41,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:41,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:41,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:41,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:41,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:41,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:59:41,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:41,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:41,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:41,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-10-28 08:59:41,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406636292] [2020-10-28 08:59:41,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:41,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:59:41,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891355565] [2020-10-28 08:59:41,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:59:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:59:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:59:41,772 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 15 states. [2020-10-28 08:59:42,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:42,063 INFO L93 Difference]: Finished difference Result 198 states and 209 transitions. [2020-10-28 08:59:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:59:42,069 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-10-28 08:59:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:42,071 INFO L225 Difference]: With dead ends: 198 [2020-10-28 08:59:42,071 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 08:59:42,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:59:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 08:59:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-10-28 08:59:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 08:59:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-28 08:59:42,087 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 98 [2020-10-28 08:59:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:42,087 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-28 08:59:42,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:59:42,087 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-28 08:59:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:59:42,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:42,089 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:42,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:59:42,089 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1022694882, now seen corresponding path program 12 times [2020-10-28 08:59:42,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:42,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165999764] [2020-10-28 08:59:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:42,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:42,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:42,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:47,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:59:47,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:47,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:59:47,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:47,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:47,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:59:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:59:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:59:47,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:47,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:47,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:47,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:47,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2020-10-28 08:59:47,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165999764] [2020-10-28 08:59:47,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:47,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:59:47,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430179486] [2020-10-28 08:59:47,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:59:47,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:59:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:59:47,374 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 16 states. [2020-10-28 08:59:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:47,772 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2020-10-28 08:59:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:59:47,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 105 [2020-10-28 08:59:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:47,774 INFO L225 Difference]: With dead ends: 211 [2020-10-28 08:59:47,774 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 08:59:47,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:59:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 08:59:47,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-28 08:59:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-28 08:59:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-28 08:59:47,786 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2020-10-28 08:59:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:47,786 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-28 08:59:47,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:59:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-28 08:59:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 08:59:47,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:47,788 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:47,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:59:47,788 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash -136981678, now seen corresponding path program 13 times [2020-10-28 08:59:47,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:47,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89735959] [2020-10-28 08:59:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:47,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:52,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:59:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 08:59:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:59:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:53,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:53,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:53,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:53,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:53,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2020-10-28 08:59:53,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89735959] [2020-10-28 08:59:53,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:53,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:59:53,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143557422] [2020-10-28 08:59:53,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:59:53,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:53,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:59:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:59:53,106 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 17 states. [2020-10-28 08:59:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:53,516 INFO L93 Difference]: Finished difference Result 224 states and 235 transitions. [2020-10-28 08:59:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:59:53,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-10-28 08:59:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:53,518 INFO L225 Difference]: With dead ends: 224 [2020-10-28 08:59:53,518 INFO L226 Difference]: Without dead ends: 127 [2020-10-28 08:59:53,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:59:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-28 08:59:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-10-28 08:59:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 08:59:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2020-10-28 08:59:53,528 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 112 [2020-10-28 08:59:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:53,528 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2020-10-28 08:59:53,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:59:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2020-10-28 08:59:53,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:59:53,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:53,530 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:53,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:59:53,530 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:53,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1085197674, now seen corresponding path program 14 times [2020-10-28 08:59:53,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:53,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245358445] [2020-10-28 08:59:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:53,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:53,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:59:58,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:59:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:59:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:58,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:59:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:58,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:58,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:59:58,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:59:58,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:59:58,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:59:58,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:59:58,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:59:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:59:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:59:58,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:59:58,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:59:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2020-10-28 08:59:58,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245358445] [2020-10-28 08:59:58,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:59:58,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:59:58,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523157308] [2020-10-28 08:59:58,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:59:58,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:59:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:59:58,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:59:58,890 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 18 states. [2020-10-28 08:59:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:59:59,241 INFO L93 Difference]: Finished difference Result 237 states and 248 transitions. [2020-10-28 08:59:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:59:59,242 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2020-10-28 08:59:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:59:59,243 INFO L225 Difference]: With dead ends: 237 [2020-10-28 08:59:59,245 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 08:59:59,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:59:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 08:59:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-28 08:59:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-28 08:59:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2020-10-28 08:59:59,261 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 119 [2020-10-28 08:59:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:59:59,261 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2020-10-28 08:59:59,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:59:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2020-10-28 08:59:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-28 08:59:59,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:59:59,266 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:59:59,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:59:59,266 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:59:59,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:59:59,267 INFO L82 PathProgramCache]: Analyzing trace with hash -84827514, now seen corresponding path program 15 times [2020-10-28 08:59:59,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:59:59,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516987616] [2020-10-28 08:59:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:59:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:59:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:59:59,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:00:04,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:04,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:04,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:04,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:04,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-28 09:00:04,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516987616] [2020-10-28 09:00:04,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:04,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:00:04,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465532049] [2020-10-28 09:00:04,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:00:04,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:04,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:00:04,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:00:04,696 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 19 states. [2020-10-28 09:00:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:05,134 INFO L93 Difference]: Finished difference Result 250 states and 261 transitions. [2020-10-28 09:00:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:00:05,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 126 [2020-10-28 09:00:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:05,136 INFO L225 Difference]: With dead ends: 250 [2020-10-28 09:00:05,136 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 09:00:05,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:00:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 09:00:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2020-10-28 09:00:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 09:00:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2020-10-28 09:00:05,145 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 126 [2020-10-28 09:00:05,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:05,145 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2020-10-28 09:00:05,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:00:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2020-10-28 09:00:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:00:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:05,147 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:05,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:00:05,147 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:05,148 INFO L82 PathProgramCache]: Analyzing trace with hash 130027850, now seen corresponding path program 16 times [2020-10-28 09:00:05,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:05,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170038526] [2020-10-28 09:00:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:05,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:10,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 09:00:10,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:10,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-28 09:00:10,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:10,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:10,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:00:10,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 09:00:10,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:00:10,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:10,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:10,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:10,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:10,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:10,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:10,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:00:10,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:10,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:10,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:10,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-28 09:00:10,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170038526] [2020-10-28 09:00:10,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:10,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:00:10,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748410606] [2020-10-28 09:00:10,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:00:10,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:00:10,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:10,581 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 20 states. [2020-10-28 09:00:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:11,056 INFO L93 Difference]: Finished difference Result 263 states and 274 transitions. [2020-10-28 09:00:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:00:11,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 133 [2020-10-28 09:00:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:11,057 INFO L225 Difference]: With dead ends: 263 [2020-10-28 09:00:11,057 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 09:00:11,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:00:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 09:00:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-10-28 09:00:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-28 09:00:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 149 transitions. [2020-10-28 09:00:11,067 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 149 transitions. Word has length 133 [2020-10-28 09:00:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:11,067 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 149 transitions. [2020-10-28 09:00:11,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:00:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 149 transitions. [2020-10-28 09:00:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-28 09:00:11,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:11,069 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:11,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:00:11,069 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1942481990, now seen corresponding path program 17 times [2020-10-28 09:00:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:11,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492591415] [2020-10-28 09:00:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:11,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:11,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:11,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:16,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-28 09:00:16,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-28 09:00:16,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:16,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:00:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 09:00:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:00:16,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:16,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:16,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:16,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:16,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:16,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:16,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-10-28 09:00:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492591415] [2020-10-28 09:00:16,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:16,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:00:16,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524892695] [2020-10-28 09:00:16,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:00:16,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:16,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:00:16,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:16,496 INFO L87 Difference]: Start difference. First operand 145 states and 149 transitions. Second operand 21 states. [2020-10-28 09:00:16,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:16,978 INFO L93 Difference]: Finished difference Result 276 states and 287 transitions. [2020-10-28 09:00:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:00:16,979 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 140 [2020-10-28 09:00:16,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:16,980 INFO L225 Difference]: With dead ends: 276 [2020-10-28 09:00:16,980 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 09:00:16,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:00:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 09:00:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-28 09:00:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-28 09:00:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-28 09:00:16,989 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 140 [2020-10-28 09:00:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:16,989 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-28 09:00:16,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:00:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-28 09:00:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-28 09:00:16,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:16,991 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:16,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:00:16,991 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1071992322, now seen corresponding path program 18 times [2020-10-28 09:00:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:16,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108159203] [2020-10-28 09:00:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:17,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:17,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:00:22,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:00:22,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:00:22,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:22,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:22,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:22,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2020-10-28 09:00:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108159203] [2020-10-28 09:00:22,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:22,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:00:22,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657038378] [2020-10-28 09:00:22,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:00:22,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:00:22,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:22,576 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 22 states. [2020-10-28 09:00:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:23,054 INFO L93 Difference]: Finished difference Result 289 states and 300 transitions. [2020-10-28 09:00:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:00:23,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 147 [2020-10-28 09:00:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:23,057 INFO L225 Difference]: With dead ends: 289 [2020-10-28 09:00:23,057 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 09:00:23,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:00:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 09:00:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-28 09:00:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-28 09:00:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-28 09:00:23,065 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2020-10-28 09:00:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:23,066 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-28 09:00:23,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:00:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-28 09:00:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-28 09:00:23,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:23,068 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:23,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:00:23,068 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1692018414, now seen corresponding path program 19 times [2020-10-28 09:00:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:23,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671664525] [2020-10-28 09:00:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:23,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:23,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:23,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:28,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5157 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:00:28,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:28,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:28,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:28,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1273 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2020-10-28 09:00:28,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671664525] [2020-10-28 09:00:28,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:28,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:00:28,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816978965] [2020-10-28 09:00:28,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:00:28,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:00:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:00:28,676 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 23 states. [2020-10-28 09:00:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:29,237 INFO L93 Difference]: Finished difference Result 302 states and 313 transitions. [2020-10-28 09:00:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:00:29,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 154 [2020-10-28 09:00:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:29,239 INFO L225 Difference]: With dead ends: 302 [2020-10-28 09:00:29,239 INFO L226 Difference]: Without dead ends: 169 [2020-10-28 09:00:29,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:00:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-28 09:00:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2020-10-28 09:00:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-28 09:00:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2020-10-28 09:00:29,249 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 154 [2020-10-28 09:00:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:29,249 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2020-10-28 09:00:29,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:00:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2020-10-28 09:00:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 09:00:29,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:29,251 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:29,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:00:29,252 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:29,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2008683698, now seen corresponding path program 20 times [2020-10-28 09:00:29,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:29,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950538167] [2020-10-28 09:00:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:29,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:29,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:34,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:34,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 09:00:34,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 09:00:34,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:34,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:34,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:34,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:34,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1010 trivial. 0 not checked. [2020-10-28 09:00:34,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950538167] [2020-10-28 09:00:34,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:34,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:00:34,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145548964] [2020-10-28 09:00:34,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:00:34,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:34,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:00:34,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:00:34,764 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand 24 states. [2020-10-28 09:00:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:35,345 INFO L93 Difference]: Finished difference Result 315 states and 326 transitions. [2020-10-28 09:00:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:00:35,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 161 [2020-10-28 09:00:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:35,350 INFO L225 Difference]: With dead ends: 315 [2020-10-28 09:00:35,351 INFO L226 Difference]: Without dead ends: 176 [2020-10-28 09:00:35,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:00:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-28 09:00:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2020-10-28 09:00:35,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-28 09:00:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2020-10-28 09:00:35,370 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 161 [2020-10-28 09:00:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:35,370 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2020-10-28 09:00:35,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:00:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2020-10-28 09:00:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-28 09:00:35,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:35,372 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:35,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:00:35,373 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2039012386, now seen corresponding path program 21 times [2020-10-28 09:00:35,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:35,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596450583] [2020-10-28 09:00:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:35,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:35,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:40,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:40,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-28 09:00:40,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:40,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 09:00:40,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:40,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:00:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 09:00:40,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:00:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:40,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:40,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:40,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:40,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:40,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:40,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:40,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:40,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:40,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:40,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:40,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:40,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1554 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2020-10-28 09:00:40,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596450583] [2020-10-28 09:00:40,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:40,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:00:40,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202330136] [2020-10-28 09:00:40,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:00:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:40,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:00:40,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:00:40,929 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 25 states. [2020-10-28 09:00:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:41,452 INFO L93 Difference]: Finished difference Result 328 states and 339 transitions. [2020-10-28 09:00:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:00:41,453 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 168 [2020-10-28 09:00:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:41,455 INFO L225 Difference]: With dead ends: 328 [2020-10-28 09:00:41,455 INFO L226 Difference]: Without dead ends: 183 [2020-10-28 09:00:41,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:00:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-28 09:00:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-10-28 09:00:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 09:00:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2020-10-28 09:00:41,465 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 168 [2020-10-28 09:00:41,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:41,465 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2020-10-28 09:00:41,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:00:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2020-10-28 09:00:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-28 09:00:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:41,468 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:41,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:00:41,468 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash 595016038, now seen corresponding path program 22 times [2020-10-28 09:00:41,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:41,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687450264] [2020-10-28 09:00:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:41,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:46,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:46,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5415 [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:00:46,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 09:00:46,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:47,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:47,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:47,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:47,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2020-10-28 09:00:47,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687450264] [2020-10-28 09:00:47,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:47,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:00:47,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482283477] [2020-10-28 09:00:47,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:00:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:00:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:00:47,450 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand 26 states. [2020-10-28 09:00:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:48,044 INFO L93 Difference]: Finished difference Result 341 states and 352 transitions. [2020-10-28 09:00:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:00:48,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 175 [2020-10-28 09:00:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:48,046 INFO L225 Difference]: With dead ends: 341 [2020-10-28 09:00:48,046 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 09:00:48,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:00:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 09:00:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-28 09:00:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-28 09:00:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 191 transitions. [2020-10-28 09:00:48,057 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 191 transitions. Word has length 175 [2020-10-28 09:00:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:48,058 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 191 transitions. [2020-10-28 09:00:48,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:00:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 191 transitions. [2020-10-28 09:00:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-28 09:00:48,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:48,059 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:48,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:00:48,062 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:48,062 INFO L82 PathProgramCache]: Analyzing trace with hash -92982442, now seen corresponding path program 23 times [2020-10-28 09:00:48,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780526969] [2020-10-28 09:00:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:48,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:48,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:48,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5679 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-28 09:00:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:00:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:54,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:00:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:00:54,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:00:54,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:00:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-10-28 09:00:54,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780526969] [2020-10-28 09:00:54,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:00:54,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:00:54,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172959378] [2020-10-28 09:00:54,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:00:54,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:00:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:00:54,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:00:54,345 INFO L87 Difference]: Start difference. First operand 187 states and 191 transitions. Second operand 27 states. [2020-10-28 09:00:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:00:54,989 INFO L93 Difference]: Finished difference Result 354 states and 365 transitions. [2020-10-28 09:00:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:00:54,990 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 182 [2020-10-28 09:00:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:00:54,991 INFO L225 Difference]: With dead ends: 354 [2020-10-28 09:00:54,991 INFO L226 Difference]: Without dead ends: 197 [2020-10-28 09:00:54,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:00:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-28 09:00:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-10-28 09:00:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-28 09:00:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2020-10-28 09:00:55,003 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 182 [2020-10-28 09:00:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:00:55,004 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2020-10-28 09:00:55,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:00:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2020-10-28 09:00:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 09:00:55,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:00:55,005 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:00:55,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:00:55,005 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:00:55,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:00:55,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1649729510, now seen corresponding path program 24 times [2020-10-28 09:00:55,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:00:55,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130089147] [2020-10-28 09:00:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:00:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:00:55,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:55,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:00:55,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:00,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:00,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5227 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:01:00,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:00,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:00,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:00,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:00,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:00,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:00,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-28 09:01:00,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130089147] [2020-10-28 09:01:00,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:00,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:01:00,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457578232] [2020-10-28 09:01:00,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:01:00,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:00,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:01:00,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:01:00,997 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand 28 states. [2020-10-28 09:01:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:01,629 INFO L93 Difference]: Finished difference Result 367 states and 378 transitions. [2020-10-28 09:01:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:01:01,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 189 [2020-10-28 09:01:01,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:01,631 INFO L225 Difference]: With dead ends: 367 [2020-10-28 09:01:01,631 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 09:01:01,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:01:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 09:01:01,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-28 09:01:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-28 09:01:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2020-10-28 09:01:01,643 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 189 [2020-10-28 09:01:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:01,645 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2020-10-28 09:01:01,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:01:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2020-10-28 09:01:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-28 09:01:01,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:01,646 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:01,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:01:01,647 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:01,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1397763210, now seen corresponding path program 25 times [2020-10-28 09:01:01,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:01,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842835453] [2020-10-28 09:01:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:01,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:01,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:02,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5205 [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:01:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:01:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-28 09:01:06,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:07,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:07,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:07,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:07,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:07,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:07,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:07,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:07,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-28 09:01:07,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842835453] [2020-10-28 09:01:07,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:07,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:01:07,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746307853] [2020-10-28 09:01:07,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:01:07,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:01:07,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:01:07,517 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 29 states. [2020-10-28 09:01:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:08,215 INFO L93 Difference]: Finished difference Result 380 states and 391 transitions. [2020-10-28 09:01:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:01:08,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 196 [2020-10-28 09:01:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:08,218 INFO L225 Difference]: With dead ends: 380 [2020-10-28 09:01:08,218 INFO L226 Difference]: Without dead ends: 211 [2020-10-28 09:01:08,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:01:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-28 09:01:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2020-10-28 09:01:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-28 09:01:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2020-10-28 09:01:08,228 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 196 [2020-10-28 09:01:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:08,229 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2020-10-28 09:01:08,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:01:08,229 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2020-10-28 09:01:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-28 09:01:08,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:08,230 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:08,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:01:08,230 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 640600270, now seen corresponding path program 26 times [2020-10-28 09:01:08,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:08,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232566258] [2020-10-28 09:01:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:08,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:08,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:08,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:13,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:13,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-28 09:01:13,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5396 [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:01:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:14,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:14,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:14,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:14,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:14,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:14,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:14,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:14,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:14,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:14,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:14,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:14,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:01:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1703 trivial. 0 not checked. [2020-10-28 09:01:14,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232566258] [2020-10-28 09:01:14,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:14,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:01:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2588011] [2020-10-28 09:01:14,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:01:14,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:01:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:14,381 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand 30 states. [2020-10-28 09:01:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:15,088 INFO L93 Difference]: Finished difference Result 393 states and 404 transitions. [2020-10-28 09:01:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:01:15,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 203 [2020-10-28 09:01:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:15,090 INFO L225 Difference]: With dead ends: 393 [2020-10-28 09:01:15,091 INFO L226 Difference]: Without dead ends: 218 [2020-10-28 09:01:15,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:01:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-28 09:01:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-28 09:01:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-28 09:01:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 219 transitions. [2020-10-28 09:01:15,101 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 219 transitions. Word has length 203 [2020-10-28 09:01:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:15,101 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 219 transitions. [2020-10-28 09:01:15,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:01:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 219 transitions. [2020-10-28 09:01:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-10-28 09:01:15,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:15,103 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:15,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:01:15,103 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 726321086, now seen corresponding path program 27 times [2020-10-28 09:01:15,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:15,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164214161] [2020-10-28 09:01:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:15,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:15,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:15,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:20,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:20,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-28 09:01:20,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5268 [2020-10-28 09:01:20,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:20,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:01:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:01:20,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:01:20,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:21,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:21,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:21,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:21,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:01:21,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:21,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:21,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:21,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:01:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2020-10-28 09:01:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164214161] [2020-10-28 09:01:21,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:21,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:01:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748216534] [2020-10-28 09:01:21,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:01:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:01:21,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:21,152 INFO L87 Difference]: Start difference. First operand 215 states and 219 transitions. Second operand 31 states. [2020-10-28 09:01:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:21,894 INFO L93 Difference]: Finished difference Result 406 states and 417 transitions. [2020-10-28 09:01:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:01:21,895 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 210 [2020-10-28 09:01:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:21,897 INFO L225 Difference]: With dead ends: 406 [2020-10-28 09:01:21,897 INFO L226 Difference]: Without dead ends: 225 [2020-10-28 09:01:21,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:01:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-28 09:01:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-28 09:01:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 09:01:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 226 transitions. [2020-10-28 09:01:21,907 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 226 transitions. Word has length 210 [2020-10-28 09:01:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:21,908 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 226 transitions. [2020-10-28 09:01:21,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:01:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 226 transitions. [2020-10-28 09:01:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 09:01:21,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:21,909 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:21,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:01:21,910 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash -497339518, now seen corresponding path program 28 times [2020-10-28 09:01:21,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:21,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296074139] [2020-10-28 09:01:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:21,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:22,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:22,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5135 [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:27,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:01:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:01:27,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:01:27,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:01:27,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:27,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:27,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:27,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:27,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:27,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 09:01:27,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:27,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:27,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:27,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:27,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2758 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1974 trivial. 0 not checked. [2020-10-28 09:01:27,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296074139] [2020-10-28 09:01:27,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:27,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:01:27,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108936351] [2020-10-28 09:01:27,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:01:27,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:01:27,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:27,884 INFO L87 Difference]: Start difference. First operand 222 states and 226 transitions. Second operand 32 states. [2020-10-28 09:01:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:28,536 INFO L93 Difference]: Finished difference Result 419 states and 430 transitions. [2020-10-28 09:01:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:01:28,537 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 217 [2020-10-28 09:01:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:28,539 INFO L225 Difference]: With dead ends: 419 [2020-10-28 09:01:28,539 INFO L226 Difference]: Without dead ends: 232 [2020-10-28 09:01:28,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:01:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-28 09:01:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2020-10-28 09:01:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-28 09:01:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 233 transitions. [2020-10-28 09:01:28,550 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 233 transitions. Word has length 217 [2020-10-28 09:01:28,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:28,550 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 233 transitions. [2020-10-28 09:01:28,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:01:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 233 transitions. [2020-10-28 09:01:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-28 09:01:28,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:28,552 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:28,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:01:28,552 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1695941874, now seen corresponding path program 29 times [2020-10-28 09:01:28,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:28,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784070469] [2020-10-28 09:01:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:28,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:28,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:28,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5936 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 09:01:34,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 09:01:34,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:35,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:35,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:35,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:35,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:35,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:35,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:35,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:35,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:35,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:35,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2958 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2020-10-28 09:01:35,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784070469] [2020-10-28 09:01:35,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:35,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:01:35,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317750762] [2020-10-28 09:01:35,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:01:35,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:01:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:01:35,371 INFO L87 Difference]: Start difference. First operand 229 states and 233 transitions. Second operand 33 states. [2020-10-28 09:01:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:36,124 INFO L93 Difference]: Finished difference Result 432 states and 443 transitions. [2020-10-28 09:01:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:01:36,125 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 224 [2020-10-28 09:01:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:36,126 INFO L225 Difference]: With dead ends: 432 [2020-10-28 09:01:36,126 INFO L226 Difference]: Without dead ends: 239 [2020-10-28 09:01:36,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:01:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-28 09:01:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 236. [2020-10-28 09:01:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-28 09:01:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 240 transitions. [2020-10-28 09:01:36,137 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 240 transitions. Word has length 224 [2020-10-28 09:01:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:36,138 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 240 transitions. [2020-10-28 09:01:36,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:01:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 240 transitions. [2020-10-28 09:01:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-28 09:01:36,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:36,139 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:36,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:01:36,141 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1560895542, now seen corresponding path program 30 times [2020-10-28 09:01:36,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:36,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468594526] [2020-10-28 09:01:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:36,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:36,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:36,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:41,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:01:41,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:42,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:42,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:42,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3165 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2265 trivial. 0 not checked. [2020-10-28 09:01:42,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468594526] [2020-10-28 09:01:42,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:42,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:01:42,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639275643] [2020-10-28 09:01:42,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:01:42,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:42,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:01:42,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:01:42,111 INFO L87 Difference]: Start difference. First operand 236 states and 240 transitions. Second operand 34 states. [2020-10-28 09:01:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:42,807 INFO L93 Difference]: Finished difference Result 445 states and 456 transitions. [2020-10-28 09:01:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:01:42,807 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 231 [2020-10-28 09:01:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:42,810 INFO L225 Difference]: With dead ends: 445 [2020-10-28 09:01:42,810 INFO L226 Difference]: Without dead ends: 246 [2020-10-28 09:01:42,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:01:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-28 09:01:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-28 09:01:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-28 09:01:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2020-10-28 09:01:42,830 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 231 [2020-10-28 09:01:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:42,830 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2020-10-28 09:01:42,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:01:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2020-10-28 09:01:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-28 09:01:42,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:42,837 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:42,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:01:42,837 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash 518186022, now seen corresponding path program 31 times [2020-10-28 09:01:42,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:42,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146777111] [2020-10-28 09:01:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:42,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:43,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:43,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:01:48,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 09:01:48,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 09:01:48,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:48,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:48,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:48,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:48,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3379 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2418 trivial. 0 not checked. [2020-10-28 09:01:48,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146777111] [2020-10-28 09:01:48,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:48,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:01:48,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668731175] [2020-10-28 09:01:48,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:01:48,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:48,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:01:48,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:01:48,932 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand 35 states. [2020-10-28 09:01:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:49,650 INFO L93 Difference]: Finished difference Result 458 states and 469 transitions. [2020-10-28 09:01:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:01:49,650 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 238 [2020-10-28 09:01:49,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:49,652 INFO L225 Difference]: With dead ends: 458 [2020-10-28 09:01:49,652 INFO L226 Difference]: Without dead ends: 253 [2020-10-28 09:01:49,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:01:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-28 09:01:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 250. [2020-10-28 09:01:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-28 09:01:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 254 transitions. [2020-10-28 09:01:49,665 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 254 transitions. Word has length 238 [2020-10-28 09:01:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:49,665 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 254 transitions. [2020-10-28 09:01:49,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:01:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 254 transitions. [2020-10-28 09:01:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 09:01:49,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:49,667 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:49,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:01:49,667 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash 110251754, now seen corresponding path program 32 times [2020-10-28 09:01:49,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:49,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151723756] [2020-10-28 09:01:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:49,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:49,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:50,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:55,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5925 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 09:01:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:56,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:01:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:56,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:01:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:01:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:01:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2020-10-28 09:01:56,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151723756] [2020-10-28 09:01:56,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:01:56,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:01:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546188937] [2020-10-28 09:01:56,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:01:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:01:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:01:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:01:56,595 INFO L87 Difference]: Start difference. First operand 250 states and 254 transitions. Second operand 36 states. [2020-10-28 09:01:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:01:57,493 INFO L93 Difference]: Finished difference Result 471 states and 482 transitions. [2020-10-28 09:01:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:01:57,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 245 [2020-10-28 09:01:57,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:01:57,495 INFO L225 Difference]: With dead ends: 471 [2020-10-28 09:01:57,495 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 09:01:57,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:01:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 09:01:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-10-28 09:01:57,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-28 09:01:57,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2020-10-28 09:01:57,507 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 245 [2020-10-28 09:01:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:01:57,507 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2020-10-28 09:01:57,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:01:57,507 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2020-10-28 09:01:57,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-28 09:01:57,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:01:57,509 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:01:57,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:01:57,509 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:01:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:01:57,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1302174374, now seen corresponding path program 33 times [2020-10-28 09:01:57,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:01:57,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508393733] [2020-10-28 09:01:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:01:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:01:57,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:01:57,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:04,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6564 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-28 09:02:04,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:05,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:05,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:05,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2020-10-28 09:02:05,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508393733] [2020-10-28 09:02:05,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:05,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:02:05,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975419688] [2020-10-28 09:02:05,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:02:05,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:02:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:02:05,105 INFO L87 Difference]: Start difference. First operand 257 states and 261 transitions. Second operand 37 states. [2020-10-28 09:02:05,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:05,986 INFO L93 Difference]: Finished difference Result 484 states and 495 transitions. [2020-10-28 09:02:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:02:05,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 252 [2020-10-28 09:02:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:05,989 INFO L225 Difference]: With dead ends: 484 [2020-10-28 09:02:05,989 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 09:02:05,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:02:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 09:02:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2020-10-28 09:02:05,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-28 09:02:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2020-10-28 09:02:06,000 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 252 [2020-10-28 09:02:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:06,001 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2020-10-28 09:02:06,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:02:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2020-10-28 09:02:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 09:02:06,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:06,002 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:06,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:02:06,003 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1261502562, now seen corresponding path program 34 times [2020-10-28 09:02:06,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:06,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484775491] [2020-10-28 09:02:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:06,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:06,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:12,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:12,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-28 09:02:12,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:12,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6097 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-28 09:02:12,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:13,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:13,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:13,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:13,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:13,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:13,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4063 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2907 trivial. 0 not checked. [2020-10-28 09:02:13,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484775491] [2020-10-28 09:02:13,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:13,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:02:13,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266837317] [2020-10-28 09:02:13,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:02:13,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:13,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:02:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:02:13,209 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand 38 states. [2020-10-28 09:02:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:14,164 INFO L93 Difference]: Finished difference Result 497 states and 508 transitions. [2020-10-28 09:02:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:02:14,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 259 [2020-10-28 09:02:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:14,167 INFO L225 Difference]: With dead ends: 497 [2020-10-28 09:02:14,167 INFO L226 Difference]: Without dead ends: 274 [2020-10-28 09:02:14,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:02:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-28 09:02:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-10-28 09:02:14,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-28 09:02:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 275 transitions. [2020-10-28 09:02:14,177 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 275 transitions. Word has length 259 [2020-10-28 09:02:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:14,177 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 275 transitions. [2020-10-28 09:02:14,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:02:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 275 transitions. [2020-10-28 09:02:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-28 09:02:14,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:14,179 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:14,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:02:14,179 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1262122866, now seen corresponding path program 35 times [2020-10-28 09:02:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:14,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341323975] [2020-10-28 09:02:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:14,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:14,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:19,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:19,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-28 09:02:19,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:19,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5173 [2020-10-28 09:02:19,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:19,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:19,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:02:19,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 120 [2020-10-28 09:02:19,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 09:02:19,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:20,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:20,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:20,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:20,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:20,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:20,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2020-10-28 09:02:20,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341323975] [2020-10-28 09:02:20,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:20,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:02:20,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599591333] [2020-10-28 09:02:20,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:02:20,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:20,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:02:20,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:20,528 INFO L87 Difference]: Start difference. First operand 271 states and 275 transitions. Second operand 39 states. [2020-10-28 09:02:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:21,525 INFO L93 Difference]: Finished difference Result 510 states and 521 transitions. [2020-10-28 09:02:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 09:02:21,526 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 266 [2020-10-28 09:02:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:21,528 INFO L225 Difference]: With dead ends: 510 [2020-10-28 09:02:21,528 INFO L226 Difference]: Without dead ends: 281 [2020-10-28 09:02:21,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:02:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-28 09:02:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 278. [2020-10-28 09:02:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-28 09:02:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2020-10-28 09:02:21,539 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 266 [2020-10-28 09:02:21,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:21,540 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2020-10-28 09:02:21,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 09:02:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2020-10-28 09:02:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-28 09:02:21,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:21,542 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:21,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 09:02:21,542 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:21,543 INFO L82 PathProgramCache]: Analyzing trace with hash 588804690, now seen corresponding path program 36 times [2020-10-28 09:02:21,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:21,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428568837] [2020-10-28 09:02:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:21,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:22,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:22,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:26,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:26,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-28 09:02:26,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:02:26,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5193 [2020-10-28 09:02:26,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:26,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:02:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-28 09:02:26,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-28 09:02:26,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:27,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:27,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:27,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:27,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:27,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4554 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 3258 trivial. 0 not checked. [2020-10-28 09:02:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428568837] [2020-10-28 09:02:28,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:28,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:02:28,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033445958] [2020-10-28 09:02:28,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:02:28,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:28,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:02:28,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:28,004 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand 40 states. [2020-10-28 09:02:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:28,981 INFO L93 Difference]: Finished difference Result 523 states and 534 transitions. [2020-10-28 09:02:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 09:02:28,982 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 273 [2020-10-28 09:02:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:28,984 INFO L225 Difference]: With dead ends: 523 [2020-10-28 09:02:28,984 INFO L226 Difference]: Without dead ends: 288 [2020-10-28 09:02:28,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:02:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-28 09:02:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 285. [2020-10-28 09:02:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-28 09:02:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 289 transitions. [2020-10-28 09:02:28,995 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 289 transitions. Word has length 273 [2020-10-28 09:02:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:28,996 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 289 transitions. [2020-10-28 09:02:28,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:02:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 289 transitions. [2020-10-28 09:02:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-28 09:02:28,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:28,998 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:28,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 09:02:28,998 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:28,999 INFO L82 PathProgramCache]: Analyzing trace with hash -155365950, now seen corresponding path program 37 times [2020-10-28 09:02:28,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:28,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972780791] [2020-10-28 09:02:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:29,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:29,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking...