/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=DEEPEST --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_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:19:09,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:19:09,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:19:09,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:19:09,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:19:09,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:19:09,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:19:09,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:19:09,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:19:09,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:19:09,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:19:09,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:19:09,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:19:09,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:19:09,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:19:09,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:19:09,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:19:09,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:19:09,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:19:09,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:19:09,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:19:09,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:19:09,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:19:09,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:19:09,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:19:09,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:19:09,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:19:09,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:19:09,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:19:09,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:19:09,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:19:09,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:19:09,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:19:09,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:19:09,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:19:09,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:19:09,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:19:09,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:19:09,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:19:09,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:19:09,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:19:09,662 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 [2020-10-27 14:19:09,694 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:19:09,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:19:09,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:19:09,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:19:09,697 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:19:09,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:19:09,697 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:19:09,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:19:09,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:19:09,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:19:09,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:19:09,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:19:09,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:19:09,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:19:09,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:19:09,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:19:09,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:19:09,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:19:09,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:19:09,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:19:09,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:19:09,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:19:09,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:19:09,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:19:09,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:19:09,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:19:09,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:19:09,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:19:09,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:19:09,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:19:10,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:19:10,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:19:10,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:19:10,109 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:19:10,110 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:19:10,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2020-10-27 14:19:10,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6686be1a/39561be7e631447983eb6beae51befca/FLAGcb1013899 [2020-10-27 14:19:10,861 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:19:10,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2020-10-27 14:19:10,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6686be1a/39561be7e631447983eb6beae51befca/FLAGcb1013899 [2020-10-27 14:19:11,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6686be1a/39561be7e631447983eb6beae51befca [2020-10-27 14:19:11,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:19:11,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:19:11,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:19:11,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:19:11,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:19:11,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e0e0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11, skipping insertion in model container [2020-10-27 14:19:11,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:19:11,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:19:11,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:19:11,467 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:19:11,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:19:11,516 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:19:11,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11 WrapperNode [2020-10-27 14:19:11,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:19:11,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:19:11,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:19:11,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:19:11,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (1/1) ... [2020-10-27 14:19:11,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:19:11,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:19:11,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:19:11,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:19:11,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (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 [2020-10-27 14:19:11,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:19:11,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:19:11,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:19:11,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:19:11,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:19:11,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:19:11,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:19:11,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:19:11,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:19:11,650 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:19:11,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:19:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:19:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:19:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:19:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:19:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:19:11,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:19:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:19:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:19:11,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:19:12,221 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:19:12,221 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-27 14:19:12,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:12 BoogieIcfgContainer [2020-10-27 14:19:12,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:19:12,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:19:12,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:19:12,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:19:12,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:19:11" (1/3) ... [2020-10-27 14:19:12,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca1d750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:12, skipping insertion in model container [2020-10-27 14:19:12,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:19:11" (2/3) ... [2020-10-27 14:19:12,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca1d750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:19:12, skipping insertion in model container [2020-10-27 14:19:12,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:19:12" (3/3) ... [2020-10-27 14:19:12,234 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2020-10-27 14:19:12,247 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:19:12,253 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:19:12,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:19:12,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:19:12,310 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:19:12,310 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:19:12,310 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:19:12,310 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:19:12,311 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:19:12,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:19:12,311 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:19:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2020-10-27 14:19:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:19:12,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:12,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:12,339 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1242794554, now seen corresponding path program 1 times [2020-10-27 14:19:12,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:12,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858155417] [2020-10-27 14:19:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:12,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:12,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:15,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:19:15,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:19:15,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3037 [2020-10-27 14:19:15,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:15,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:15,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:19:15,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:15,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:19:15,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:15,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:15,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:15,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:15,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:19:15,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:15,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:19:15,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858155417] [2020-10-27 14:19:15,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:19:15,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:19:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883880498] [2020-10-27 14:19:15,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:19:15,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:15,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:19:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:19:15,756 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 3 states. [2020-10-27 14:19:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:15,944 INFO L93 Difference]: Finished difference Result 95 states and 137 transitions. [2020-10-27 14:19:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:19:15,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-27 14:19:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:15,954 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:19:15,955 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 14:19:15,958 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 [2020-10-27 14:19:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 14:19:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 14:19:15,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:19:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-10-27 14:19:16,003 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 31 [2020-10-27 14:19:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:16,003 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-10-27 14:19:16,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:19:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-10-27 14:19:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 14:19:16,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:16,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:16,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:19:16,006 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 443594030, now seen corresponding path program 1 times [2020-10-27 14:19:16,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:16,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573783478] [2020-10-27 14:19:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:16,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:21,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 14:19:21,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:19:21,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:19:21,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:19:21,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:19:21,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:19:21,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:19:21,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:21,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:21,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:21,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:21,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:21,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:21,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:21,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:21,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:19:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573783478] [2020-10-27 14:19:21,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:19:21,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:19:21,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304377128] [2020-10-27 14:19:21,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:19:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:19:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:19:21,121 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand 4 states. [2020-10-27 14:19:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:21,351 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2020-10-27 14:19:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:19:21,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-27 14:19:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:21,353 INFO L225 Difference]: With dead ends: 95 [2020-10-27 14:19:21,353 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 14:19:21,354 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 [2020-10-27 14:19:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 14:19:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-10-27 14:19:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 14:19:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2020-10-27 14:19:21,366 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 31 [2020-10-27 14:19:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:21,366 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2020-10-27 14:19:21,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:19:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2020-10-27 14:19:21,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:19:21,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:21,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:21,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:19:21,369 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2114218722, now seen corresponding path program 1 times [2020-10-27 14:19:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531459127] [2020-10-27 14:19:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:21,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:21,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:22,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:26,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 14:19:26,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:19:26,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:19:26,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:19:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:26,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:19:26,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:26,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:26,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:26,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:26,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:26,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:19:26,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:26,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:26,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:19:26,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531459127] [2020-10-27 14:19:26,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:26,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:19:26,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940695821] [2020-10-27 14:19:26,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:19:26,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:19:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:19:26,484 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand 5 states. [2020-10-27 14:19:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:26,753 INFO L93 Difference]: Finished difference Result 118 states and 142 transitions. [2020-10-27 14:19:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:19:26,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-27 14:19:26,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:26,755 INFO L225 Difference]: With dead ends: 118 [2020-10-27 14:19:26,755 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 14:19:26,756 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 [2020-10-27 14:19:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 14:19:26,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-27 14:19:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:19:26,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-10-27 14:19:26,769 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 47 [2020-10-27 14:19:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:26,769 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-10-27 14:19:26,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:19:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-10-27 14:19:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:19:26,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:26,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:26,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:19:26,775 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash 926373134, now seen corresponding path program 2 times [2020-10-27 14:19:26,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:26,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381117822] [2020-10-27 14:19:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:26,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:26,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:31,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:19:31,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:31,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:19:31,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:31,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:19:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:31,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:19:31,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:19:31,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:31,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:31,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:31,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:31,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:31,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:31,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:19:31,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381117822] [2020-10-27 14:19:31,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:31,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:19:31,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305349457] [2020-10-27 14:19:31,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:19:31,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:31,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:19:31,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:19:31,912 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 6 states. [2020-10-27 14:19:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:32,160 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2020-10-27 14:19:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:19:32,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-27 14:19:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:32,162 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:19:32,162 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 14:19:32,163 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 [2020-10-27 14:19:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 14:19:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-10-27 14:19:32,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 14:19:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-10-27 14:19:32,180 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 63 [2020-10-27 14:19:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-10-27 14:19:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:19:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-10-27 14:19:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 14:19:32,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:32,182 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:32,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:19:32,183 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash 195294462, now seen corresponding path program 3 times [2020-10-27 14:19:32,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:32,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072467539] [2020-10-27 14:19:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:37,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 14:19:37,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:19:37,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:19:37,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:19:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:19:37,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:37,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:37,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:37,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:37,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:37,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:37,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:37,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:37,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:37,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:37,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-27 14:19:37,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072467539] [2020-10-27 14:19:37,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:37,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:19:37,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099737458] [2020-10-27 14:19:37,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:19:37,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:19:37,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:19:37,339 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 7 states. [2020-10-27 14:19:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:37,598 INFO L93 Difference]: Finished difference Result 178 states and 202 transitions. [2020-10-27 14:19:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:19:37,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-10-27 14:19:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:37,600 INFO L225 Difference]: With dead ends: 178 [2020-10-27 14:19:37,600 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 14:19:37,603 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 [2020-10-27 14:19:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 14:19:37,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-10-27 14:19:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:19:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2020-10-27 14:19:37,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 79 [2020-10-27 14:19:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:37,618 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2020-10-27 14:19:37,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:19:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2020-10-27 14:19:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 14:19:37,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:37,620 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:37,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:37,620 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash -725519122, now seen corresponding path program 4 times [2020-10-27 14:19:37,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:37,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450363118] [2020-10-27 14:19:37,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:37,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:37,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:42,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 14:19:42,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:19:42,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:42,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:42,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:42,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:42,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:42,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:42,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-27 14:19:42,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450363118] [2020-10-27 14:19:42,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:42,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:42,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681146839] [2020-10-27 14:19:42,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:42,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:42,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:42,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:42,742 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand 8 states. [2020-10-27 14:19:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:43,031 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2020-10-27 14:19:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:43,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2020-10-27 14:19:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:43,033 INFO L225 Difference]: With dead ends: 208 [2020-10-27 14:19:43,033 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:19:43,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:19:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-27 14:19:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:19:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2020-10-27 14:19:43,046 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 95 [2020-10-27 14:19:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:43,046 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2020-10-27 14:19:43,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2020-10-27 14:19:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:19:43,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:43,048 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:43,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:43,048 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1812976862, now seen corresponding path program 5 times [2020-10-27 14:19:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:43,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471403630] [2020-10-27 14:19:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:43,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:48,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:48,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:48,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:48,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:48,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:48,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:48,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:48,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-27 14:19:48,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471403630] [2020-10-27 14:19:48,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:48,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:48,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985244662] [2020-10-27 14:19:48,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:48,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:48,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:48,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:48,198 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand 9 states. [2020-10-27 14:19:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:48,531 INFO L93 Difference]: Finished difference Result 238 states and 262 transitions. [2020-10-27 14:19:48,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:48,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-10-27 14:19:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:48,533 INFO L225 Difference]: With dead ends: 238 [2020-10-27 14:19:48,533 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:19:48,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:19:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2020-10-27 14:19:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 14:19:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-10-27 14:19:48,546 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 111 [2020-10-27 14:19:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:48,550 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-10-27 14:19:48,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-10-27 14:19:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 14:19:48,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:48,553 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:48,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:48,553 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1357966130, now seen corresponding path program 6 times [2020-10-27 14:19:48,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:48,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083579439] [2020-10-27 14:19:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:48,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:53,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:53,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:53,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:53,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:53,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:53,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:53,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:53,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:53,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:53,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:53,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:53,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-27 14:19:53,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083579439] [2020-10-27 14:19:53,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:53,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:53,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570408235] [2020-10-27 14:19:53,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:53,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:53,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:53,751 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 10 states. [2020-10-27 14:19:54,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:54,208 INFO L93 Difference]: Finished difference Result 268 states and 292 transitions. [2020-10-27 14:19:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:54,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 127 [2020-10-27 14:19:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:54,210 INFO L225 Difference]: With dead ends: 268 [2020-10-27 14:19:54,210 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 14:19:54,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 14:19:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 149. [2020-10-27 14:19:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-27 14:19:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 158 transitions. [2020-10-27 14:19:54,238 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 158 transitions. Word has length 127 [2020-10-27 14:19:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:54,239 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 158 transitions. [2020-10-27 14:19:54,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 158 transitions. [2020-10-27 14:19:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-27 14:19:54,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:54,245 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:54,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:54,245 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2134848702, now seen corresponding path program 7 times [2020-10-27 14:19:54,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:54,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248905354] [2020-10-27 14:19:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:54,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:54,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:59,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:59,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:59,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:59,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:59,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:59,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-27 14:19:59,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248905354] [2020-10-27 14:19:59,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:59,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460994766] [2020-10-27 14:19:59,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:59,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:59,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:59,478 INFO L87 Difference]: Start difference. First operand 149 states and 158 transitions. Second operand 11 states. [2020-10-27 14:19:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:59,891 INFO L93 Difference]: Finished difference Result 298 states and 322 transitions. [2020-10-27 14:19:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:59,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 143 [2020-10-27 14:19:59,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:59,894 INFO L225 Difference]: With dead ends: 298 [2020-10-27 14:19:59,894 INFO L226 Difference]: Without dead ends: 173 [2020-10-27 14:19:59,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-27 14:19:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2020-10-27 14:19:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:19:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 174 transitions. [2020-10-27 14:19:59,903 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 174 transitions. Word has length 143 [2020-10-27 14:19:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:59,904 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 174 transitions. [2020-10-27 14:19:59,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 174 transitions. [2020-10-27 14:19:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:19:59,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:59,906 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:59,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:59,907 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1038076754, now seen corresponding path program 8 times [2020-10-27 14:19:59,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:59,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877248791] [2020-10-27 14:19:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:59,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:00,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:04,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:20:04,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:04,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-27 14:20:04,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:04,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:20:04,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:20:04,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:20:04,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:05,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:05,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:05,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:05,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:05,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:05,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:20:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-27 14:20:05,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877248791] [2020-10-27 14:20:05,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:05,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:20:05,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295353969] [2020-10-27 14:20:05,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:20:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:05,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:20:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:20:05,120 INFO L87 Difference]: Start difference. First operand 165 states and 174 transitions. Second operand 12 states. [2020-10-27 14:20:05,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:05,608 INFO L93 Difference]: Finished difference Result 328 states and 352 transitions. [2020-10-27 14:20:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:20:05,608 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 159 [2020-10-27 14:20:05,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:05,610 INFO L225 Difference]: With dead ends: 328 [2020-10-27 14:20:05,610 INFO L226 Difference]: Without dead ends: 189 [2020-10-27 14:20:05,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:20:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-27 14:20:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 181. [2020-10-27 14:20:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-27 14:20:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 190 transitions. [2020-10-27 14:20:05,620 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 190 transitions. Word has length 159 [2020-10-27 14:20:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:05,620 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 190 transitions. [2020-10-27 14:20:05,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:20:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 190 transitions. [2020-10-27 14:20:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-27 14:20:05,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:05,623 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:05,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:20:05,623 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:05,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1630672030, now seen corresponding path program 9 times [2020-10-27 14:20:05,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:05,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377474352] [2020-10-27 14:20:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:05,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:05,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:06,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:10,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 14:20:10,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:10,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:20:10,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:10,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:20:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:20:10,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:20:10,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:10,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:10,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:10,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:10,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:10,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:10,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:10,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-10-27 14:20:10,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377474352] [2020-10-27 14:20:10,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:10,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:20:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196053548] [2020-10-27 14:20:10,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:20:10,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:20:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:20:10,826 INFO L87 Difference]: Start difference. First operand 181 states and 190 transitions. Second operand 13 states. [2020-10-27 14:20:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:11,313 INFO L93 Difference]: Finished difference Result 358 states and 382 transitions. [2020-10-27 14:20:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:20:11,314 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 175 [2020-10-27 14:20:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:11,316 INFO L225 Difference]: With dead ends: 358 [2020-10-27 14:20:11,316 INFO L226 Difference]: Without dead ends: 205 [2020-10-27 14:20:11,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:20:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-27 14:20:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2020-10-27 14:20:11,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-27 14:20:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 206 transitions. [2020-10-27 14:20:11,327 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 206 transitions. Word has length 175 [2020-10-27 14:20:11,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:11,327 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 206 transitions. [2020-10-27 14:20:11,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:20:11,327 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 206 transitions. [2020-10-27 14:20:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-27 14:20:11,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:11,330 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:11,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:20:11,330 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1240781966, now seen corresponding path program 10 times [2020-10-27 14:20:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:11,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180482465] [2020-10-27 14:20:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:11,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:16,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 14:20:16,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:16,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 14:20:16,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:16,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:20:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-27 14:20:16,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:20:16,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:16,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:16,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:16,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-27 14:20:16,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180482465] [2020-10-27 14:20:16,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:16,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:20:16,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360816152] [2020-10-27 14:20:16,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:20:16,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:16,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:20:16,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:20:16,636 INFO L87 Difference]: Start difference. First operand 197 states and 206 transitions. Second operand 14 states. [2020-10-27 14:20:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:17,189 INFO L93 Difference]: Finished difference Result 388 states and 412 transitions. [2020-10-27 14:20:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:20:17,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 191 [2020-10-27 14:20:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:17,192 INFO L225 Difference]: With dead ends: 388 [2020-10-27 14:20:17,193 INFO L226 Difference]: Without dead ends: 221 [2020-10-27 14:20:17,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:20:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-27 14:20:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2020-10-27 14:20:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:20:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 222 transitions. [2020-10-27 14:20:17,202 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 222 transitions. Word has length 191 [2020-10-27 14:20:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:17,203 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 222 transitions. [2020-10-27 14:20:17,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:20:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 222 transitions. [2020-10-27 14:20:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 14:20:17,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:17,206 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:17,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:20:17,206 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1843950718, now seen corresponding path program 11 times [2020-10-27 14:20:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:17,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860421715] [2020-10-27 14:20:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:17,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:17,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:19,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:22,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 109 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:20:22,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:22,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:22,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:22,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:22,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:22,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-27 14:20:22,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860421715] [2020-10-27 14:20:22,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:22,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:20:22,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848990839] [2020-10-27 14:20:22,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:20:22,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:22,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:20:22,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:20:22,573 INFO L87 Difference]: Start difference. First operand 213 states and 222 transitions. Second operand 15 states. [2020-10-27 14:20:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:23,196 INFO L93 Difference]: Finished difference Result 418 states and 442 transitions. [2020-10-27 14:20:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:20:23,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 207 [2020-10-27 14:20:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:23,199 INFO L225 Difference]: With dead ends: 418 [2020-10-27 14:20:23,199 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 14:20:23,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:20:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 14:20:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2020-10-27 14:20:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 14:20:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 238 transitions. [2020-10-27 14:20:23,209 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 238 transitions. Word has length 207 [2020-10-27 14:20:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:23,210 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 238 transitions. [2020-10-27 14:20:23,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:20:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 238 transitions. [2020-10-27 14:20:23,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 14:20:23,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:23,213 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:23,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:20:23,214 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1030949778, now seen corresponding path program 12 times [2020-10-27 14:20:23,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:23,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316326318] [2020-10-27 14:20:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:23,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:23,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:28,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5174 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:20:28,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:28,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:28,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:28,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:28,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-10-27 14:20:28,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316326318] [2020-10-27 14:20:28,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:28,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:20:28,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800978536] [2020-10-27 14:20:28,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:20:28,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:20:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:28,625 INFO L87 Difference]: Start difference. First operand 229 states and 238 transitions. Second operand 16 states. [2020-10-27 14:20:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:29,314 INFO L93 Difference]: Finished difference Result 448 states and 472 transitions. [2020-10-27 14:20:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:20:29,314 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 223 [2020-10-27 14:20:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:29,317 INFO L225 Difference]: With dead ends: 448 [2020-10-27 14:20:29,317 INFO L226 Difference]: Without dead ends: 253 [2020-10-27 14:20:29,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:20:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-27 14:20:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2020-10-27 14:20:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-27 14:20:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 254 transitions. [2020-10-27 14:20:29,329 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 254 transitions. Word has length 223 [2020-10-27 14:20:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:29,330 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 254 transitions. [2020-10-27 14:20:29,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:20:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 254 transitions. [2020-10-27 14:20:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 14:20:29,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:29,333 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:29,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:20:29,334 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:29,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1096963166, now seen corresponding path program 13 times [2020-10-27 14:20:29,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:29,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735992693] [2020-10-27 14:20:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:29,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5292 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:20:34,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:34,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:34,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:34,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2020-10-27 14:20:34,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735992693] [2020-10-27 14:20:34,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:34,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:20:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002013129] [2020-10-27 14:20:34,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:20:34,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:20:34,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:34,899 INFO L87 Difference]: Start difference. First operand 245 states and 254 transitions. Second operand 17 states. [2020-10-27 14:20:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:35,613 INFO L93 Difference]: Finished difference Result 478 states and 502 transitions. [2020-10-27 14:20:35,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:20:35,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 239 [2020-10-27 14:20:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:35,616 INFO L225 Difference]: With dead ends: 478 [2020-10-27 14:20:35,616 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 14:20:35,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:20:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 14:20:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 261. [2020-10-27 14:20:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-27 14:20:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 270 transitions. [2020-10-27 14:20:35,631 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 270 transitions. Word has length 239 [2020-10-27 14:20:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:35,631 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 270 transitions. [2020-10-27 14:20:35,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:20:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 270 transitions. [2020-10-27 14:20:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-27 14:20:35,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:35,633 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:35,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:20:35,633 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash -404188082, now seen corresponding path program 14 times [2020-10-27 14:20:35,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:35,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282022568] [2020-10-27 14:20:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:35,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5429 [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:20:41,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:20:41,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:20:41,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:41,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:41,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:41,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:41,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:41,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2020-10-27 14:20:41,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282022568] [2020-10-27 14:20:41,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:41,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:20:41,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509670957] [2020-10-27 14:20:41,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:20:41,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:20:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:41,368 INFO L87 Difference]: Start difference. First operand 261 states and 270 transitions. Second operand 18 states. [2020-10-27 14:20:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:42,092 INFO L93 Difference]: Finished difference Result 508 states and 532 transitions. [2020-10-27 14:20:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:20:42,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 255 [2020-10-27 14:20:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:42,094 INFO L225 Difference]: With dead ends: 508 [2020-10-27 14:20:42,095 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 14:20:42,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:20:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 14:20:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2020-10-27 14:20:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-27 14:20:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2020-10-27 14:20:42,107 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 255 [2020-10-27 14:20:42,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:42,108 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2020-10-27 14:20:42,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:20:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2020-10-27 14:20:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-27 14:20:42,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:42,110 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:42,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:42,110 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:42,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1214270402, now seen corresponding path program 15 times [2020-10-27 14:20:42,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:42,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277355035] [2020-10-27 14:20:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:42,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:47,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 14:20:47,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:47,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-27 14:20:47,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 141 [2020-10-27 14:20:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:47,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:47,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-27 14:20:47,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277355035] [2020-10-27 14:20:47,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:47,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:47,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164121570] [2020-10-27 14:20:47,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:47,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:47,547 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 19 states. [2020-10-27 14:20:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:48,323 INFO L93 Difference]: Finished difference Result 538 states and 562 transitions. [2020-10-27 14:20:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:48,324 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 271 [2020-10-27 14:20:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:48,326 INFO L225 Difference]: With dead ends: 538 [2020-10-27 14:20:48,326 INFO L226 Difference]: Without dead ends: 301 [2020-10-27 14:20:48,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-27 14:20:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2020-10-27 14:20:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-27 14:20:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 302 transitions. [2020-10-27 14:20:48,344 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 302 transitions. Word has length 271 [2020-10-27 14:20:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:48,345 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 302 transitions. [2020-10-27 14:20:48,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 302 transitions. [2020-10-27 14:20:48,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-27 14:20:48,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:48,347 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:48,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:48,348 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1241009106, now seen corresponding path program 16 times [2020-10-27 14:20:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:48,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641508975] [2020-10-27 14:20:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:48,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:48,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:53,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:53,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2020-10-27 14:20:53,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641508975] [2020-10-27 14:20:53,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:53,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:53,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876629217] [2020-10-27 14:20:53,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:53,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:53,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:53,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:53,769 INFO L87 Difference]: Start difference. First operand 293 states and 302 transitions. Second operand 20 states. [2020-10-27 14:20:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:54,546 INFO L93 Difference]: Finished difference Result 568 states and 592 transitions. [2020-10-27 14:20:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:54,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 287 [2020-10-27 14:20:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:54,550 INFO L225 Difference]: With dead ends: 568 [2020-10-27 14:20:54,550 INFO L226 Difference]: Without dead ends: 317 [2020-10-27 14:20:54,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-27 14:20:54,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 309. [2020-10-27 14:20:54,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-10-27 14:20:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 318 transitions. [2020-10-27 14:20:54,564 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 318 transitions. Word has length 287 [2020-10-27 14:20:54,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:54,564 INFO L481 AbstractCegarLoop]: Abstraction has 309 states and 318 transitions. [2020-10-27 14:20:54,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:54,564 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 318 transitions. [2020-10-27 14:20:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-27 14:20:54,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:54,566 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:54,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:54,567 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash -325020642, now seen corresponding path program 17 times [2020-10-27 14:20:54,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:54,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087189079] [2020-10-27 14:20:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:54,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:54,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:59,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:59,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:59,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:59,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:59,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:20:59,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:59,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2020-10-27 14:20:59,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087189079] [2020-10-27 14:20:59,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:59,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:59,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740043096] [2020-10-27 14:20:59,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:59,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:59,984 INFO L87 Difference]: Start difference. First operand 309 states and 318 transitions. Second operand 21 states. [2020-10-27 14:21:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:00,863 INFO L93 Difference]: Finished difference Result 598 states and 622 transitions. [2020-10-27 14:21:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:21:00,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 303 [2020-10-27 14:21:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:00,866 INFO L225 Difference]: With dead ends: 598 [2020-10-27 14:21:00,866 INFO L226 Difference]: Without dead ends: 333 [2020-10-27 14:21:00,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:21:00,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-27 14:21:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 325. [2020-10-27 14:21:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-27 14:21:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 334 transitions. [2020-10-27 14:21:00,889 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 334 transitions. Word has length 303 [2020-10-27 14:21:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:00,891 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 334 transitions. [2020-10-27 14:21:00,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:21:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 334 transitions. [2020-10-27 14:21:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-27 14:21:00,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:00,893 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:00,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:21:00,894 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:00,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1760187406, now seen corresponding path program 18 times [2020-10-27 14:21:00,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:00,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012100428] [2020-10-27 14:21:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:01,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6271 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:21:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:07,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:07,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:07,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:07,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:07,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:21:07,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:07,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:07,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-27 14:21:07,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012100428] [2020-10-27 14:21:07,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:07,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:21:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420615159] [2020-10-27 14:21:07,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:21:07,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:21:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:21:07,596 INFO L87 Difference]: Start difference. First operand 325 states and 334 transitions. Second operand 22 states. [2020-10-27 14:21:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:08,518 INFO L93 Difference]: Finished difference Result 628 states and 652 transitions. [2020-10-27 14:21:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:21:08,519 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 319 [2020-10-27 14:21:08,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:08,521 INFO L225 Difference]: With dead ends: 628 [2020-10-27 14:21:08,521 INFO L226 Difference]: Without dead ends: 349 [2020-10-27 14:21:08,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:21:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-27 14:21:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 341. [2020-10-27 14:21:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-27 14:21:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 350 transitions. [2020-10-27 14:21:08,535 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 350 transitions. Word has length 319 [2020-10-27 14:21:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:08,536 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 350 transitions. [2020-10-27 14:21:08,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:21:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 350 transitions. [2020-10-27 14:21:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-27 14:21:08,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:08,538 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:08,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:21:08,539 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:08,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1013249022, now seen corresponding path program 19 times [2020-10-27 14:21:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:08,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311207479] [2020-10-27 14:21:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:08,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:08,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:13,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:13,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-27 14:21:13,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:13,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-27 14:21:13,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:13,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:21:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:21:13,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:21:13,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:14,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:14,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:14,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:14,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:14,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:14,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:14,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:14,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2527 trivial. 0 not checked. [2020-10-27 14:21:14,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311207479] [2020-10-27 14:21:14,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:14,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:21:14,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960565909] [2020-10-27 14:21:14,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:21:14,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:14,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:21:14,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:21:14,196 INFO L87 Difference]: Start difference. First operand 341 states and 350 transitions. Second operand 23 states. [2020-10-27 14:21:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:15,116 INFO L93 Difference]: Finished difference Result 658 states and 682 transitions. [2020-10-27 14:21:15,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:21:15,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 335 [2020-10-27 14:21:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:15,119 INFO L225 Difference]: With dead ends: 658 [2020-10-27 14:21:15,119 INFO L226 Difference]: Without dead ends: 365 [2020-10-27 14:21:15,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:21:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-27 14:21:15,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 357. [2020-10-27 14:21:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-27 14:21:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 366 transitions. [2020-10-27 14:21:15,133 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 366 transitions. Word has length 335 [2020-10-27 14:21:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:15,133 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 366 transitions. [2020-10-27 14:21:15,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:21:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 366 transitions. [2020-10-27 14:21:15,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-27 14:21:15,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:15,136 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:15,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:21:15,137 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash 2089841646, now seen corresponding path program 20 times [2020-10-27 14:21:15,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:15,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730952849] [2020-10-27 14:21:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:15,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:15,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6230 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:21:21,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:21,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:21,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:21,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:21,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:21,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:21,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:21:21,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:21,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:21,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2020-10-27 14:21:21,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730952849] [2020-10-27 14:21:21,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:21,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:21:21,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598631745] [2020-10-27 14:21:21,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:21:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:21:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:21,956 INFO L87 Difference]: Start difference. First operand 357 states and 366 transitions. Second operand 24 states. [2020-10-27 14:21:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:22,953 INFO L93 Difference]: Finished difference Result 688 states and 712 transitions. [2020-10-27 14:21:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:21:22,954 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 351 [2020-10-27 14:21:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:22,956 INFO L225 Difference]: With dead ends: 688 [2020-10-27 14:21:22,956 INFO L226 Difference]: Without dead ends: 381 [2020-10-27 14:21:22,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:21:22,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-10-27 14:21:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 373. [2020-10-27 14:21:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-27 14:21:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 382 transitions. [2020-10-27 14:21:22,971 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 382 transitions. Word has length 351 [2020-10-27 14:21:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:22,972 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 382 transitions. [2020-10-27 14:21:22,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:21:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 382 transitions. [2020-10-27 14:21:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-27 14:21:22,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:22,975 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:22,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:21:22,975 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1122816990, now seen corresponding path program 21 times [2020-10-27 14:21:22,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:22,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355762468] [2020-10-27 14:21:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:23,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5283 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 145 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:21:28,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:28,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:28,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:28,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:28,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2020-10-27 14:21:28,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355762468] [2020-10-27 14:21:28,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:28,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:21:28,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302039003] [2020-10-27 14:21:28,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:21:28,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:21:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:28,796 INFO L87 Difference]: Start difference. First operand 373 states and 382 transitions. Second operand 25 states. [2020-10-27 14:21:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:29,784 INFO L93 Difference]: Finished difference Result 718 states and 742 transitions. [2020-10-27 14:21:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:21:29,784 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 367 [2020-10-27 14:21:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:29,787 INFO L225 Difference]: With dead ends: 718 [2020-10-27 14:21:29,787 INFO L226 Difference]: Without dead ends: 397 [2020-10-27 14:21:29,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:21:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-27 14:21:29,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 389. [2020-10-27 14:21:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2020-10-27 14:21:29,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 398 transitions. [2020-10-27 14:21:29,804 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 398 transitions. Word has length 367 [2020-10-27 14:21:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:29,804 INFO L481 AbstractCegarLoop]: Abstraction has 389 states and 398 transitions. [2020-10-27 14:21:29,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:21:29,804 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 398 transitions. [2020-10-27 14:21:29,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-10-27 14:21:29,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:29,807 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:29,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:21:29,808 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1392897074, now seen corresponding path program 22 times [2020-10-27 14:21:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:29,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154041988] [2020-10-27 14:21:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:29,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:36,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 393 [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6281 [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-27 14:21:36,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:21:36,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:36,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:36,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-10-27 14:21:36,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154041988] [2020-10-27 14:21:36,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:36,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:21:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282603523] [2020-10-27 14:21:36,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:21:36,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:36,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:21:36,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:36,612 INFO L87 Difference]: Start difference. First operand 389 states and 398 transitions. Second operand 26 states. [2020-10-27 14:21:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:37,708 INFO L93 Difference]: Finished difference Result 748 states and 772 transitions. [2020-10-27 14:21:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:21:37,709 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 383 [2020-10-27 14:21:37,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:37,712 INFO L225 Difference]: With dead ends: 748 [2020-10-27 14:21:37,712 INFO L226 Difference]: Without dead ends: 413 [2020-10-27 14:21:37,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:21:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-27 14:21:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 405. [2020-10-27 14:21:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-27 14:21:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 414 transitions. [2020-10-27 14:21:37,729 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 414 transitions. Word has length 383 [2020-10-27 14:21:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:37,729 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 414 transitions. [2020-10-27 14:21:37,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:21:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 414 transitions. [2020-10-27 14:21:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2020-10-27 14:21:37,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:37,732 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:37,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:21:37,734 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash -600296514, now seen corresponding path program 23 times [2020-10-27 14:21:37,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:37,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153332937] [2020-10-27 14:21:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:38,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:38,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 409 [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 157 [2020-10-27 14:21:42,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:21:42,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-27 14:21:43,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:43,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:43,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:43,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:43,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:43,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:43,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:43,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:43,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:43,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3703 trivial. 0 not checked. [2020-10-27 14:21:43,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153332937] [2020-10-27 14:21:43,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:43,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:21:43,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386534685] [2020-10-27 14:21:43,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:21:43,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:43,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:21:43,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:43,307 INFO L87 Difference]: Start difference. First operand 405 states and 414 transitions. Second operand 27 states. [2020-10-27 14:21:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:44,417 INFO L93 Difference]: Finished difference Result 778 states and 802 transitions. [2020-10-27 14:21:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:21:44,418 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 399 [2020-10-27 14:21:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:44,421 INFO L225 Difference]: With dead ends: 778 [2020-10-27 14:21:44,421 INFO L226 Difference]: Without dead ends: 429 [2020-10-27 14:21:44,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:21:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-10-27 14:21:44,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 421. [2020-10-27 14:21:44,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-27 14:21:44,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 430 transitions. [2020-10-27 14:21:44,436 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 430 transitions. Word has length 399 [2020-10-27 14:21:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:44,436 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 430 transitions. [2020-10-27 14:21:44,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:21:44,437 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 430 transitions. [2020-10-27 14:21:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2020-10-27 14:21:44,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:44,440 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:44,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:21:44,440 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:44,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:44,441 INFO L82 PathProgramCache]: Analyzing trace with hash -165203026, now seen corresponding path program 24 times [2020-10-27 14:21:44,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:44,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078903689] [2020-10-27 14:21:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:44,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:49,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 425 [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 213 [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:21:49,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:49,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:49,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:49,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2020-10-27 14:21:50,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078903689] [2020-10-27 14:21:50,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:50,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:21:50,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368727482] [2020-10-27 14:21:50,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:21:50,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:21:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:50,095 INFO L87 Difference]: Start difference. First operand 421 states and 430 transitions. Second operand 28 states. [2020-10-27 14:21:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:51,266 INFO L93 Difference]: Finished difference Result 808 states and 832 transitions. [2020-10-27 14:21:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:21:51,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 415 [2020-10-27 14:21:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:51,268 INFO L225 Difference]: With dead ends: 808 [2020-10-27 14:21:51,269 INFO L226 Difference]: Without dead ends: 445 [2020-10-27 14:21:51,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:21:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-27 14:21:51,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 437. [2020-10-27 14:21:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-27 14:21:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 446 transitions. [2020-10-27 14:21:51,283 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 446 transitions. Word has length 415 [2020-10-27 14:21:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:51,283 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 446 transitions. [2020-10-27 14:21:51,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:21:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 446 transitions. [2020-10-27 14:21:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-10-27 14:21:51,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:51,287 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:51,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:51,287 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash 608637854, now seen corresponding path program 25 times [2020-10-27 14:21:51,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:51,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518958979] [2020-10-27 14:21:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:51,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:57,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:57,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 441 [2020-10-27 14:21:57,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:21:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6092 [2020-10-27 14:21:57,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-27 14:21:57,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:57,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:57,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:57,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:57,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:57,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:57,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:57,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:21:57,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:57,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:57,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4375 trivial. 0 not checked. [2020-10-27 14:21:58,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518958979] [2020-10-27 14:21:58,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:58,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928204237] [2020-10-27 14:21:58,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:58,034 INFO L87 Difference]: Start difference. First operand 437 states and 446 transitions. Second operand 29 states. [2020-10-27 14:21:59,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:59,277 INFO L93 Difference]: Finished difference Result 838 states and 862 transitions. [2020-10-27 14:21:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:59,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 431 [2020-10-27 14:21:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:59,280 INFO L225 Difference]: With dead ends: 838 [2020-10-27 14:21:59,280 INFO L226 Difference]: Without dead ends: 461 [2020-10-27 14:21:59,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-27 14:21:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2020-10-27 14:21:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-27 14:21:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 462 transitions. [2020-10-27 14:21:59,296 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 462 transitions. Word has length 431 [2020-10-27 14:21:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:59,296 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 462 transitions. [2020-10-27 14:21:59,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 462 transitions. [2020-10-27 14:21:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-27 14:21:59,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:59,300 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:59,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:21:59,300 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377842, now seen corresponding path program 26 times [2020-10-27 14:21:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:59,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736941584] [2020-10-27 14:21:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:59,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:05,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:05,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 457 [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5833 [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:22:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:05,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:05,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:05,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:05,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:05,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:22:05,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:05,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:05,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:05,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:05,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2020-10-27 14:22:05,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736941584] [2020-10-27 14:22:05,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:05,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:22:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511703643] [2020-10-27 14:22:05,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:22:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:22:05,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:22:05,880 INFO L87 Difference]: Start difference. First operand 453 states and 462 transitions. Second operand 30 states. [2020-10-27 14:22:07,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:07,002 INFO L93 Difference]: Finished difference Result 868 states and 892 transitions. [2020-10-27 14:22:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:22:07,002 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 447 [2020-10-27 14:22:07,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:07,006 INFO L225 Difference]: With dead ends: 868 [2020-10-27 14:22:07,006 INFO L226 Difference]: Without dead ends: 477 [2020-10-27 14:22:07,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:22:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-27 14:22:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 469. [2020-10-27 14:22:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 14:22:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 478 transitions. [2020-10-27 14:22:07,020 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 478 transitions. Word has length 447 [2020-10-27 14:22:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:07,021 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 478 transitions. [2020-10-27 14:22:07,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:22:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 478 transitions. [2020-10-27 14:22:07,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-10-27 14:22:07,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:07,024 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:07,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:22:07,025 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1998156670, now seen corresponding path program 27 times [2020-10-27 14:22:07,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:07,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362606423] [2020-10-27 14:22:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:07,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:12,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 473 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5620 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 237 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:22:12,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:13,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:13,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:13,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:13,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5103 trivial. 0 not checked. [2020-10-27 14:22:13,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362606423] [2020-10-27 14:22:13,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:13,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:22:13,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19478275] [2020-10-27 14:22:13,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:22:13,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:13,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:22:13,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:22:13,365 INFO L87 Difference]: Start difference. First operand 469 states and 478 transitions. Second operand 31 states. [2020-10-27 14:22:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:14,754 INFO L93 Difference]: Finished difference Result 898 states and 922 transitions. [2020-10-27 14:22:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:22:14,759 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 463 [2020-10-27 14:22:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:14,761 INFO L225 Difference]: With dead ends: 898 [2020-10-27 14:22:14,761 INFO L226 Difference]: Without dead ends: 493 [2020-10-27 14:22:14,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:22:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2020-10-27 14:22:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 485. [2020-10-27 14:22:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-27 14:22:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 494 transitions. [2020-10-27 14:22:14,776 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 494 transitions. Word has length 463 [2020-10-27 14:22:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:14,776 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 494 transitions. [2020-10-27 14:22:14,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:22:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 494 transitions. [2020-10-27 14:22:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-10-27 14:22:14,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:14,780 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:14,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:22:14,780 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:14,781 INFO L82 PathProgramCache]: Analyzing trace with hash 46920558, now seen corresponding path program 28 times [2020-10-27 14:22:14,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:14,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584788201] [2020-10-27 14:22:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:14,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:14,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:14,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:15,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 489 [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:22:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-27 14:22:19,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:22:19,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:20,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:20,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:20,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:20,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:20,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5488 trivial. 0 not checked. [2020-10-27 14:22:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584788201] [2020-10-27 14:22:20,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:20,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:22:20,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100072232] [2020-10-27 14:22:20,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:22:20,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:22:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:20,607 INFO L87 Difference]: Start difference. First operand 485 states and 494 transitions. Second operand 32 states. [2020-10-27 14:22:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:22,046 INFO L93 Difference]: Finished difference Result 928 states and 952 transitions. [2020-10-27 14:22:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:22:22,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 479 [2020-10-27 14:22:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:22,051 INFO L225 Difference]: With dead ends: 928 [2020-10-27 14:22:22,051 INFO L226 Difference]: Without dead ends: 509 [2020-10-27 14:22:22,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:22:22,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2020-10-27 14:22:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 501. [2020-10-27 14:22:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-10-27 14:22:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 510 transitions. [2020-10-27 14:22:22,066 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 510 transitions. Word has length 479 [2020-10-27 14:22:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:22,066 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 510 transitions. [2020-10-27 14:22:22,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:22:22,066 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 510 transitions. [2020-10-27 14:22:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-10-27 14:22:22,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:22,070 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:22,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:22:22,071 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:22,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1890538334, now seen corresponding path program 29 times [2020-10-27 14:22:22,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:22,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789169050] [2020-10-27 14:22:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:22,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:22,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 505 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7460 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:22:29,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:30,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:30,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:30,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:30,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:30,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:30,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:30,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:30,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:30,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:30,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:30,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5887 trivial. 0 not checked. [2020-10-27 14:22:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789169050] [2020-10-27 14:22:30,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:30,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:22:30,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671442044] [2020-10-27 14:22:30,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:22:30,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:22:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:30,325 INFO L87 Difference]: Start difference. First operand 501 states and 510 transitions. Second operand 33 states. [2020-10-27 14:22:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:31,824 INFO L93 Difference]: Finished difference Result 958 states and 982 transitions. [2020-10-27 14:22:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:22:31,824 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 495 [2020-10-27 14:22:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:31,827 INFO L225 Difference]: With dead ends: 958 [2020-10-27 14:22:31,827 INFO L226 Difference]: Without dead ends: 525 [2020-10-27 14:22:31,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:22:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2020-10-27 14:22:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 517. [2020-10-27 14:22:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-10-27 14:22:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 526 transitions. [2020-10-27 14:22:31,842 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 526 transitions. Word has length 495 [2020-10-27 14:22:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:31,842 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 526 transitions. [2020-10-27 14:22:31,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:22:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 526 transitions. [2020-10-27 14:22:31,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-10-27 14:22:31,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:31,847 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:31,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:22:31,847 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash -29125810, now seen corresponding path program 30 times [2020-10-27 14:22:31,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:31,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996509619] [2020-10-27 14:22:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:31,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:32,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:37,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:37,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 521 [2020-10-27 14:22:37,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:37,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5864 [2020-10-27 14:22:37,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:37,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:22:37,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-27 14:22:37,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:22:37,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:38,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:38,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:38,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:38,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:38,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:22:38,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:38,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:38,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:38,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6300 trivial. 0 not checked. [2020-10-27 14:22:38,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996509619] [2020-10-27 14:22:38,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:38,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:22:38,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422273584] [2020-10-27 14:22:38,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:22:38,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:22:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:22:38,650 INFO L87 Difference]: Start difference. First operand 517 states and 526 transitions. Second operand 34 states. [2020-10-27 14:22:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:40,286 INFO L93 Difference]: Finished difference Result 988 states and 1012 transitions. [2020-10-27 14:22:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:22:40,292 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 511 [2020-10-27 14:22:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:40,296 INFO L225 Difference]: With dead ends: 988 [2020-10-27 14:22:40,296 INFO L226 Difference]: Without dead ends: 541 [2020-10-27 14:22:40,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:22:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-27 14:22:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 533. [2020-10-27 14:22:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-27 14:22:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 542 transitions. [2020-10-27 14:22:40,312 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 542 transitions. Word has length 511 [2020-10-27 14:22:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:40,312 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 542 transitions. [2020-10-27 14:22:40,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:22:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 542 transitions. [2020-10-27 14:22:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-10-27 14:22:40,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:40,316 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:40,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:22:40,317 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -318196930, now seen corresponding path program 31 times [2020-10-27 14:22:40,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:40,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771080411] [2020-10-27 14:22:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:40,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:40,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:40,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:40,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:40,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 537 [2020-10-27 14:22:46,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:22:46,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5662 [2020-10-27 14:22:46,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:22:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-27 14:22:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:22:46,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:46,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:46,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:46,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:46,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:46,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:46,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:46,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:46,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 6727 trivial. 0 not checked. [2020-10-27 14:22:46,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771080411] [2020-10-27 14:22:46,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:46,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:22:46,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048465997] [2020-10-27 14:22:46,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:22:46,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:22:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:22:46,939 INFO L87 Difference]: Start difference. First operand 533 states and 542 transitions. Second operand 35 states. [2020-10-27 14:22:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:48,613 INFO L93 Difference]: Finished difference Result 1018 states and 1042 transitions. [2020-10-27 14:22:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:22:48,613 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 527 [2020-10-27 14:22:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:48,617 INFO L225 Difference]: With dead ends: 1018 [2020-10-27 14:22:48,617 INFO L226 Difference]: Without dead ends: 557 [2020-10-27 14:22:48,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:22:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-10-27 14:22:48,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 549. [2020-10-27 14:22:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 549 states. [2020-10-27 14:22:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 558 transitions. [2020-10-27 14:22:48,633 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 558 transitions. Word has length 527 [2020-10-27 14:22:48,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:48,634 INFO L481 AbstractCegarLoop]: Abstraction has 549 states and 558 transitions. [2020-10-27 14:22:48,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:22:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 558 transitions. [2020-10-27 14:22:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2020-10-27 14:22:48,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:48,638 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:48,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:22:48,639 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:48,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2105625810, now seen corresponding path program 32 times [2020-10-27 14:22:48,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:48,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885037764] [2020-10-27 14:22:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:48,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:48,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:48,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking...