/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:18,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:18,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:18,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:18,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:18,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:18,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:18,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:18,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:18,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:18,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:18,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:18,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:18,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:18,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:18,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:18,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:18,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:18,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:18,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:18,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:18,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:18,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:18,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:18,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:18,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:18,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:18,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:18,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:18,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:18,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:18,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:18,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:18,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:18,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:18,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:18,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:18,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:18,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:18,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:18,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:18,339 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 [2020-10-12 09:51:18,363 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:18,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:18,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:18,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:18,365 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:18,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:18,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:18,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:18,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:18,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:18,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:18,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:18,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:18,367 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:18,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:18,368 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:18,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:18,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:18,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:18,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:18,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:18,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:18,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:18,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:18,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:18,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:18,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:18,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:18,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:18,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:51:18,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:18,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:18,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:18,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:18,706 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:18,707 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2020-10-12 09:51:18,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d817e621/57eb4e868aa0437ebd6702d04f75bf1c/FLAG9b26143d8 [2020-10-12 09:51:19,191 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:19,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2020-10-12 09:51:19,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d817e621/57eb4e868aa0437ebd6702d04f75bf1c/FLAG9b26143d8 [2020-10-12 09:51:19,625 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2d817e621/57eb4e868aa0437ebd6702d04f75bf1c [2020-10-12 09:51:19,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:19,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:19,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:19,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:19,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:19,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a098cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:19, skipping insertion in model container [2020-10-12 09:51:19,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:19" (1/1) ... [2020-10-12 09:51:19,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:19,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:19,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:19,968 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:20,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:20,106 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:20,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20 WrapperNode [2020-10-12 09:51:20,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:20,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:20,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:20,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:20,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (1/1) ... [2020-10-12 09:51:20,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:20,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:20,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:20,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:20,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (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 [2020-10-12 09:51:20,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:20,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:20,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:20,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:20,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:20,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:20,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:20,621 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:20,622 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-12 09:51:20,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:20 BoogieIcfgContainer [2020-10-12 09:51:20,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:20,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:20,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:20,631 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:20,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:19" (1/3) ... [2020-10-12 09:51:20,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549ac564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:20, skipping insertion in model container [2020-10-12 09:51:20,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:20" (2/3) ... [2020-10-12 09:51:20,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549ac564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:20, skipping insertion in model container [2020-10-12 09:51:20,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:20" (3/3) ... [2020-10-12 09:51:20,636 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2020-10-12 09:51:20,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:20,660 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:20,675 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:20,707 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:20,707 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:20,707 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:20,708 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:20,708 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:20,708 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:20,709 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:20,709 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-10-12 09:51:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:51:20,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:20,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:20,740 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2020-10-12 09:51:20,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:20,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374535364] [2020-10-12 09:51:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:20,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:51:22,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:51:22,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-12 09:51:22,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:51:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:22,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:22,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:22,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:22,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:22,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:22,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:22,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:22,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:22,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:22,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:51:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:22,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374535364] [2020-10-12 09:51:22,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:22,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:22,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427343032] [2020-10-12 09:51:22,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:22,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:23,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:23,009 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 4 states. [2020-10-12 09:51:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:23,303 INFO L93 Difference]: Finished difference Result 104 states and 159 transitions. [2020-10-12 09:51:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:23,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-12 09:51:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:23,314 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:51:23,315 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 09:51:23,319 INFO L675 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 [2020-10-12 09:51:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 09:51:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-12 09:51:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:51:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2020-10-12 09:51:23,367 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 29 [2020-10-12 09:51:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:23,367 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2020-10-12 09:51:23,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2020-10-12 09:51:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:51:23,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:23,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:23,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:23,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1500275198, now seen corresponding path program 1 times [2020-10-12 09:51:23,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:23,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907796951] [2020-10-12 09:51:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:23,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:23,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:27,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:28,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:51:28,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:28,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:51:28,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:28,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:51:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:28,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:28,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:28,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:28,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:28,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:28,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:51:28,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907796951] [2020-10-12 09:51:28,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:28,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:28,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681099241] [2020-10-12 09:51:28,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:28,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:28,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:28,497 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 5 states. [2020-10-12 09:51:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:28,816 INFO L93 Difference]: Finished difference Result 114 states and 138 transitions. [2020-10-12 09:51:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:28,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-10-12 09:51:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:28,820 INFO L225 Difference]: With dead ends: 114 [2020-10-12 09:51:28,820 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 09:51:28,823 INFO L675 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 [2020-10-12 09:51:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 09:51:28,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-12 09:51:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:51:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-12 09:51:28,847 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 45 [2020-10-12 09:51:28,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:28,848 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-12 09:51:28,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-12 09:51:28,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:51:28,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:28,852 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] [2020-10-12 09:51:28,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:28,852 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1551791118, now seen corresponding path program 2 times [2020-10-12 09:51:28,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:28,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067914421] [2020-10-12 09:51:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:28,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:28,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:33,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:51:33,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:51:33,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:51:33,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:33,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 09:51:33,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:33,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:33,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:33,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:33,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:33,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:33,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:33,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:33,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 09:51:33,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067914421] [2020-10-12 09:51:33,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:33,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:33,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196246539] [2020-10-12 09:51:33,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:33,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:33,947 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 6 states. [2020-10-12 09:51:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:34,270 INFO L93 Difference]: Finished difference Result 144 states and 168 transitions. [2020-10-12 09:51:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:34,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-12 09:51:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:34,272 INFO L225 Difference]: With dead ends: 144 [2020-10-12 09:51:34,272 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 09:51:34,274 INFO L675 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 [2020-10-12 09:51:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 09:51:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-12 09:51:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 09:51:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2020-10-12 09:51:34,289 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 61 [2020-10-12 09:51:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:34,289 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2020-10-12 09:51:34,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2020-10-12 09:51:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 09:51:34,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:34,294 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] [2020-10-12 09:51:34,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:34,294 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:34,295 INFO L82 PathProgramCache]: Analyzing trace with hash 640965090, now seen corresponding path program 3 times [2020-10-12 09:51:34,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:34,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267674098] [2020-10-12 09:51:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:34,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:34,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:38,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 09:51:39,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:51:39,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 09:51:39,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:39,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:51:39,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:39,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:39,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:39,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:39,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:39,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:39,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:39,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:39,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:39,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-12 09:51:39,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267674098] [2020-10-12 09:51:39,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:39,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:39,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549517429] [2020-10-12 09:51:39,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:39,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:39,448 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 7 states. [2020-10-12 09:51:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:39,766 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2020-10-12 09:51:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:39,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-10-12 09:51:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:39,768 INFO L225 Difference]: With dead ends: 174 [2020-10-12 09:51:39,768 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 09:51:39,771 INFO L675 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 [2020-10-12 09:51:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 09:51:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-10-12 09:51:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 09:51:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2020-10-12 09:51:39,791 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 77 [2020-10-12 09:51:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:39,792 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2020-10-12 09:51:39,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2020-10-12 09:51:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 09:51:39,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:39,797 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] [2020-10-12 09:51:39,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:39,798 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash 741083090, now seen corresponding path program 4 times [2020-10-12 09:51:39,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:39,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416360055] [2020-10-12 09:51:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:39,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:39,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:44,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 09:51:44,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:44,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 09:51:44,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:44,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:44,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:44,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:44,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:44,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:44,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:44,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:44,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:44,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:44,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:44,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:44,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-12 09:51:44,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416360055] [2020-10-12 09:51:44,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:44,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:44,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554210931] [2020-10-12 09:51:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:44,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:44,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:44,969 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand 8 states. [2020-10-12 09:51:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:45,306 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2020-10-12 09:51:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:45,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 93 [2020-10-12 09:51:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:45,310 INFO L225 Difference]: With dead ends: 204 [2020-10-12 09:51:45,312 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 09:51:45,313 INFO L675 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 [2020-10-12 09:51:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 09:51:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 115. [2020-10-12 09:51:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:51:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-12 09:51:45,332 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 93 [2020-10-12 09:51:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:45,333 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-12 09:51:45,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-12 09:51:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-12 09:51:45,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:45,337 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] [2020-10-12 09:51:45,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:45,338 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:45,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:45,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1226271294, now seen corresponding path program 5 times [2020-10-12 09:51:45,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:45,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631620346] [2020-10-12 09:51:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:45,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:45,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-12 09:51:50,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:50,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 09:51:50,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:51:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:50,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:50,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:50,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:50,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:50,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:50,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:50,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:50,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:50,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-12 09:51:50,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631620346] [2020-10-12 09:51:50,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:50,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:50,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748326617] [2020-10-12 09:51:50,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:50,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:50,496 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 9 states. [2020-10-12 09:51:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:50,865 INFO L93 Difference]: Finished difference Result 234 states and 258 transitions. [2020-10-12 09:51:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:50,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 109 [2020-10-12 09:51:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:50,867 INFO L225 Difference]: With dead ends: 234 [2020-10-12 09:51:50,867 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 09:51:50,872 INFO L675 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 [2020-10-12 09:51:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 09:51:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-10-12 09:51:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:51:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2020-10-12 09:51:50,897 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 109 [2020-10-12 09:51:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:50,897 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2020-10-12 09:51:50,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:50,897 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2020-10-12 09:51:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:51:50,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:50,901 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] [2020-10-12 09:51:50,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:50,902 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:50,902 INFO L82 PathProgramCache]: Analyzing trace with hash -873856078, now seen corresponding path program 6 times [2020-10-12 09:51:50,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:50,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595244583] [2020-10-12 09:51:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:50,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:50,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:55,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-12 09:51:55,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:55,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 09:51:55,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-12 09:51:55,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:55,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:56,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:56,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:56,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:56,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:56,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:56,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:56,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:56,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-12 09:51:56,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595244583] [2020-10-12 09:51:56,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:56,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:56,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240469099] [2020-10-12 09:51:56,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:56,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:56,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:56,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:56,053 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand 10 states. [2020-10-12 09:51:56,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:56,616 INFO L93 Difference]: Finished difference Result 264 states and 288 transitions. [2020-10-12 09:51:56,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:56,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 125 [2020-10-12 09:51:56,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:56,618 INFO L225 Difference]: With dead ends: 264 [2020-10-12 09:51:56,619 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 09:51:56,620 INFO L675 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 [2020-10-12 09:51:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 09:51:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2020-10-12 09:51:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 09:51:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2020-10-12 09:51:56,629 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 125 [2020-10-12 09:51:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:56,629 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2020-10-12 09:51:56,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2020-10-12 09:51:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-12 09:51:56,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:56,631 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] [2020-10-12 09:51:56,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:56,632 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:56,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1957712290, now seen corresponding path program 7 times [2020-10-12 09:51:56,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:56,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436344274] [2020-10-12 09:51:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:56,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-12 09:52:01,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:01,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-12 09:52:01,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:52:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:52:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:01,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:01,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:01,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:01,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:01,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:01,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:01,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:01,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:01,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:01,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:01,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-12 09:52:01,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436344274] [2020-10-12 09:52:01,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:01,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:52:01,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100648015] [2020-10-12 09:52:01,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:52:01,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:52:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:52:01,819 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand 11 states. [2020-10-12 09:52:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:02,290 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2020-10-12 09:52:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:52:02,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 141 [2020-10-12 09:52:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:02,293 INFO L225 Difference]: With dead ends: 294 [2020-10-12 09:52:02,293 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 09:52:02,294 INFO L675 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 [2020-10-12 09:52:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 09:52:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2020-10-12 09:52:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 09:52:02,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 172 transitions. [2020-10-12 09:52:02,310 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 172 transitions. Word has length 141 [2020-10-12 09:52:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:02,311 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 172 transitions. [2020-10-12 09:52:02,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:52:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 172 transitions. [2020-10-12 09:52:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-12 09:52:02,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:02,329 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] [2020-10-12 09:52:02,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:52:02,330 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1095008366, now seen corresponding path program 8 times [2020-10-12 09:52:02,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:02,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52790594] [2020-10-12 09:52:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:02,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:02,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:07,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 09:52:07,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:07,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-12 09:52:07,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:07,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:52:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:52:07,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:52:07,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:07,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:07,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:07,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:07,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:07,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:07,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:07,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:07,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:07,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-12 09:52:07,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52790594] [2020-10-12 09:52:07,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:07,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:52:07,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865900325] [2020-10-12 09:52:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:52:07,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:52:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:07,503 INFO L87 Difference]: Start difference. First operand 163 states and 172 transitions. Second operand 12 states. [2020-10-12 09:52:07,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:07,994 INFO L93 Difference]: Finished difference Result 324 states and 348 transitions. [2020-10-12 09:52:07,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:52:07,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 157 [2020-10-12 09:52:07,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:07,997 INFO L225 Difference]: With dead ends: 324 [2020-10-12 09:52:07,997 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 09:52:07,998 INFO L675 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 [2020-10-12 09:52:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 09:52:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2020-10-12 09:52:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 09:52:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 188 transitions. [2020-10-12 09:52:08,004 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 188 transitions. Word has length 157 [2020-10-12 09:52:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:08,005 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 188 transitions. [2020-10-12 09:52:08,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:52:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 188 transitions. [2020-10-12 09:52:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 09:52:08,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:08,007 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] [2020-10-12 09:52:08,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:52:08,008 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:08,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1148482174, now seen corresponding path program 9 times [2020-10-12 09:52:08,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:08,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835973195] [2020-10-12 09:52:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:08,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:13,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 09:52:13,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:13,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-12 09:52:13,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:52:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:52:13,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:52:13,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:13,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:13,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:13,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:13,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-10-12 09:52:13,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835973195] [2020-10-12 09:52:13,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:13,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:52:13,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33734426] [2020-10-12 09:52:13,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:52:13,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:52:13,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:13,289 INFO L87 Difference]: Start difference. First operand 179 states and 188 transitions. Second operand 13 states. [2020-10-12 09:52:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:13,816 INFO L93 Difference]: Finished difference Result 354 states and 378 transitions. [2020-10-12 09:52:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:52:13,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 173 [2020-10-12 09:52:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:13,819 INFO L225 Difference]: With dead ends: 354 [2020-10-12 09:52:13,819 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 09:52:13,820 INFO L675 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 [2020-10-12 09:52:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 09:52:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2020-10-12 09:52:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 09:52:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 204 transitions. [2020-10-12 09:52:13,830 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 204 transitions. Word has length 173 [2020-10-12 09:52:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:13,830 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 204 transitions. [2020-10-12 09:52:13,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:52:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 204 transitions. [2020-10-12 09:52:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-12 09:52:13,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:13,837 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] [2020-10-12 09:52:13,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:52:13,838 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:13,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2136966286, now seen corresponding path program 10 times [2020-10-12 09:52:13,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:13,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650585159] [2020-10-12 09:52:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:13,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:13,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:18,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:18,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:18,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:19,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:19,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:19,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:19,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:19,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-12 09:52:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650585159] [2020-10-12 09:52:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:19,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903267982] [2020-10-12 09:52:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:19,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:19,101 INFO L87 Difference]: Start difference. First operand 195 states and 204 transitions. Second operand 14 states. [2020-10-12 09:52:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:19,671 INFO L93 Difference]: Finished difference Result 384 states and 408 transitions. [2020-10-12 09:52:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:19,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 189 [2020-10-12 09:52:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:19,674 INFO L225 Difference]: With dead ends: 384 [2020-10-12 09:52:19,675 INFO L226 Difference]: Without dead ends: 219 [2020-10-12 09:52:19,676 INFO L675 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 [2020-10-12 09:52:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-12 09:52:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 211. [2020-10-12 09:52:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-12 09:52:19,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 220 transitions. [2020-10-12 09:52:19,684 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 220 transitions. Word has length 189 [2020-10-12 09:52:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:19,684 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 220 transitions. [2020-10-12 09:52:19,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:19,685 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 220 transitions. [2020-10-12 09:52:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-12 09:52:19,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:19,687 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] [2020-10-12 09:52:19,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:19,688 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:19,688 INFO L82 PathProgramCache]: Analyzing trace with hash 662325602, now seen corresponding path program 11 times [2020-10-12 09:52:19,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:19,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000276050] [2020-10-12 09:52:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:19,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:24,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:24,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-12 09:52:24,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:24,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-12 09:52:24,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:52:24,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:24,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:24,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:24,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:24,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:24,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:24,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:24,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-12 09:52:24,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000276050] [2020-10-12 09:52:24,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:24,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:24,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989414439] [2020-10-12 09:52:24,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:24,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:24,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:24,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:24,908 INFO L87 Difference]: Start difference. First operand 211 states and 220 transitions. Second operand 15 states. [2020-10-12 09:52:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:25,527 INFO L93 Difference]: Finished difference Result 414 states and 438 transitions. [2020-10-12 09:52:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:25,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 205 [2020-10-12 09:52:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:25,531 INFO L225 Difference]: With dead ends: 414 [2020-10-12 09:52:25,531 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 09:52:25,532 INFO L675 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 [2020-10-12 09:52:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 09:52:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2020-10-12 09:52:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 09:52:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 236 transitions. [2020-10-12 09:52:25,547 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 236 transitions. Word has length 205 [2020-10-12 09:52:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:25,547 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 236 transitions. [2020-10-12 09:52:25,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 236 transitions. [2020-10-12 09:52:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-12 09:52:25,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:25,551 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] [2020-10-12 09:52:25,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:25,551 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:25,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash -845613230, now seen corresponding path program 12 times [2020-10-12 09:52:25,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:25,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798695372] [2020-10-12 09:52:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:25,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:25,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:30,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:30,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:30,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:30,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:30,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:30,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:30,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:30,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:30,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:30,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:30,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:30,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2020-10-12 09:52:30,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798695372] [2020-10-12 09:52:30,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:30,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:30,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027413749] [2020-10-12 09:52:30,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:30,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:30,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:30,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:30,903 INFO L87 Difference]: Start difference. First operand 227 states and 236 transitions. Second operand 16 states. [2020-10-12 09:52:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:31,534 INFO L93 Difference]: Finished difference Result 444 states and 468 transitions. [2020-10-12 09:52:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:31,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 221 [2020-10-12 09:52:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:31,538 INFO L225 Difference]: With dead ends: 444 [2020-10-12 09:52:31,538 INFO L226 Difference]: Without dead ends: 251 [2020-10-12 09:52:31,539 INFO L675 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 [2020-10-12 09:52:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-12 09:52:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 243. [2020-10-12 09:52:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 09:52:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 252 transitions. [2020-10-12 09:52:31,548 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 252 transitions. Word has length 221 [2020-10-12 09:52:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:31,549 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 252 transitions. [2020-10-12 09:52:31,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 252 transitions. [2020-10-12 09:52:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-12 09:52:31,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:31,552 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] [2020-10-12 09:52:31,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:31,552 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:31,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1803778750, now seen corresponding path program 13 times [2020-10-12 09:52:31,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:31,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614011911] [2020-10-12 09:52:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:31,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:31,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:35,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:36,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:36,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-12 09:52:36,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:36,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-12 09:52:36,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:36,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:36,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:36,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:36,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:36,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:36,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:36,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:36,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:36,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:36,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:36,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:36,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:36,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2020-10-12 09:52:36,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614011911] [2020-10-12 09:52:36,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:36,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:36,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473444304] [2020-10-12 09:52:36,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:36,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:37,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:37,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:37,001 INFO L87 Difference]: Start difference. First operand 243 states and 252 transitions. Second operand 17 states. [2020-10-12 09:52:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:37,721 INFO L93 Difference]: Finished difference Result 474 states and 498 transitions. [2020-10-12 09:52:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:37,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 237 [2020-10-12 09:52:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:37,725 INFO L225 Difference]: With dead ends: 474 [2020-10-12 09:52:37,725 INFO L226 Difference]: Without dead ends: 267 [2020-10-12 09:52:37,726 INFO L675 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 [2020-10-12 09:52:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-12 09:52:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 259. [2020-10-12 09:52:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 09:52:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-12 09:52:37,736 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 237 [2020-10-12 09:52:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:37,736 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-12 09:52:37,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-12 09:52:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-12 09:52:37,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:37,738 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] [2020-10-12 09:52:37,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:37,738 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1583025358, now seen corresponding path program 14 times [2020-10-12 09:52:37,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:37,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802978382] [2020-10-12 09:52:37,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:37,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:41,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:42,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:43,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:43,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:43,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:43,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2020-10-12 09:52:43,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802978382] [2020-10-12 09:52:43,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:43,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:43,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2710844] [2020-10-12 09:52:43,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:43,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:43,147 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 18 states. [2020-10-12 09:52:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:43,891 INFO L93 Difference]: Finished difference Result 504 states and 528 transitions. [2020-10-12 09:52:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:43,892 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 253 [2020-10-12 09:52:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:43,895 INFO L225 Difference]: With dead ends: 504 [2020-10-12 09:52:43,895 INFO L226 Difference]: Without dead ends: 283 [2020-10-12 09:52:43,896 INFO L675 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 [2020-10-12 09:52:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-12 09:52:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 275. [2020-10-12 09:52:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-12 09:52:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 284 transitions. [2020-10-12 09:52:43,907 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 284 transitions. Word has length 253 [2020-10-12 09:52:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:43,908 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 284 transitions. [2020-10-12 09:52:43,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 284 transitions. [2020-10-12 09:52:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-12 09:52:43,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:43,910 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] [2020-10-12 09:52:43,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:43,910 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash 512901410, now seen corresponding path program 15 times [2020-10-12 09:52:43,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:43,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093402804] [2020-10-12 09:52:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:43,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:48,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:48,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-12 09:52:48,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:48,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-12 09:52:48,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:48,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:48,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 09:52:48,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:48,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:49,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:49,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:49,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:49,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:49,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-12 09:52:49,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093402804] [2020-10-12 09:52:49,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:49,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:49,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431094288] [2020-10-12 09:52:49,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:49,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:49,246 INFO L87 Difference]: Start difference. First operand 275 states and 284 transitions. Second operand 19 states. [2020-10-12 09:52:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:49,976 INFO L93 Difference]: Finished difference Result 534 states and 558 transitions. [2020-10-12 09:52:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:49,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 269 [2020-10-12 09:52:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:49,978 INFO L225 Difference]: With dead ends: 534 [2020-10-12 09:52:49,978 INFO L226 Difference]: Without dead ends: 299 [2020-10-12 09:52:49,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-12 09:52:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 291. [2020-10-12 09:52:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 09:52:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 300 transitions. [2020-10-12 09:52:49,990 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 300 transitions. Word has length 269 [2020-10-12 09:52:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:49,990 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 300 transitions. [2020-10-12 09:52:49,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 300 transitions. [2020-10-12 09:52:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-12 09:52:49,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:49,992 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] [2020-10-12 09:52:49,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:49,993 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash 952397586, now seen corresponding path program 16 times [2020-10-12 09:52:49,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:49,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207952230] [2020-10-12 09:52:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:55,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5146 [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:55,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:55,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:55,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:55,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2020-10-12 09:52:55,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207952230] [2020-10-12 09:52:55,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:55,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:55,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301597018] [2020-10-12 09:52:55,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:55,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:55,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:55,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:55,439 INFO L87 Difference]: Start difference. First operand 291 states and 300 transitions. Second operand 20 states. [2020-10-12 09:52:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:56,264 INFO L93 Difference]: Finished difference Result 564 states and 588 transitions. [2020-10-12 09:52:56,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:56,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 285 [2020-10-12 09:52:56,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:56,266 INFO L225 Difference]: With dead ends: 564 [2020-10-12 09:52:56,267 INFO L226 Difference]: Without dead ends: 315 [2020-10-12 09:52:56,268 INFO L675 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 [2020-10-12 09:52:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-12 09:52:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2020-10-12 09:52:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-12 09:52:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 316 transitions. [2020-10-12 09:52:56,284 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 316 transitions. Word has length 285 [2020-10-12 09:52:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:56,284 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 316 transitions. [2020-10-12 09:52:56,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 316 transitions. [2020-10-12 09:52:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-12 09:52:56,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:56,287 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] [2020-10-12 09:52:56,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:56,288 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 565935362, now seen corresponding path program 17 times [2020-10-12 09:52:56,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:56,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514082822] [2020-10-12 09:52:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:56,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:01,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-12 09:53:01,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:01,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 09:53:01,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:01,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:53:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 09:53:01,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:53:01,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:01,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:01,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:01,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:01,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2020-10-12 09:53:01,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514082822] [2020-10-12 09:53:01,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:01,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:53:01,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639555206] [2020-10-12 09:53:01,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:53:01,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:01,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:53:01,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:53:01,627 INFO L87 Difference]: Start difference. First operand 307 states and 316 transitions. Second operand 21 states. [2020-10-12 09:53:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:02,517 INFO L93 Difference]: Finished difference Result 594 states and 618 transitions. [2020-10-12 09:53:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:53:02,518 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 301 [2020-10-12 09:53:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:02,520 INFO L225 Difference]: With dead ends: 594 [2020-10-12 09:53:02,520 INFO L226 Difference]: Without dead ends: 331 [2020-10-12 09:53:02,522 INFO L675 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 [2020-10-12 09:53:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-12 09:53:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 323. [2020-10-12 09:53:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-12 09:53:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 332 transitions. [2020-10-12 09:53:02,534 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 332 transitions. Word has length 301 [2020-10-12 09:53:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:02,535 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 332 transitions. [2020-10-12 09:53:02,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:53:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 332 transitions. [2020-10-12 09:53:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-12 09:53:02,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:02,537 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] [2020-10-12 09:53:02,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:53:02,538 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 251095794, now seen corresponding path program 18 times [2020-10-12 09:53:02,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:02,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547131960] [2020-10-12 09:53:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:02,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:07,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-12 09:53:07,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:07,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5223 [2020-10-12 09:53:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:53:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-12 09:53:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:53:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:08,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:08,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:08,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:08,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:08,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:08,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:08,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:08,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:08,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-12 09:53:08,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547131960] [2020-10-12 09:53:08,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:08,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:53:08,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911893525] [2020-10-12 09:53:08,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:53:08,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:08,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:53:08,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:08,144 INFO L87 Difference]: Start difference. First operand 323 states and 332 transitions. Second operand 22 states. [2020-10-12 09:53:09,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:09,008 INFO L93 Difference]: Finished difference Result 624 states and 648 transitions. [2020-10-12 09:53:09,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:53:09,009 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 317 [2020-10-12 09:53:09,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:09,011 INFO L225 Difference]: With dead ends: 624 [2020-10-12 09:53:09,011 INFO L226 Difference]: Without dead ends: 347 [2020-10-12 09:53:09,012 INFO L675 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 [2020-10-12 09:53:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-12 09:53:09,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2020-10-12 09:53:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-12 09:53:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 348 transitions. [2020-10-12 09:53:09,025 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 348 transitions. Word has length 317 [2020-10-12 09:53:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:09,025 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 348 transitions. [2020-10-12 09:53:09,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:53:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 348 transitions. [2020-10-12 09:53:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-12 09:53:09,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:09,027 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] [2020-10-12 09:53:09,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:53:09,028 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash 972568802, now seen corresponding path program 19 times [2020-10-12 09:53:09,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:09,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591041459] [2020-10-12 09:53:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:09,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5369 [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:14,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:14,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:14,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:14,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:14,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:14,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:14,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:14,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:14,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:14,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2527 trivial. 0 not checked. [2020-10-12 09:53:14,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591041459] [2020-10-12 09:53:14,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:14,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:14,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727609682] [2020-10-12 09:53:14,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:14,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:14,956 INFO L87 Difference]: Start difference. First operand 339 states and 348 transitions. Second operand 23 states. [2020-10-12 09:53:16,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:16,063 INFO L93 Difference]: Finished difference Result 654 states and 678 transitions. [2020-10-12 09:53:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:16,064 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 333 [2020-10-12 09:53:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:16,067 INFO L225 Difference]: With dead ends: 654 [2020-10-12 09:53:16,067 INFO L226 Difference]: Without dead ends: 363 [2020-10-12 09:53:16,068 INFO L675 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 [2020-10-12 09:53:16,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-12 09:53:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 355. [2020-10-12 09:53:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-12 09:53:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 364 transitions. [2020-10-12 09:53:16,087 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 364 transitions. Word has length 333 [2020-10-12 09:53:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:16,090 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 364 transitions. [2020-10-12 09:53:16,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 364 transitions. [2020-10-12 09:53:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-12 09:53:16,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:16,094 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] [2020-10-12 09:53:16,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:53:16,094 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash -532814126, now seen corresponding path program 20 times [2020-10-12 09:53:16,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:16,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96711015] [2020-10-12 09:53:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:21,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-12 09:53:21,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:21,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5413 [2020-10-12 09:53:21,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:21,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:21,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:21,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:21,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:21,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:21,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:21,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:21,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:21,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:21,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:21,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:21,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2020-10-12 09:53:21,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96711015] [2020-10-12 09:53:21,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:21,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:21,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276949751] [2020-10-12 09:53:21,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:21,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:21,964 INFO L87 Difference]: Start difference. First operand 355 states and 364 transitions. Second operand 24 states. [2020-10-12 09:53:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:23,137 INFO L93 Difference]: Finished difference Result 684 states and 708 transitions. [2020-10-12 09:53:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:23,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 349 [2020-10-12 09:53:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:23,140 INFO L225 Difference]: With dead ends: 684 [2020-10-12 09:53:23,140 INFO L226 Difference]: Without dead ends: 379 [2020-10-12 09:53:23,141 INFO L675 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 [2020-10-12 09:53:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-12 09:53:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 371. [2020-10-12 09:53:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-10-12 09:53:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 380 transitions. [2020-10-12 09:53:23,153 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 380 transitions. Word has length 349 [2020-10-12 09:53:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:23,154 INFO L479 AbstractCegarLoop]: Abstraction has 371 states and 380 transitions. [2020-10-12 09:53:23,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 380 transitions. [2020-10-12 09:53:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-12 09:53:23,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:23,157 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] [2020-10-12 09:53:23,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:23,157 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1128821954, now seen corresponding path program 21 times [2020-10-12 09:53:23,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:23,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691148479] [2020-10-12 09:53:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:23,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:30,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7594 [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:30,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:31,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:31,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:31,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:31,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:31,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:31,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:31,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:31,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:31,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2020-10-12 09:53:31,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691148479] [2020-10-12 09:53:31,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:31,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:31,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616523364] [2020-10-12 09:53:31,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:31,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:31,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:31,220 INFO L87 Difference]: Start difference. First operand 371 states and 380 transitions. Second operand 25 states. [2020-10-12 09:53:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:32,307 INFO L93 Difference]: Finished difference Result 714 states and 738 transitions. [2020-10-12 09:53:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:32,310 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 365 [2020-10-12 09:53:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:32,312 INFO L225 Difference]: With dead ends: 714 [2020-10-12 09:53:32,312 INFO L226 Difference]: Without dead ends: 395 [2020-10-12 09:53:32,314 INFO L675 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 [2020-10-12 09:53:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-12 09:53:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2020-10-12 09:53:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-10-12 09:53:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 396 transitions. [2020-10-12 09:53:32,326 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 396 transitions. Word has length 365 [2020-10-12 09:53:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:32,326 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 396 transitions. [2020-10-12 09:53:32,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 396 transitions. [2020-10-12 09:53:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-12 09:53:32,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:32,329 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] [2020-10-12 09:53:32,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:32,330 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1466441038, now seen corresponding path program 22 times [2020-10-12 09:53:32,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:32,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983781543] [2020-10-12 09:53:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:32,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:32,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:38,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 389 [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6177 [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 151 [2020-10-12 09:53:38,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:38,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:38,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:38,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:38,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:38,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:38,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-10-12 09:53:39,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983781543] [2020-10-12 09:53:39,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:39,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:39,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521012379] [2020-10-12 09:53:39,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:39,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:39,011 INFO L87 Difference]: Start difference. First operand 387 states and 396 transitions. Second operand 26 states. [2020-10-12 09:53:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:40,138 INFO L93 Difference]: Finished difference Result 744 states and 768 transitions. [2020-10-12 09:53:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:40,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 381 [2020-10-12 09:53:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:40,141 INFO L225 Difference]: With dead ends: 744 [2020-10-12 09:53:40,141 INFO L226 Difference]: Without dead ends: 411 [2020-10-12 09:53:40,143 INFO L675 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 [2020-10-12 09:53:40,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-12 09:53:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2020-10-12 09:53:40,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-12 09:53:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 412 transitions. [2020-10-12 09:53:40,156 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 412 transitions. Word has length 381 [2020-10-12 09:53:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:40,157 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 412 transitions. [2020-10-12 09:53:40,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 412 transitions. [2020-10-12 09:53:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-12 09:53:40,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:40,160 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] [2020-10-12 09:53:40,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:40,160 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:40,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1504456866, now seen corresponding path program 23 times [2020-10-12 09:53:40,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:40,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111314469] [2020-10-12 09:53:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:40,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:40,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:45,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:45,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5332 [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:45,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:45,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:45,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:45,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:45,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:45,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:45,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:45,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:45,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3703 trivial. 0 not checked. [2020-10-12 09:53:46,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111314469] [2020-10-12 09:53:46,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:46,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:46,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172832044] [2020-10-12 09:53:46,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:46,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:46,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:46,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:46,027 INFO L87 Difference]: Start difference. First operand 403 states and 412 transitions. Second operand 27 states. [2020-10-12 09:53:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:47,079 INFO L93 Difference]: Finished difference Result 774 states and 798 transitions. [2020-10-12 09:53:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:47,080 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 397 [2020-10-12 09:53:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:47,083 INFO L225 Difference]: With dead ends: 774 [2020-10-12 09:53:47,084 INFO L226 Difference]: Without dead ends: 427 [2020-10-12 09:53:47,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-12 09:53:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 419. [2020-10-12 09:53:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-12 09:53:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 428 transitions. [2020-10-12 09:53:47,097 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 428 transitions. Word has length 397 [2020-10-12 09:53:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:47,098 INFO L479 AbstractCegarLoop]: Abstraction has 419 states and 428 transitions. [2020-10-12 09:53:47,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 428 transitions. [2020-10-12 09:53:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-12 09:53:47,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:47,101 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] [2020-10-12 09:53:47,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:47,101 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1543151982, now seen corresponding path program 24 times [2020-10-12 09:53:47,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:47,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528431421] [2020-10-12 09:53:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:47,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:47,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5696 [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:52,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 09:53:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:52,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:53,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:53,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:53,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:53,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:53,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:53,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:53,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:53,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:53,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:53,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2020-10-12 09:53:53,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528431421] [2020-10-12 09:53:53,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:53,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:53,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199310945] [2020-10-12 09:53:53,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:53,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:53,437 INFO L87 Difference]: Start difference. First operand 419 states and 428 transitions. Second operand 28 states. [2020-10-12 09:53:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:54,648 INFO L93 Difference]: Finished difference Result 804 states and 828 transitions. [2020-10-12 09:53:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:54,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 413 [2020-10-12 09:53:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:54,652 INFO L225 Difference]: With dead ends: 804 [2020-10-12 09:53:54,652 INFO L226 Difference]: Without dead ends: 443 [2020-10-12 09:53:54,654 INFO L675 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 [2020-10-12 09:53:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-12 09:53:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 435. [2020-10-12 09:53:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-10-12 09:53:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 444 transitions. [2020-10-12 09:53:54,666 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 444 transitions. Word has length 413 [2020-10-12 09:53:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:54,666 INFO L479 AbstractCegarLoop]: Abstraction has 435 states and 444 transitions. [2020-10-12 09:53:54,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 444 transitions. [2020-10-12 09:53:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-12 09:53:54,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:54,670 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] [2020-10-12 09:53:54,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:54,670 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash -651989886, now seen corresponding path program 25 times [2020-10-12 09:53:54,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:54,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451000388] [2020-10-12 09:53:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:55,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 437 [2020-10-12 09:54:06,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:06,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11702 [2020-10-12 09:54:06,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:54:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:06,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:54:06,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:06,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:06,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:06,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:06,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:06,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:06,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:06,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:06,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:06,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4375 trivial. 0 not checked. [2020-10-12 09:54:07,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451000388] [2020-10-12 09:54:07,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:07,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:54:07,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158772675] [2020-10-12 09:54:07,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:54:07,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:07,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:54:07,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:54:07,068 INFO L87 Difference]: Start difference. First operand 435 states and 444 transitions. Second operand 29 states. [2020-10-12 09:54:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:08,358 INFO L93 Difference]: Finished difference Result 834 states and 858 transitions. [2020-10-12 09:54:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:54:08,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 429 [2020-10-12 09:54:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:08,362 INFO L225 Difference]: With dead ends: 834 [2020-10-12 09:54:08,362 INFO L226 Difference]: Without dead ends: 459 [2020-10-12 09:54:08,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:54:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-12 09:54:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 451. [2020-10-12 09:54:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-12 09:54:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 460 transitions. [2020-10-12 09:54:08,375 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 460 transitions. Word has length 429 [2020-10-12 09:54:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:08,376 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 460 transitions. [2020-10-12 09:54:08,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:54:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 460 transitions. [2020-10-12 09:54:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-10-12 09:54:08,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:08,379 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] [2020-10-12 09:54:08,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:54:08,380 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1317427826, now seen corresponding path program 26 times [2020-10-12 09:54:08,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:08,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664919905] [2020-10-12 09:54:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:08,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:08,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:13,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 453 [2020-10-12 09:54:13,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:13,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:54:13,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:54:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:54:13,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:54:13,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:14,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:14,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:14,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:14,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:14,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2020-10-12 09:54:14,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664919905] [2020-10-12 09:54:14,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:14,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:54:14,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111588014] [2020-10-12 09:54:14,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:54:14,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:14,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:54:14,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:14,138 INFO L87 Difference]: Start difference. First operand 451 states and 460 transitions. Second operand 30 states. [2020-10-12 09:54:15,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:15,421 INFO L93 Difference]: Finished difference Result 864 states and 888 transitions. [2020-10-12 09:54:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:54:15,421 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 445 [2020-10-12 09:54:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:15,424 INFO L225 Difference]: With dead ends: 864 [2020-10-12 09:54:15,425 INFO L226 Difference]: Without dead ends: 475 [2020-10-12 09:54:15,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:54:15,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-12 09:54:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 467. [2020-10-12 09:54:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-12 09:54:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 476 transitions. [2020-10-12 09:54:15,437 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 476 transitions. Word has length 445 [2020-10-12 09:54:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:15,437 INFO L479 AbstractCegarLoop]: Abstraction has 467 states and 476 transitions. [2020-10-12 09:54:15,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:54:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 476 transitions. [2020-10-12 09:54:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-12 09:54:15,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:15,441 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] [2020-10-12 09:54:15,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:54:15,441 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1571694690, now seen corresponding path program 27 times [2020-10-12 09:54:15,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:15,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797284189] [2020-10-12 09:54:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:15,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:20,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:20,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-12 09:54:20,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:20,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-12 09:54:20,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:20,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:54:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-12 09:54:20,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:54:20,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:21,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:21,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:21,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:21,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5103 trivial. 0 not checked. [2020-10-12 09:54:21,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797284189] [2020-10-12 09:54:21,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:21,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:54:21,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351488449] [2020-10-12 09:54:21,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:54:21,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:54:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:21,224 INFO L87 Difference]: Start difference. First operand 467 states and 476 transitions. Second operand 31 states. [2020-10-12 09:54:22,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:22,609 INFO L93 Difference]: Finished difference Result 894 states and 918 transitions. [2020-10-12 09:54:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:54:22,610 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 461 [2020-10-12 09:54:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:22,614 INFO L225 Difference]: With dead ends: 894 [2020-10-12 09:54:22,614 INFO L226 Difference]: Without dead ends: 491 [2020-10-12 09:54:22,615 INFO L675 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 [2020-10-12 09:54:22,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-10-12 09:54:22,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 483. [2020-10-12 09:54:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-10-12 09:54:22,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 492 transitions. [2020-10-12 09:54:22,626 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 492 transitions. Word has length 461 [2020-10-12 09:54:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:22,626 INFO L479 AbstractCegarLoop]: Abstraction has 483 states and 492 transitions. [2020-10-12 09:54:22,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:54:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 492 transitions. [2020-10-12 09:54:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-10-12 09:54:22,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:22,630 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] [2020-10-12 09:54:22,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:54:22,630 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:22,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1679480402, now seen corresponding path program 28 times [2020-10-12 09:54:22,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:22,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938398347] [2020-10-12 09:54:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:22,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:22,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 485 [2020-10-12 09:54:28,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:28,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5394 [2020-10-12 09:54:28,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:54:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-12 09:54:28,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:54:28,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:28,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:28,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:28,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:28,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:28,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:28,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5488 trivial. 0 not checked. [2020-10-12 09:54:28,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938398347] [2020-10-12 09:54:28,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:28,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:28,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773682473] [2020-10-12 09:54:28,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:28,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:28,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:28,744 INFO L87 Difference]: Start difference. First operand 483 states and 492 transitions. Second operand 32 states. [2020-10-12 09:54:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:30,264 INFO L93 Difference]: Finished difference Result 924 states and 948 transitions. [2020-10-12 09:54:30,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:30,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 477 [2020-10-12 09:54:30,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:30,268 INFO L225 Difference]: With dead ends: 924 [2020-10-12 09:54:30,268 INFO L226 Difference]: Without dead ends: 507 [2020-10-12 09:54:30,269 INFO L675 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 [2020-10-12 09:54:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2020-10-12 09:54:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 499. [2020-10-12 09:54:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-10-12 09:54:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 508 transitions. [2020-10-12 09:54:30,281 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 508 transitions. Word has length 477 [2020-10-12 09:54:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:30,281 INFO L479 AbstractCegarLoop]: Abstraction has 499 states and 508 transitions. [2020-10-12 09:54:30,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 508 transitions. [2020-10-12 09:54:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-12 09:54:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:30,285 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] [2020-10-12 09:54:30,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:54:30,285 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1018403774, now seen corresponding path program 29 times [2020-10-12 09:54:30,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:30,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879475069] [2020-10-12 09:54:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:30,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:30,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 501 [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5686 [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:54:35,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:35,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:36,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:36,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:36,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:36,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:36,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5887 trivial. 0 not checked. [2020-10-12 09:54:36,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879475069] [2020-10-12 09:54:36,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:36,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:36,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429853] [2020-10-12 09:54:36,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:36,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:36,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:36,740 INFO L87 Difference]: Start difference. First operand 499 states and 508 transitions. Second operand 33 states. [2020-10-12 09:54:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:38,212 INFO L93 Difference]: Finished difference Result 954 states and 978 transitions. [2020-10-12 09:54:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:38,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 493 [2020-10-12 09:54:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:38,215 INFO L225 Difference]: With dead ends: 954 [2020-10-12 09:54:38,216 INFO L226 Difference]: Without dead ends: 523 [2020-10-12 09:54:38,217 INFO L675 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 [2020-10-12 09:54:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2020-10-12 09:54:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 515. [2020-10-12 09:54:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-10-12 09:54:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 524 transitions. [2020-10-12 09:54:38,229 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 524 transitions. Word has length 493 [2020-10-12 09:54:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:38,229 INFO L479 AbstractCegarLoop]: Abstraction has 515 states and 524 transitions. [2020-10-12 09:54:38,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 524 transitions. [2020-10-12 09:54:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-10-12 09:54:38,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:38,233 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] [2020-10-12 09:54:38,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:54:38,234 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash -524103118, now seen corresponding path program 30 times [2020-10-12 09:54:38,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:38,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379967267] [2020-10-12 09:54:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:38,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:38,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:45,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 517 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7103 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:45,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:46,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:46,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:46,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:46,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:46,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:46,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:46,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:46,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:46,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:46,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6300 trivial. 0 not checked. [2020-10-12 09:54:46,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379967267] [2020-10-12 09:54:46,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:46,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:46,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829016046] [2020-10-12 09:54:46,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:46,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:46,158 INFO L87 Difference]: Start difference. First operand 515 states and 524 transitions. Second operand 34 states. [2020-10-12 09:54:47,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:47,628 INFO L93 Difference]: Finished difference Result 984 states and 1008 transitions. [2020-10-12 09:54:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:47,629 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 509 [2020-10-12 09:54:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:47,632 INFO L225 Difference]: With dead ends: 984 [2020-10-12 09:54:47,632 INFO L226 Difference]: Without dead ends: 539 [2020-10-12 09:54:47,633 INFO L675 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 [2020-10-12 09:54:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-10-12 09:54:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 531. [2020-10-12 09:54:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-10-12 09:54:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 540 transitions. [2020-10-12 09:54:47,645 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 540 transitions. Word has length 509 [2020-10-12 09:54:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:47,645 INFO L479 AbstractCegarLoop]: Abstraction has 531 states and 540 transitions. [2020-10-12 09:54:47,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 540 transitions. [2020-10-12 09:54:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2020-10-12 09:54:47,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:47,650 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] [2020-10-12 09:54:47,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:47,650 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash 637411362, now seen corresponding path program 31 times [2020-10-12 09:54:47,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:47,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312397656] [2020-10-12 09:54:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:47,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:47,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:48,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:53,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:53,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 533 [2020-10-12 09:54:53,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:53,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5953 [2020-10-12 09:54:53,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:53,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:53,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:54:53,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:53,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:54,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:54,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:54,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:54,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:54,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:54,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:54,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:54,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 6727 trivial. 0 not checked. [2020-10-12 09:54:54,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312397656] [2020-10-12 09:54:54,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:54,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:54,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491899715] [2020-10-12 09:54:54,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:54,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:54,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:54,518 INFO L87 Difference]: Start difference. First operand 531 states and 540 transitions. Second operand 35 states. [2020-10-12 09:54:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:56,062 INFO L93 Difference]: Finished difference Result 1014 states and 1038 transitions. [2020-10-12 09:54:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:56,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 525 [2020-10-12 09:54:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:56,066 INFO L225 Difference]: With dead ends: 1014 [2020-10-12 09:54:56,066 INFO L226 Difference]: Without dead ends: 555 [2020-10-12 09:54:56,068 INFO L675 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 [2020-10-12 09:54:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-12 09:54:56,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 547. [2020-10-12 09:54:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-10-12 09:54:56,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 556 transitions. [2020-10-12 09:54:56,079 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 556 transitions. Word has length 525 [2020-10-12 09:54:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:56,080 INFO L479 AbstractCegarLoop]: Abstraction has 547 states and 556 transitions. [2020-10-12 09:54:56,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 556 transitions. [2020-10-12 09:54:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2020-10-12 09:54:56,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:56,084 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] [2020-10-12 09:54:56,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:56,084 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:56,085 INFO L82 PathProgramCache]: Analyzing trace with hash 8277522, now seen corresponding path program 32 times [2020-10-12 09:54:56,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:56,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800369621] [2020-10-12 09:54:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:56,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:56,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 549 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6282 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:55:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:03,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:03,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:03,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:03,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7168 trivial. 0 not checked. [2020-10-12 09:55:03,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800369621] [2020-10-12 09:55:03,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:03,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:55:03,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545603006] [2020-10-12 09:55:03,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:55:03,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:55:03,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:55:03,312 INFO L87 Difference]: Start difference. First operand 547 states and 556 transitions. Second operand 36 states. [2020-10-12 09:55:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:04,961 INFO L93 Difference]: Finished difference Result 1044 states and 1068 transitions. [2020-10-12 09:55:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:55:04,962 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 541 [2020-10-12 09:55:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:04,965 INFO L225 Difference]: With dead ends: 1044 [2020-10-12 09:55:04,965 INFO L226 Difference]: Without dead ends: 571 [2020-10-12 09:55:04,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:55:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-10-12 09:55:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 563. [2020-10-12 09:55:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-10-12 09:55:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 572 transitions. [2020-10-12 09:55:04,979 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 572 transitions. Word has length 541 [2020-10-12 09:55:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:04,980 INFO L479 AbstractCegarLoop]: Abstraction has 563 states and 572 transitions. [2020-10-12 09:55:04,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:55:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 572 transitions. [2020-10-12 09:55:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2020-10-12 09:55:04,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:04,984 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:04,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:55:04,984 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash -507290622, now seen corresponding path program 33 times [2020-10-12 09:55:04,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:04,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841239950] [2020-10-12 09:55:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking...