/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=SHALLOWEST --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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:17:44,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:17:44,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:17:44,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:17:44,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:17:44,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:17:44,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:17:44,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:17:44,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:17:44,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:17:44,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:17:44,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:17:44,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:17:44,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:17:44,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:17:44,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:17:44,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:17:44,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:17:44,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:17:44,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:17:44,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:17:44,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:17:44,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:17:44,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:17:44,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:17:44,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:17:44,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:17:44,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:17:44,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:17:44,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:17:44,541 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:17:44,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:17:44,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:17:44,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:17:44,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:17:44,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:17:44,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:17:44,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:17:44,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:17:44,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:17:44,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:17:44,550 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 [2020-10-26 19:17:44,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:17:44,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:17:44,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:17:44,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:17:44,582 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:17:44,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:17:44,582 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:17:44,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:17:44,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:17:44,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:17:44,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:17:44,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:17:44,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:17:44,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:17:44,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:17:44,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:17:44,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:17:44,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:17:44,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:17:44,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:17:44,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:17:44,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:17:44,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:17:44,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:17:44,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:17:44,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:17:44,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:17:44,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:17:44,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:17:44,588 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:17:44,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:17:44,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:17:44,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:17:44,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:17:44,983 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:17:44,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2020-10-26 19:17:45,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4818f96a3/7941c75983f64d3e99be70d36ecf9987/FLAG38c1dd59a [2020-10-26 19:17:45,770 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:17:45,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy6_ground-2.i [2020-10-26 19:17:45,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4818f96a3/7941c75983f64d3e99be70d36ecf9987/FLAG38c1dd59a [2020-10-26 19:17:46,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4818f96a3/7941c75983f64d3e99be70d36ecf9987 [2020-10-26 19:17:46,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:17:46,114 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:17:46,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:46,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:17:46,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:17:46,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689b59bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46, skipping insertion in model container [2020-10-26 19:17:46,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:17:46,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:17:46,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:46,394 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:17:46,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:17:46,486 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:17:46,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46 WrapperNode [2020-10-26 19:17:46,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:17:46,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:17:46,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:17:46,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:17:46,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (1/1) ... [2020-10-26 19:17:46,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:17:46,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:17:46,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:17:46,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:17:46,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (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 [2020-10-26 19:17:46,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:17:46,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:17:46,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:17:46,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:17:46,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:17:46,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:17:46,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:17:46,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:17:46,690 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:17:46,690 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:17:46,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:17:46,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:17:46,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:17:46,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:17:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:17:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:17:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:17:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:17:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:17:46,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:17:47,338 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:17:47,338 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-26 19:17:47,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:47 BoogieIcfgContainer [2020-10-26 19:17:47,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:17:47,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:17:47,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:17:47,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:17:47,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:17:46" (1/3) ... [2020-10-26 19:17:47,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6347cfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:47, skipping insertion in model container [2020-10-26 19:17:47,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:17:46" (2/3) ... [2020-10-26 19:17:47,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6347cfa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:17:47, skipping insertion in model container [2020-10-26 19:17:47,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:17:47" (3/3) ... [2020-10-26 19:17:47,349 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2020-10-26 19:17:47,362 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:17:47,367 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:17:47,383 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:17:47,414 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:17:47,414 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:17:47,414 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:17:47,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:17:47,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:17:47,415 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:17:47,415 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:17:47,415 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:17:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-26 19:17:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:47,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:47,444 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] [2020-10-26 19:17:47,445 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1163458024, now seen corresponding path program 1 times [2020-10-26 19:17:47,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:47,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353807002] [2020-10-26 19:17:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:47,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:47,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:48,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:49,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:49,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:49,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1492 [2020-10-26 19:17:49,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:17:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:17:49,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:49,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:49,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:49,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:49,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:17:49,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:49,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:49,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:17:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:49,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353807002] [2020-10-26 19:17:49,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:49,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:17:49,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056743263] [2020-10-26 19:17:49,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:17:49,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:49,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:17:49,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:17:49,341 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-26 19:17:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:49,524 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2020-10-26 19:17:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:17:49,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-26 19:17:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:49,535 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:17:49,535 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:17:49,538 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 [2020-10-26 19:17:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:17:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-26 19:17:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:17:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-10-26 19:17:49,588 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2020-10-26 19:17:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:49,588 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-10-26 19:17:49,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:17:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-10-26 19:17:49,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:17:49,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:49,590 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] [2020-10-26 19:17:49,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:17:49,591 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:49,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1189623162, now seen corresponding path program 1 times [2020-10-26 19:17:49,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:49,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995656277] [2020-10-26 19:17:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:49,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:49,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:17:52,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:52,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-26 19:17:52,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:17:52,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:52,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:17:52,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:52,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:52,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:52,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:52,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:17:52,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:17:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:52,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995656277] [2020-10-26 19:17:52,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:17:52,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:17:52,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957341914] [2020-10-26 19:17:52,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:17:52,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:52,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:17:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:17:52,644 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 4 states. [2020-10-26 19:17:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:52,844 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-26 19:17:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:17:52,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-26 19:17:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:52,846 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:17:52,847 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:17:52,848 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 [2020-10-26 19:17:52,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:17:52,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:17:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:17:52,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-26 19:17:52,868 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2020-10-26 19:17:52,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:52,868 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-26 19:17:52,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:17:52,868 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-26 19:17:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:17:52,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:52,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:52,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:17:52,870 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:52,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -627850268, now seen corresponding path program 1 times [2020-10-26 19:17:52,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:52,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379754801] [2020-10-26 19:17:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:52,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:53,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:56,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:56,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:17:56,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:17:56,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4036 [2020-10-26 19:17:56,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:17:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:17:56,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:17:56,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:57,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:17:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:57,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:17:57,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:17:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:17:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:17:57,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:17:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:17:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:17:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:17:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:17:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:17:57,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379754801] [2020-10-26 19:17:57,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:17:57,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:17:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755619644] [2020-10-26 19:17:57,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:17:57,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:17:57,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:17:57,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:17:57,037 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2020-10-26 19:17:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:17:57,294 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2020-10-26 19:17:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:17:57,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-26 19:17:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:17:57,323 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:17:57,324 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:17:57,325 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 [2020-10-26 19:17:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:17:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-26 19:17:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:17:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-26 19:17:57,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 29 [2020-10-26 19:17:57,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:17:57,344 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-26 19:17:57,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:17:57,344 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-26 19:17:57,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:17:57,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:17:57,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:17:57,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:17:57,346 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:17:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:17:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1929978430, now seen corresponding path program 2 times [2020-10-26 19:17:57,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:17:57,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381933160] [2020-10-26 19:17:57,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:17:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:17:57,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:17:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:02,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:18:02,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:02,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:18:02,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:18:02,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:02,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:18:02,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:18:02,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:02,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:02,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:02,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:02,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:02,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:02,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:02,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:02,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381933160] [2020-10-26 19:18:02,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:02,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:18:02,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37565686] [2020-10-26 19:18:02,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:18:02,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:02,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:18:02,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:18:02,464 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 6 states. [2020-10-26 19:18:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:02,662 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-26 19:18:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:18:02,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-10-26 19:18:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:02,667 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:18:02,668 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:18:02,671 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 [2020-10-26 19:18:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:18:02,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-26 19:18:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:18:02,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-26 19:18:02,681 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 31 [2020-10-26 19:18:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:02,682 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-26 19:18:02,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:18:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-26 19:18:02,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:18:02,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:02,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:02,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:18:02,684 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:02,684 INFO L82 PathProgramCache]: Analyzing trace with hash 855308320, now seen corresponding path program 3 times [2020-10-26 19:18:02,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:02,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959968627] [2020-10-26 19:18:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:02,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:02,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:07,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:07,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:18:07,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:07,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:07,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:18:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:18:07,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:07,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:07,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:07,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:07,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:07,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:07,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:07,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:07,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:07,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:07,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:07,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:07,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959968627] [2020-10-26 19:18:07,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:07,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:18:07,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074199503] [2020-10-26 19:18:07,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:18:07,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:07,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:18:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:18:07,844 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-10-26 19:18:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:08,172 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-10-26 19:18:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:18:08,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-26 19:18:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:08,174 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:18:08,174 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:18:08,175 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 [2020-10-26 19:18:08,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:18:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-26 19:18:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:18:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-26 19:18:08,181 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 33 [2020-10-26 19:18:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:08,182 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-26 19:18:08,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:18:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-26 19:18:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:18:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:08,183 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:08,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:18:08,184 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:08,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1751249662, now seen corresponding path program 4 times [2020-10-26 19:18:08,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:08,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428023994] [2020-10-26 19:18:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:08,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:08,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:08,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:08,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:13,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:18:13,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:13,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:13,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:13,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:13,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:13,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:18:13,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:13,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:13,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:13,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:13,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:13,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428023994] [2020-10-26 19:18:13,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:13,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:18:13,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201643743] [2020-10-26 19:18:13,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:18:13,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:13,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:18:13,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:18:13,349 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 8 states. [2020-10-26 19:18:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:13,581 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-10-26 19:18:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:18:13,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-26 19:18:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:13,583 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:18:13,583 INFO L226 Difference]: Without dead ends: 49 [2020-10-26 19:18:13,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:18:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-26 19:18:13,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-26 19:18:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:18:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-26 19:18:13,596 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 35 [2020-10-26 19:18:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:13,597 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-26 19:18:13,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:18:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-26 19:18:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:18:13,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:13,600 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:13,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:18:13,600 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash -537547172, now seen corresponding path program 5 times [2020-10-26 19:18:13,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:13,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536609737] [2020-10-26 19:18:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:13,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:14,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:18,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:18,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:18:18,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:18,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:18,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:18,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:18:18,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:18,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:18:18,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:18,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:18,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:18,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:18,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:18,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:18,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:18,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:18,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:18,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536609737] [2020-10-26 19:18:18,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:18,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:18:18,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100518411] [2020-10-26 19:18:18,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:18:18,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:18,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:18:18,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:18:18,768 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 9 states. [2020-10-26 19:18:18,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:18,978 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-26 19:18:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:18:18,978 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-26 19:18:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:18,982 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:18:18,982 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:18:18,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:18:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:18:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-26 19:18:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:18:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-26 19:18:18,993 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 37 [2020-10-26 19:18:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:18,993 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-26 19:18:18,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:18:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-26 19:18:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:18:18,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:18,998 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:18,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:18:18,999 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:18,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1048049094, now seen corresponding path program 6 times [2020-10-26 19:18:19,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:19,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478652710] [2020-10-26 19:18:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:19,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:19,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:19,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:19,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:19,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:19,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:24,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:18:24,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:18:24,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:18:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:18:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:24,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:24,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:24,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:24,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:24,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:24,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478652710] [2020-10-26 19:18:24,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:24,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:18:24,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777495616] [2020-10-26 19:18:24,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:18:24,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:18:24,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:18:24,212 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 10 states. [2020-10-26 19:18:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:24,513 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-26 19:18:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:18:24,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-26 19:18:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:24,516 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:18:24,516 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:18:24,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:18:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:18:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-26 19:18:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:18:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-26 19:18:24,523 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 39 [2020-10-26 19:18:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:24,524 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-26 19:18:24,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:18:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-26 19:18:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:18:24,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:24,525 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:24,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:18:24,525 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2014124392, now seen corresponding path program 7 times [2020-10-26 19:18:24,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:24,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035091064] [2020-10-26 19:18:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:24,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:24,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:29,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:29,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:18:29,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:29,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:29,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:18:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:29,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:18:29,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:29,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:29,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:29,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:29,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:29,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:29,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:29,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035091064] [2020-10-26 19:18:29,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:29,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:18:29,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788545868] [2020-10-26 19:18:29,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:18:29,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:29,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:18:29,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:18:29,766 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 11 states. [2020-10-26 19:18:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:30,081 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-10-26 19:18:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:18:30,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-26 19:18:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:30,083 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:18:30,083 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:18:30,084 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 [2020-10-26 19:18:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:18:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-26 19:18:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:18:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-26 19:18:30,094 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 41 [2020-10-26 19:18:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:30,094 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-26 19:18:30,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:18:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-26 19:18:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:18:30,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:30,095 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:30,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:18:30,096 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:30,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1595417462, now seen corresponding path program 8 times [2020-10-26 19:18:30,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:30,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847263004] [2020-10-26 19:18:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:30,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:35,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:18:35,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:35,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:18:35,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:35,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:18:35,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:35,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:18:35,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:35,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:35,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:35,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:35,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:35,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:18:35,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:35,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:35,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:35,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847263004] [2020-10-26 19:18:35,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:35,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:18:35,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599465673] [2020-10-26 19:18:35,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:18:35,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:18:35,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:18:35,354 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 12 states. [2020-10-26 19:18:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:35,654 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-26 19:18:35,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:18:35,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-26 19:18:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:35,656 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:18:35,656 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:18:35,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:18:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:18:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-26 19:18:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:18:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-26 19:18:35,664 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 43 [2020-10-26 19:18:35,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:35,664 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-26 19:18:35,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:18:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-26 19:18:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:18:35,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:35,666 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:35,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:18:35,666 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:35,667 INFO L82 PathProgramCache]: Analyzing trace with hash 31563988, now seen corresponding path program 9 times [2020-10-26 19:18:35,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:35,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183828879] [2020-10-26 19:18:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:35,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:36,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:18:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:18:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:40,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:40,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:40,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:40,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183828879] [2020-10-26 19:18:40,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:40,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:18:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992780039] [2020-10-26 19:18:40,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:18:40,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:18:40,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:40,943 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 13 states. [2020-10-26 19:18:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:41,250 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-26 19:18:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:18:41,252 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-26 19:18:41,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:41,254 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:18:41,254 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:18:41,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:18:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:18:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-26 19:18:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:18:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-26 19:18:41,268 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 45 [2020-10-26 19:18:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:41,269 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-26 19:18:41,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:18:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-26 19:18:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:18:41,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:41,271 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:41,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:18:41,272 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash 406929074, now seen corresponding path program 10 times [2020-10-26 19:18:41,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:41,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232004480] [2020-10-26 19:18:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:41,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:41,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:46,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:46,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:18:46,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:18:46,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:46,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:18:46,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:46,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:18:46,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:46,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:46,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:46,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:46,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:46,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:46,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:46,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:46,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:46,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:46,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:46,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:46,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232004480] [2020-10-26 19:18:46,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:46,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:18:46,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301439668] [2020-10-26 19:18:46,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:18:46,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:46,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:18:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:46,594 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2020-10-26 19:18:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:46,919 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-26 19:18:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:18:46,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-26 19:18:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:46,922 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:18:46,922 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:18:46,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:18:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:18:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-10-26 19:18:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:18:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2020-10-26 19:18:46,930 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 47 [2020-10-26 19:18:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:46,930 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2020-10-26 19:18:46,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:18:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2020-10-26 19:18:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:18:46,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:46,931 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:46,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:18:46,932 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:46,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash 355523856, now seen corresponding path program 11 times [2020-10-26 19:18:46,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:46,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061908934] [2020-10-26 19:18:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:46,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:46,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:47,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:51,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:51,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:18:51,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:51,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:18:51,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:18:51,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:51,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:18:51,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:52,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:52,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:52,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:52,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:52,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:52,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:18:52,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:52,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:52,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:52,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:52,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061908934] [2020-10-26 19:18:52,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:52,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:18:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742106089] [2020-10-26 19:18:52,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:18:52,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:52,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:18:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:52,294 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 15 states. [2020-10-26 19:18:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:52,633 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-10-26 19:18:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:18:52,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2020-10-26 19:18:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:52,636 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:18:52,636 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:18:52,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:18:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:18:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2020-10-26 19:18:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:18:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-26 19:18:52,643 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 49 [2020-10-26 19:18:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:52,643 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-26 19:18:52,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:18:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-26 19:18:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:18:52,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:52,644 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:52,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:18:52,645 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1800250386, now seen corresponding path program 12 times [2020-10-26 19:18:52,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:52,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518072904] [2020-10-26 19:18:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:52,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:52,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:52,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:52,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:57,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:57,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:18:57,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:18:57,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:18:57,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:57,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:18:57,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:18:57,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:18:57,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:57,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:18:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:57,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:57,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:18:57,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:18:57,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:18:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:18:57,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:18:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:18:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:18:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:18:57,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:18:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:18:57,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518072904] [2020-10-26 19:18:57,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:18:57,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:18:57,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223322573] [2020-10-26 19:18:57,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:18:57,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:18:57,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:18:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:57,990 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 16 states. [2020-10-26 19:18:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:18:58,320 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-26 19:18:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:18:58,321 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-26 19:18:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:18:58,322 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:18:58,322 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:18:58,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:18:58,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:18:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-26 19:18:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:18:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-26 19:18:58,335 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 51 [2020-10-26 19:18:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:18:58,335 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-26 19:18:58,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:18:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-26 19:18:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:18:58,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:18:58,336 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:18:58,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:18:58,337 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:18:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:18:58,337 INFO L82 PathProgramCache]: Analyzing trace with hash 969907020, now seen corresponding path program 13 times [2020-10-26 19:18:58,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:18:58,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973089963] [2020-10-26 19:18:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:18:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:18:58,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:58,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:58,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:58,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:58,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:18:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:03,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:03,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:19:03,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:19:03,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:19:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:03,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:19:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:03,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:03,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:03,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:03,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:03,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:03,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:19:03,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:03,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:03,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:03,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:03,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:19:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:03,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973089963] [2020-10-26 19:19:03,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:03,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:19:03,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506350907] [2020-10-26 19:19:03,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:19:03,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:19:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:19:03,836 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 17 states. [2020-10-26 19:19:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:04,188 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-26 19:19:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:19:04,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-26 19:19:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:04,190 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:19:04,190 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:19:04,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:19:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:19:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-26 19:19:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:19:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-26 19:19:04,208 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 53 [2020-10-26 19:19:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:04,208 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-26 19:19:04,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:19:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-26 19:19:04,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:19:04,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:04,209 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:04,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:19:04,210 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash 211450666, now seen corresponding path program 14 times [2020-10-26 19:19:04,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:04,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543071202] [2020-10-26 19:19:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:04,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:04,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:19:09,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:09,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:19:09,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:09,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:09,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:09,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:09,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:09,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:09,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:09,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:09,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:09,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:09,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:19:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543071202] [2020-10-26 19:19:09,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:09,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:19:09,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654070273] [2020-10-26 19:19:09,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:19:09,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:19:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:19:09,791 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 18 states. [2020-10-26 19:19:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:10,177 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-26 19:19:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:19:10,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-10-26 19:19:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:10,179 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:19:10,180 INFO L226 Difference]: Without dead ends: 69 [2020-10-26 19:19:10,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:19:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-26 19:19:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-26 19:19:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:19:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-26 19:19:10,193 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 55 [2020-10-26 19:19:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:10,195 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-26 19:19:10,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:19:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-26 19:19:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:19:10,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:10,196 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:10,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:19:10,196 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1479334792, now seen corresponding path program 15 times [2020-10-26 19:19:10,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:10,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330930110] [2020-10-26 19:19:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:10,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:15,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:15,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:19:15,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:19:15,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:19:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:15,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:19:15,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:15,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:15,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:15,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:15,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:15,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:15,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:15,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:15,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:15,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:15,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330930110] [2020-10-26 19:19:15,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:15,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:19:15,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526183154] [2020-10-26 19:19:15,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:19:15,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:19:15,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:19:15,793 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 19 states. [2020-10-26 19:19:16,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:16,122 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2020-10-26 19:19:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:19:16,123 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-10-26 19:19:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:16,125 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:19:16,125 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:19:16,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:19:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:19:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-26 19:19:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:19:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-26 19:19:16,134 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 57 [2020-10-26 19:19:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:16,134 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-26 19:19:16,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:19:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-26 19:19:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:19:16,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:16,141 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:16,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:19:16,142 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 145267814, now seen corresponding path program 16 times [2020-10-26 19:19:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:16,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123379618] [2020-10-26 19:19:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:16,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:16,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:16,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:21,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:19:21,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:21,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:21,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:21,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:21,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:21,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:21,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:19:21,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:21,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:21,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:21,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:21,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123379618] [2020-10-26 19:19:21,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:21,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:19:21,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588424380] [2020-10-26 19:19:21,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:19:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:21,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:19:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:19:21,665 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 20 states. [2020-10-26 19:19:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:22,054 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2020-10-26 19:19:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:19:22,054 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-26 19:19:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:22,055 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:19:22,056 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:19:22,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:19:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:19:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2020-10-26 19:19:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:19:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-26 19:19:22,062 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 59 [2020-10-26 19:19:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:22,062 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-26 19:19:22,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:19:22,062 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-26 19:19:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:19:22,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:22,063 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:22,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:19:22,063 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:22,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1992843836, now seen corresponding path program 17 times [2020-10-26 19:19:22,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:22,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775074331] [2020-10-26 19:19:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:22,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:22,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:27,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:27,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:19:27,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:27,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:19:27,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:19:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:27,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:19:27,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:27,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:27,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:27,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:27,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775074331] [2020-10-26 19:19:27,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:27,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:19:27,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479020888] [2020-10-26 19:19:27,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:19:27,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:27,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:19:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:27,626 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2020-10-26 19:19:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:28,015 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2020-10-26 19:19:28,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:19:28,016 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-10-26 19:19:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:28,017 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:19:28,017 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:19:28,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:19:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:19:28,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-10-26 19:19:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-26 19:19:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-26 19:19:28,022 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 61 [2020-10-26 19:19:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:28,023 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-26 19:19:28,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:19:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-26 19:19:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:19:28,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:28,024 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:28,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:19:28,024 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 571195298, now seen corresponding path program 18 times [2020-10-26 19:19:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173293167] [2020-10-26 19:19:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:28,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:28,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:31,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:33,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:19:33,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:33,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:19:33,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:33,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:19:33,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:33,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:19:33,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:33,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:33,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:33,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:33,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:33,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173293167] [2020-10-26 19:19:33,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:33,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:19:33,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062732383] [2020-10-26 19:19:33,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:19:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:19:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:33,638 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 22 states. [2020-10-26 19:19:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:34,009 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-26 19:19:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:19:34,010 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2020-10-26 19:19:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:34,011 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:19:34,011 INFO L226 Difference]: Without dead ends: 77 [2020-10-26 19:19:34,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:19:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-26 19:19:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-26 19:19:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-26 19:19:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2020-10-26 19:19:34,017 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 63 [2020-10-26 19:19:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:34,017 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2020-10-26 19:19:34,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:19:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2020-10-26 19:19:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:19:34,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:34,018 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:34,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:19:34,018 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash -698424832, now seen corresponding path program 19 times [2020-10-26 19:19:34,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:34,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845814281] [2020-10-26 19:19:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:34,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:34,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:37,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:39,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:19:39,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:39,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:19:39,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:19:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:39,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:19:39,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:39,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:39,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:39,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:39,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:39,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:39,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845814281] [2020-10-26 19:19:39,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:39,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:19:39,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292448684] [2020-10-26 19:19:39,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:19:39,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:19:39,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:39,714 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand 23 states. [2020-10-26 19:19:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:40,121 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2020-10-26 19:19:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:19:40,122 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2020-10-26 19:19:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:40,123 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:19:40,123 INFO L226 Difference]: Without dead ends: 79 [2020-10-26 19:19:40,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:19:40,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-26 19:19:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-26 19:19:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:19:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-26 19:19:40,130 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 65 [2020-10-26 19:19:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:40,130 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-26 19:19:40,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:19:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-26 19:19:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:19:40,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:40,131 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:40,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:19:40,132 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:40,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:40,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1032657698, now seen corresponding path program 20 times [2020-10-26 19:19:40,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:40,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549048975] [2020-10-26 19:19:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:40,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:40,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:44,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:45,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:19:45,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:45,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:19:45,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:19:45,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:45,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:19:45,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:45,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:45,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:45,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:45,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:45,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549048975] [2020-10-26 19:19:45,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:45,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:19:45,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066798365] [2020-10-26 19:19:45,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:19:45,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:19:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:45,865 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 24 states. [2020-10-26 19:19:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:46,321 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2020-10-26 19:19:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:19:46,325 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-10-26 19:19:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:46,326 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:19:46,326 INFO L226 Difference]: Without dead ends: 81 [2020-10-26 19:19:46,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:19:46,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-26 19:19:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-26 19:19:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:19:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-26 19:19:46,331 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 67 [2020-10-26 19:19:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-26 19:19:46,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:19:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-26 19:19:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:19:46,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:46,332 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:46,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:19:46,333 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash -107894724, now seen corresponding path program 21 times [2020-10-26 19:19:46,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:46,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436564155] [2020-10-26 19:19:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:46,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:46,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:46,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:46,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:47,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:50,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:51,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:19:51,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:52,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:52,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:52,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:52,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:52,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:52,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:52,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:19:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:52,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436564155] [2020-10-26 19:19:52,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:52,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:19:52,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30108653] [2020-10-26 19:19:52,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:19:52,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:19:52,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:52,133 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 25 states. [2020-10-26 19:19:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:52,509 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2020-10-26 19:19:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:19:52,510 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2020-10-26 19:19:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:52,511 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:19:52,511 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:19:52,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:19:52,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:19:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-26 19:19:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:19:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-10-26 19:19:52,517 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 69 [2020-10-26 19:19:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:52,517 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-10-26 19:19:52,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:19:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-10-26 19:19:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:19:52,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:52,518 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:52,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:19:52,518 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:52,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:52,519 INFO L82 PathProgramCache]: Analyzing trace with hash -468906982, now seen corresponding path program 22 times [2020-10-26 19:19:52,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:52,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375020727] [2020-10-26 19:19:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:52,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:52,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:54,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:55,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:57,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:57,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:19:57,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:19:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:19:57,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:19:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:19:57,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:19:57,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:58,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:19:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:19:58,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:19:58,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:19:58,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:19:58,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:19:58,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:19:58,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:19:58,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:19:58,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:19:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:19:58,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375020727] [2020-10-26 19:19:58,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:19:58,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:19:58,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658674749] [2020-10-26 19:19:58,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:19:58,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:19:58,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:19:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:58,380 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 26 states. [2020-10-26 19:19:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:19:58,692 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2020-10-26 19:19:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:19:58,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-10-26 19:19:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:19:58,694 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:19:58,695 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:19:58,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:19:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:19:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-26 19:19:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:19:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2020-10-26 19:19:58,700 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 71 [2020-10-26 19:19:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:19:58,701 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2020-10-26 19:19:58,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:19:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2020-10-26 19:19:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:19:58,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:19:58,702 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:19:58,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:19:58,702 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:19:58,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:19:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash 490664056, now seen corresponding path program 23 times [2020-10-26 19:19:58,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:19:58,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843589244] [2020-10-26 19:19:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:19:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:19:58,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:19:58,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:01,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:01,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:03,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:03,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:20:03,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:03,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:20:03,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:03,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:20:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:03,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:20:03,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:04,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:04,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:04,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:04,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:04,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:04,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:04,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:04,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:04,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:04,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843589244] [2020-10-26 19:20:04,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:04,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:20:04,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015786030] [2020-10-26 19:20:04,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:20:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:20:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:20:04,637 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 27 states. [2020-10-26 19:20:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:05,128 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-10-26 19:20:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:20:05,129 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-10-26 19:20:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:05,129 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:20:05,129 INFO L226 Difference]: Without dead ends: 87 [2020-10-26 19:20:05,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:20:05,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-26 19:20:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-10-26 19:20:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:20:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2020-10-26 19:20:05,134 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 73 [2020-10-26 19:20:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:05,135 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2020-10-26 19:20:05,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:20:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2020-10-26 19:20:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:20:05,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:05,136 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:05,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:20:05,136 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash -779537066, now seen corresponding path program 24 times [2020-10-26 19:20:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:05,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082460020] [2020-10-26 19:20:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:05,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:05,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:08,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:10,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:20:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:11,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:11,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:11,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:11,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:11,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:20:11,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:11,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:11,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:11,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:11,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082460020] [2020-10-26 19:20:11,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:11,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:20:11,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347352753] [2020-10-26 19:20:11,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:20:11,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:11,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:20:11,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:20:11,119 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 28 states. [2020-10-26 19:20:11,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:11,647 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-10-26 19:20:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:20:11,648 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2020-10-26 19:20:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:11,649 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:20:11,649 INFO L226 Difference]: Without dead ends: 89 [2020-10-26 19:20:11,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:20:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-26 19:20:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-26 19:20:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:20:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2020-10-26 19:20:11,655 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 75 [2020-10-26 19:20:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:11,655 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2020-10-26 19:20:11,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:20:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2020-10-26 19:20:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:20:11,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:11,656 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:11,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:20:11,657 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1672103244, now seen corresponding path program 25 times [2020-10-26 19:20:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:11,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239770964] [2020-10-26 19:20:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:11,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:15,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:15,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:16,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:16,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:20:16,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:16,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:20:16,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:20:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:20:16,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:17,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:17,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:17,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:17,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:17,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:17,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:17,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:17,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239770964] [2020-10-26 19:20:17,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:17,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:20:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328666877] [2020-10-26 19:20:17,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:20:17,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:17,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:20:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:20:17,697 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 29 states. [2020-10-26 19:20:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:18,216 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-10-26 19:20:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:20:18,217 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 77 [2020-10-26 19:20:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:18,218 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:20:18,218 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:20:18,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:20:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:20:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-26 19:20:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:20:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-26 19:20:18,225 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 77 [2020-10-26 19:20:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:18,225 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-26 19:20:18,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:20:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-26 19:20:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:20:18,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:18,226 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:18,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:20:18,226 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash -434741102, now seen corresponding path program 26 times [2020-10-26 19:20:18,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:18,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298260534] [2020-10-26 19:20:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:18,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:21,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:21,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:23,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:23,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:20:23,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:20:23,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:20:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:23,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:20:23,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:24,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:24,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:24,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:24,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:24,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:24,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:24,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:24,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298260534] [2020-10-26 19:20:24,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:24,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:20:24,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241883742] [2020-10-26 19:20:24,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:20:24,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:20:24,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:20:24,341 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 30 states. [2020-10-26 19:20:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:24,712 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-10-26 19:20:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:20:24,713 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 79 [2020-10-26 19:20:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:24,715 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:20:24,715 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:20:24,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:20:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:20:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-26 19:20:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:20:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-26 19:20:24,721 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 79 [2020-10-26 19:20:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:24,721 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-26 19:20:24,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:20:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-26 19:20:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:20:24,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:24,722 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:24,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:20:24,723 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1035663632, now seen corresponding path program 27 times [2020-10-26 19:20:24,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:24,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662434742] [2020-10-26 19:20:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:24,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:27,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:29,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:20:29,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:30,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:30,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:30,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:30,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:30,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:30,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:30,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:30,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:30,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662434742] [2020-10-26 19:20:30,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:30,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:20:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102490676] [2020-10-26 19:20:30,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:20:30,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:20:30,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:20:30,942 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 31 states. [2020-10-26 19:20:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:31,509 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-10-26 19:20:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:20:31,510 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-10-26 19:20:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:31,512 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:20:31,512 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:20:31,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:20:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:20:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-26 19:20:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-26 19:20:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2020-10-26 19:20:31,518 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 81 [2020-10-26 19:20:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:31,518 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2020-10-26 19:20:31,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:20:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2020-10-26 19:20:31,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:20:31,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:31,519 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:31,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:20:31,520 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1298369998, now seen corresponding path program 28 times [2020-10-26 19:20:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:31,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85331534] [2020-10-26 19:20:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:31,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:31,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:34,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:34,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:20:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:37,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:37,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:37,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:37,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:37,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:37,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:37,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:37,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85331534] [2020-10-26 19:20:37,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:37,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:20:37,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800683887] [2020-10-26 19:20:37,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:20:37,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:37,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:20:37,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:37,785 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand 32 states. [2020-10-26 19:20:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:38,144 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-10-26 19:20:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:20:38,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 83 [2020-10-26 19:20:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:38,146 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:20:38,147 INFO L226 Difference]: Without dead ends: 97 [2020-10-26 19:20:38,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:20:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-26 19:20:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2020-10-26 19:20:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:20:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-10-26 19:20:38,153 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 83 [2020-10-26 19:20:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:38,153 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-10-26 19:20:38,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:20:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-10-26 19:20:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:20:38,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:38,154 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:38,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:20:38,155 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1963207380, now seen corresponding path program 29 times [2020-10-26 19:20:38,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:38,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534805987] [2020-10-26 19:20:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:38,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:40,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:43,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:20:43,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:44,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:44,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:44,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:44,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:44,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:44,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:44,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534805987] [2020-10-26 19:20:44,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:44,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:20:44,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641802595] [2020-10-26 19:20:44,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:20:44,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:44,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:20:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:44,517 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 33 states. [2020-10-26 19:20:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:45,125 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2020-10-26 19:20:45,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:20:45,126 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 85 [2020-10-26 19:20:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:45,127 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:20:45,127 INFO L226 Difference]: Without dead ends: 99 [2020-10-26 19:20:45,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:20:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-26 19:20:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-10-26 19:20:45,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:20:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-10-26 19:20:45,133 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 85 [2020-10-26 19:20:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:45,134 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-10-26 19:20:45,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:20:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-10-26 19:20:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:20:45,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:45,135 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:45,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:20:45,135 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:45,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1012941558, now seen corresponding path program 30 times [2020-10-26 19:20:45,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:45,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942144898] [2020-10-26 19:20:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:45,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:45,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:48,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:48,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:48,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:20:50,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:51,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:51,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:51,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:51,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:51,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:51,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:20:51,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:51,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:51,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:51,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942144898] [2020-10-26 19:20:51,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:51,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:20:51,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688584449] [2020-10-26 19:20:51,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:20:51,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:51,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:20:51,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:51,581 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 34 states. [2020-10-26 19:20:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:52,181 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2020-10-26 19:20:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:20:52,182 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 87 [2020-10-26 19:20:52,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:52,184 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:20:52,184 INFO L226 Difference]: Without dead ends: 101 [2020-10-26 19:20:52,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:20:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-26 19:20:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-26 19:20:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:20:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-26 19:20:52,190 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 87 [2020-10-26 19:20:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:52,190 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-26 19:20:52,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:20:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-26 19:20:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:20:52,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:52,191 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:52,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:20:52,192 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1659446632, now seen corresponding path program 31 times [2020-10-26 19:20:52,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:52,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720480586] [2020-10-26 19:20:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:52,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:52,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:52,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:52,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:55,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:57,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:57,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:20:57,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:20:57,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:20:57,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:20:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:20:57,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:20:57,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:20:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:58,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:58,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:20:58,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:20:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:20:58,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720480586] [2020-10-26 19:20:58,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:20:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:20:58,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689133022] [2020-10-26 19:20:58,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:20:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:20:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:20:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:58,721 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 35 states. [2020-10-26 19:20:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:20:59,254 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2020-10-26 19:20:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:20:59,255 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 89 [2020-10-26 19:20:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:20:59,256 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:20:59,256 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:20:59,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:20:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:20:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:20:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:20:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-26 19:20:59,263 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 89 [2020-10-26 19:20:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:20:59,264 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-26 19:20:59,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:20:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-26 19:20:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:20:59,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:20:59,265 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:20:59,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:20:59,265 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:20:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:20:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1434054214, now seen corresponding path program 32 times [2020-10-26 19:20:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:20:59,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578425802] [2020-10-26 19:20:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:20:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:20:59,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:59,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:20:59,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:01,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:01,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:04,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:04,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:21:04,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:21:04,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-26 19:21:04,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:04,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:21:04,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:04,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:21:04,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:05,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:05,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:05,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:05,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578425802] [2020-10-26 19:21:05,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:05,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:21:05,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011562875] [2020-10-26 19:21:05,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:21:05,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:05,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:21:05,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:21:05,894 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 36 states. [2020-10-26 19:21:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:06,406 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2020-10-26 19:21:06,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:21:06,407 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 91 [2020-10-26 19:21:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:06,408 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:21:06,409 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:21:06,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:21:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:21:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-26 19:21:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-26 19:21:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-10-26 19:21:06,414 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 91 [2020-10-26 19:21:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:06,415 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-10-26 19:21:06,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:21:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-10-26 19:21:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:21:06,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:06,416 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:06,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:21:06,416 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:06,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash -419694684, now seen corresponding path program 33 times [2020-10-26 19:21:06,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:06,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079381069] [2020-10-26 19:21:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:06,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:06,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:06,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:08,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:11,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:21:11,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:13,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:13,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:13,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:13,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:13,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:13,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:13,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:13,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:13,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079381069] [2020-10-26 19:21:13,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:13,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:21:13,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744665138] [2020-10-26 19:21:13,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:21:13,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:21:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:21:13,179 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 37 states. [2020-10-26 19:21:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:13,718 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2020-10-26 19:21:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:21:13,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 93 [2020-10-26 19:21:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:13,720 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:21:13,720 INFO L226 Difference]: Without dead ends: 107 [2020-10-26 19:21:13,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:21:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-26 19:21:13,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-26 19:21:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:21:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2020-10-26 19:21:13,727 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 93 [2020-10-26 19:21:13,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:13,727 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2020-10-26 19:21:13,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:21:13,727 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2020-10-26 19:21:13,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:21:13,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:13,728 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:13,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:21:13,728 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:13,729 INFO L82 PathProgramCache]: Analyzing trace with hash 539042178, now seen corresponding path program 34 times [2020-10-26 19:21:13,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:13,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730730084] [2020-10-26 19:21:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:13,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:13,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:13,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:18,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:21:18,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:21:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:21:18,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:21:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:18,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:21:18,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:20,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:20,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:20,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:20,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:20,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:20,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730730084] [2020-10-26 19:21:20,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:20,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:21:20,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053204227] [2020-10-26 19:21:20,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:21:20,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:20,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:21:20,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:21:20,467 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand 38 states. [2020-10-26 19:21:21,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:21,080 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2020-10-26 19:21:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:21:21,081 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 95 [2020-10-26 19:21:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:21,082 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:21:21,082 INFO L226 Difference]: Without dead ends: 109 [2020-10-26 19:21:21,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:21:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-26 19:21:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-26 19:21:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:21:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2020-10-26 19:21:21,088 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 95 [2020-10-26 19:21:21,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:21,088 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2020-10-26 19:21:21,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:21:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2020-10-26 19:21:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:21:21,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:21,089 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:21,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:21:21,089 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:21,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:21,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1532802080, now seen corresponding path program 35 times [2020-10-26 19:21:21,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:21,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468330805] [2020-10-26 19:21:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:21,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:21,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:26,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:26,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:21:26,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:21:26,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:21:26,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:21:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:26,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:21:26,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:27,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:27,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:27,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:27,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:27,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:21:27,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:27,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:27,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:27,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:27,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:27,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468330805] [2020-10-26 19:21:27,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:27,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:21:27,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390643844] [2020-10-26 19:21:27,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:21:27,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:21:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:21:27,920 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand 39 states. [2020-10-26 19:21:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:28,566 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2020-10-26 19:21:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:21:28,567 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 97 [2020-10-26 19:21:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:28,568 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:21:28,568 INFO L226 Difference]: Without dead ends: 111 [2020-10-26 19:21:28,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:21:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-26 19:21:28,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-26 19:21:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-26 19:21:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2020-10-26 19:21:28,575 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 97 [2020-10-26 19:21:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:28,576 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2020-10-26 19:21:28,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:21:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2020-10-26 19:21:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:21:28,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:28,577 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:28,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:21:28,577 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:28,577 INFO L82 PathProgramCache]: Analyzing trace with hash 289691326, now seen corresponding path program 36 times [2020-10-26 19:21:28,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:28,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390362812] [2020-10-26 19:21:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:28,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:31,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:31,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:31,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:33,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:21:33,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0