/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/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:16:43,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:16:43,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:16:43,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:16:43,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:16:43,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:16:43,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:16:43,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:16:43,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:16:43,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:16:43,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:16:43,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:16:43,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:16:43,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:16:43,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:16:43,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:16:43,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:16:43,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:16:43,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:16:43,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:16:43,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:16:43,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:16:43,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:16:43,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:16:43,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:16:43,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:16:43,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:16:43,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:16:43,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:16:43,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:16:43,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:16:43,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:16:43,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:16:43,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:16:43,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:16:43,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:16:43,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:16:43,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:16:43,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:16:43,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:16:43,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:16:43,323 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 16:16:43,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:16:43,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:16:43,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:16:43,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:16:43,366 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:16:43,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:16:43,366 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:16:43,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:16:43,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:16:43,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:16:43,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:16:43,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:16:43,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:16:43,369 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:16:43,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:16:43,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:16:43,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:16:43,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:16:43,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:16:43,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:16:43,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:16:43,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:16:43,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:16:43,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:16:43,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:16:43,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:16:43,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:16:43,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:16:43,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:16:43,372 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 16:16:43,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:16:43,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:16:43,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:16:43,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:16:43,719 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:16:43,719 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-12 16:16:43,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff6f9c82a/dda9d6a61b7347ac9459e910bb85c250/FLAG7acfb4a23 [2020-10-12 16:16:44,171 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:16:44,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-12 16:16:44,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff6f9c82a/dda9d6a61b7347ac9459e910bb85c250/FLAG7acfb4a23 [2020-10-12 16:16:44,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff6f9c82a/dda9d6a61b7347ac9459e910bb85c250 [2020-10-12 16:16:44,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:16:44,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:16:44,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:16:44,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:16:44,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:16:44,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cafb76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44, skipping insertion in model container [2020-10-12 16:16:44,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:16:44,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:16:44,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:16:44,832 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:16:44,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:16:44,861 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:16:44,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44 WrapperNode [2020-10-12 16:16:44,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:16:44,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:16:44,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:16:44,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:16:44,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,963 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (1/1) ... [2020-10-12 16:16:44,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:16:44,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:16:44,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:16:44,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:16:44,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (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 16:16:45,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:16:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:16:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:16:45,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:16:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:16:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:16:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:16:45,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:16:45,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:16:45,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:16:45,195 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 16:16:45,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:16:45 BoogieIcfgContainer [2020-10-12 16:16:45,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:16:45,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:16:45,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:16:45,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:16:45,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:16:44" (1/3) ... [2020-10-12 16:16:45,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f99935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:16:45, skipping insertion in model container [2020-10-12 16:16:45,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:44" (2/3) ... [2020-10-12 16:16:45,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f99935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:16:45, skipping insertion in model container [2020-10-12 16:16:45,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:16:45" (3/3) ... [2020-10-12 16:16:45,206 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2020-10-12 16:16:45,217 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:16:45,224 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:16:45,235 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:16:45,256 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:16:45,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:16:45,256 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:16:45,256 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:16:45,257 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:16:45,257 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:16:45,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:16:45,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:16:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 16:16:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:16:45,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:45,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:45,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1762590288, now seen corresponding path program 1 times [2020-10-12 16:16:45,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:45,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892905526] [2020-10-12 16:16:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 16:16:45,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:45,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-12 16:16:45,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:16:45,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:45,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:16:45,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:16:45,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:45,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:45,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:45,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:45,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:45,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:45,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:45,576 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 16:16:45,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892905526] [2020-10-12 16:16:45,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:16:45,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:16:45,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743540307] [2020-10-12 16:16:45,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:16:45,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:45,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:16:45,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:16:45,603 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-12 16:16:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:45,767 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2020-10-12 16:16:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:16:45,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-12 16:16:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:45,777 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:16:45,777 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:16:45,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:16:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:16:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-12 16:16:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:16:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-10-12 16:16:45,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2020-10-12 16:16:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:45,821 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-10-12 16:16:45,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:16:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-10-12 16:16:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:16:45,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:45,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:45,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:16:45,823 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash 830194858, now seen corresponding path program 1 times [2020-10-12 16:16:45,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:45,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749603235] [2020-10-12 16:16:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:16:45,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:45,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-12 16:16:45,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:16:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:45,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:16:45,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:45,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:46,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749603235] [2020-10-12 16:16:46,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:16:46,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283587176] [2020-10-12 16:16:46,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:16:46,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:16:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:16:46,014 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2020-10-12 16:16:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,032 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-10-12 16:16:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:16:46,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-12 16:16:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,034 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:16:46,034 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:16:46,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:16:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:16:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-10-12 16:16:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:16:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-12 16:16:46,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-10-12 16:16:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,040 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-12 16:16:46,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:16:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-12 16:16:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:16:46,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,042 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:16:46,042 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1774582, now seen corresponding path program 2 times [2020-10-12 16:16:46,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23275153] [2020-10-12 16:16:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:16:46,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-12 16:16:46,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:16:46,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:16:46,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:46,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23275153] [2020-10-12 16:16:46,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:16:46,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039085730] [2020-10-12 16:16:46,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:16:46,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:16:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:16:46,161 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-10-12 16:16:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,185 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-12 16:16:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:16:46,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-12 16:16:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,187 INFO L225 Difference]: With dead ends: 21 [2020-10-12 16:16:46,187 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:16:46,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:16:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:16:46,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:16:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:16:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-12 16:16:46,193 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-10-12 16:16:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,193 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-12 16:16:46,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:16:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-12 16:16:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:16:46,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,194 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:16:46,195 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash 90549802, now seen corresponding path program 3 times [2020-10-12 16:16:46,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139734463] [2020-10-12 16:16:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:16:46,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-12 16:16:46,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:16:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:16:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:46,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139734463] [2020-10-12 16:16:46,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:16:46,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701069553] [2020-10-12 16:16:46,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:16:46,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:16:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:16:46,363 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-10-12 16:16:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,382 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-12 16:16:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:16:46,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-12 16:16:46,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,384 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:16:46,384 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:16:46,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:16:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:16:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:16:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:16:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-12 16:16:46,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-12 16:16:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,389 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-12 16:16:46,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:16:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-12 16:16:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:16:46,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,390 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:16:46,391 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1452385674, now seen corresponding path program 4 times [2020-10-12 16:16:46,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016832822] [2020-10-12 16:16:46,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:16:46,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-12 16:16:46,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:16:46,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:16:46,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016832822] [2020-10-12 16:16:46,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:16:46,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453372751] [2020-10-12 16:16:46,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:16:46,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:16:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:16:46,535 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-12 16:16:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,555 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-12 16:16:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:16:46,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 16:16:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,557 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:16:46,557 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:16:46,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:16:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:16:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 16:16:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:16:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-12 16:16:46,562 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2020-10-12 16:16:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,562 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-12 16:16:46,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:16:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-12 16:16:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:16:46,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,563 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:16:46,564 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2038745174, now seen corresponding path program 5 times [2020-10-12 16:16:46,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555571170] [2020-10-12 16:16:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:16:46,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-12 16:16:46,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:16:46,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:16:46,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:46,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555571170] [2020-10-12 16:16:46,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:16:46,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962288952] [2020-10-12 16:16:46,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:16:46,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:16:46,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:16:46,717 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-10-12 16:16:46,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,738 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-12 16:16:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:16:46,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-12 16:16:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,739 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:16:46,739 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:16:46,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:16:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:16:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:16:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:16:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-12 16:16:46,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-12 16:16:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,747 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-12 16:16:46,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:16:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-12 16:16:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:16:46,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,748 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:16:46,749 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1258946806, now seen corresponding path program 6 times [2020-10-12 16:16:46,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216217083] [2020-10-12 16:16:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:16:46,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-10-12 16:16:46,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:16:46,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:16:46,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:46,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216217083] [2020-10-12 16:16:46,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:16:46,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420983366] [2020-10-12 16:16:46,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:16:46,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:16:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:16:46,984 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 9 states. [2020-10-12 16:16:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:47,008 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-12 16:16:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:16:47,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 16:16:47,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:47,010 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:16:47,010 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:16:47,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:16:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:16:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:16:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:16:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-12 16:16:47,015 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-12 16:16:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:47,016 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-12 16:16:47,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:16:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-12 16:16:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:16:47,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:47,017 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:47,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:16:47,018 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:47,018 INFO L82 PathProgramCache]: Analyzing trace with hash 408183082, now seen corresponding path program 7 times [2020-10-12 16:16:47,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:47,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220921071] [2020-10-12 16:16:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:16:47,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:47,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:16:47,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:16:47,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:47,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:16:47,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:47,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:47,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:47,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:47,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:47,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:47,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:47,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220921071] [2020-10-12 16:16:47,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:47,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:16:47,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218346129] [2020-10-12 16:16:47,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:16:47,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:47,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:16:47,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:16:47,261 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-10-12 16:16:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:47,286 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-12 16:16:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:16:47,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 16:16:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:47,289 INFO L225 Difference]: With dead ends: 26 [2020-10-12 16:16:47,289 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 16:16:47,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:16:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 16:16:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 16:16:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:16:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-12 16:16:47,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-12 16:16:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:47,296 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-12 16:16:47,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:16:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-12 16:16:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:16:47,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:47,298 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:47,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:16:47,298 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash -195688586, now seen corresponding path program 8 times [2020-10-12 16:16:47,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:47,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596388302] [2020-10-12 16:16:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:16:47,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:47,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-12 16:16:47,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:16:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:47,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:16:47,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:47,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:47,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:47,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:47,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:47,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:47,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:47,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596388302] [2020-10-12 16:16:47,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:47,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:16:47,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901345929] [2020-10-12 16:16:47,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:16:47,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:47,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:16:47,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:16:47,523 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2020-10-12 16:16:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:47,558 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-12 16:16:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:16:47,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-12 16:16:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:47,560 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:16:47,560 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:16:47,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:16:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:16:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:16:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:16:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-12 16:16:47,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-12 16:16:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:47,569 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-12 16:16:47,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:16:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-12 16:16:47,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:16:47,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:47,570 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:47,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:16:47,570 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:47,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1735841110, now seen corresponding path program 9 times [2020-10-12 16:16:47,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:47,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869070098] [2020-10-12 16:16:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:16:47,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:47,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:16:47,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:16:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:47,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:16:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:47,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:47,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:47,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:47,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:47,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:47,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:47,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869070098] [2020-10-12 16:16:47,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:47,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:16:47,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260197616] [2020-10-12 16:16:47,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:16:47,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:16:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:16:47,815 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 12 states. [2020-10-12 16:16:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:47,842 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-10-12 16:16:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:16:47,843 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-12 16:16:47,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:47,844 INFO L225 Difference]: With dead ends: 28 [2020-10-12 16:16:47,844 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:16:47,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:16:47,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:16:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:16:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:16:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-12 16:16:47,849 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-12 16:16:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:47,850 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-12 16:16:47,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:16:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-12 16:16:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:16:47,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:47,851 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:47,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:16:47,851 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:47,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:47,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2059038198, now seen corresponding path program 10 times [2020-10-12 16:16:47,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:47,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12550582] [2020-10-12 16:16:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:16:48,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-12 16:16:48,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:16:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:48,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:16:48,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:48,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:48,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:48,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:48,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:48,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:48,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:48,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12550582] [2020-10-12 16:16:48,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:48,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:16:48,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380734083] [2020-10-12 16:16:48,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:16:48,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:16:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:16:48,140 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 13 states. [2020-10-12 16:16:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:48,175 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-10-12 16:16:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:16:48,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-12 16:16:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:48,177 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:16:48,177 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:16:48,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:16:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:16:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-12 16:16:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:16:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-12 16:16:48,183 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2020-10-12 16:16:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:48,184 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-12 16:16:48,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:16:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-12 16:16:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:16:48,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:48,186 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:48,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:16:48,186 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash -558787542, now seen corresponding path program 11 times [2020-10-12 16:16:48,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:48,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811840143] [2020-10-12 16:16:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:16:48,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 16:16:48,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:16:48,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:48,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:16:48,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:48,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:48,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:48,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:48,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:48,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:48,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:48,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811840143] [2020-10-12 16:16:48,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:48,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:16:48,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471191225] [2020-10-12 16:16:48,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:16:48,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:16:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:16:48,491 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2020-10-12 16:16:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:48,522 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-12 16:16:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:16:48,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-10-12 16:16:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:48,524 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:16:48,524 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:16:48,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:16:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:16:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:16:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:16:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-12 16:16:48,532 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-10-12 16:16:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:48,532 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-12 16:16:48,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:16:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-12 16:16:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:16:48,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:48,534 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:48,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:16:48,534 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:48,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:48,535 INFO L82 PathProgramCache]: Analyzing trace with hash -107006858, now seen corresponding path program 12 times [2020-10-12 16:16:48,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:48,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429321435] [2020-10-12 16:16:48,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:16:48,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:48,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-12 16:16:48,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:16:48,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:48,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:16:48,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:48,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:48,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:48,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:48,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:48,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429321435] [2020-10-12 16:16:48,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:48,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:16:48,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153413624] [2020-10-12 16:16:48,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:16:48,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:16:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:16:48,900 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 15 states. [2020-10-12 16:16:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:48,930 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-12 16:16:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:16:48,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-10-12 16:16:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:48,931 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:16:48,931 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:16:48,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:16:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:16:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:16:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:16:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-12 16:16:48,935 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 23 [2020-10-12 16:16:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:48,936 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-12 16:16:48,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:16:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-12 16:16:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:16:48,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:48,937 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:48,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:16:48,937 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1013292458, now seen corresponding path program 13 times [2020-10-12 16:16:48,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:48,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387024890] [2020-10-12 16:16:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:16:49,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:49,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-12 16:16:49,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:16:49,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:49,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:16:49,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:49,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:49,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:49,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:49,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:49,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:49,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:49,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:49,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387024890] [2020-10-12 16:16:49,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:49,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:16:49,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482690491] [2020-10-12 16:16:49,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:16:49,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:49,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:16:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:16:49,300 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-10-12 16:16:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:49,333 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-12 16:16:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:16:49,334 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-12 16:16:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:49,335 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:16:49,335 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:16:49,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:16:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:16:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 16:16:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:16:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 16:16:49,339 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-10-12 16:16:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:49,339 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 16:16:49,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:16:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 16:16:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:16:49,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:49,340 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:49,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:16:49,341 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:49,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:49,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1382832886, now seen corresponding path program 14 times [2020-10-12 16:16:49,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:49,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330158163] [2020-10-12 16:16:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:16:49,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-12 16:16:49,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:16:49,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:49,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:16:49,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:49,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:49,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:49,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:49,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:49,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:49,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:49,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:49,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330158163] [2020-10-12 16:16:49,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:49,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:16:49,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004775212] [2020-10-12 16:16:49,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:16:49,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:49,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:16:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:16:49,692 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-10-12 16:16:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:49,724 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-12 16:16:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:16:49,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2020-10-12 16:16:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:49,725 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:16:49,726 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:16:49,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:16:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:16:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-12 16:16:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 16:16:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 16:16:49,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2020-10-12 16:16:49,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:49,730 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 16:16:49,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:16:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 16:16:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:16:49,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:49,731 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:49,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:16:49,732 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:49,732 INFO L82 PathProgramCache]: Analyzing trace with hash -46315734, now seen corresponding path program 15 times [2020-10-12 16:16:49,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:49,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879377818] [2020-10-12 16:16:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:16:50,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-12 16:16:50,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:16:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:16:50,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:50,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:50,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:50,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:50,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:50,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879377818] [2020-10-12 16:16:50,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:50,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:16:50,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029975310] [2020-10-12 16:16:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:16:50,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:16:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:16:50,185 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 18 states. [2020-10-12 16:16:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:50,223 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-10-12 16:16:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:16:50,224 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-12 16:16:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:50,224 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:16:50,224 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:16:50,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:16:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:16:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-12 16:16:50,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:16:50,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 16:16:50,228 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-10-12 16:16:50,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:50,229 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 16:16:50,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:16:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 16:16:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:16:50,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:50,230 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:50,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:16:50,230 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:50,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:50,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1400249994, now seen corresponding path program 16 times [2020-10-12 16:16:50,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:50,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449735237] [2020-10-12 16:16:50,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:16:50,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:50,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-12 16:16:50,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:16:50,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:50,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:16:50,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:50,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:50,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:50,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:50,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:50,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:50,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:50,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449735237] [2020-10-12 16:16:50,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:50,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:16:50,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786554666] [2020-10-12 16:16:50,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:16:50,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:50,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:16:50,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:16:50,712 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 19 states. [2020-10-12 16:16:50,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:50,748 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-12 16:16:50,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:16:50,748 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2020-10-12 16:16:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:50,749 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:16:50,749 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:16:50,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:16:50,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:16:50,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 16:16:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:16:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 16:16:50,753 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2020-10-12 16:16:50,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:50,754 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 16:16:50,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:16:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 16:16:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:16:50,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:50,755 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:50,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:16:50,755 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:50,756 INFO L82 PathProgramCache]: Analyzing trace with hash -422539094, now seen corresponding path program 17 times [2020-10-12 16:16:50,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:50,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072236716] [2020-10-12 16:16:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:16:51,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:51,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-12 16:16:51,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:16:51,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:51,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:16:51,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:51,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:51,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:51,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:51,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:51,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:51,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:51,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072236716] [2020-10-12 16:16:51,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:51,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:16:51,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635679594] [2020-10-12 16:16:51,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:16:51,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:51,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:16:51,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:16:51,265 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-10-12 16:16:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:51,304 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-12 16:16:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:16:51,305 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-12 16:16:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:51,306 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:16:51,306 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:16:51,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:16:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:16:51,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 16:16:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:16:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-12 16:16:51,310 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-10-12 16:16:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:51,310 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-12 16:16:51,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:16:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-12 16:16:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:16:51,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:51,311 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:51,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:16:51,312 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash -178272266, now seen corresponding path program 18 times [2020-10-12 16:16:51,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:51,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607728533] [2020-10-12 16:16:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:16:51,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-12 16:16:51,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:16:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:16:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:51,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:51,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:51,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:51,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:51,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:51,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:51,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607728533] [2020-10-12 16:16:51,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:51,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:16:51,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753031994] [2020-10-12 16:16:51,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:16:51,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:51,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:16:51,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:16:51,778 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 21 states. [2020-10-12 16:16:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:51,809 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-12 16:16:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:16:51,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2020-10-12 16:16:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:51,810 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:16:51,811 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:16:51,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:16:51,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:16:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 16:16:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 16:16:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-12 16:16:51,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2020-10-12 16:16:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:51,815 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-12 16:16:51,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:16:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-12 16:16:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:16:51,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:51,816 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:51,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:16:51,816 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:51,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:51,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1195935190, now seen corresponding path program 19 times [2020-10-12 16:16:51,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:51,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389716395] [2020-10-12 16:16:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:16:52,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:52,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-12 16:16:52,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:16:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:52,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:16:52,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:52,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:52,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:52,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:52,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:52,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:52,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389716395] [2020-10-12 16:16:52,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:52,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:16:52,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171983217] [2020-10-12 16:16:52,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:16:52,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:52,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:16:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:16:52,387 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 22 states. [2020-10-12 16:16:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:52,425 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-12 16:16:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:16:52,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-12 16:16:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:52,426 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:16:52,426 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:16:52,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:16:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:16:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 16:16:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:16:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-12 16:16:52,430 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-10-12 16:16:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:52,430 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-12 16:16:52,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:16:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-12 16:16:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:16:52,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:52,431 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:52,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:16:52,431 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:52,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1616252534, now seen corresponding path program 20 times [2020-10-12 16:16:52,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:52,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656898829] [2020-10-12 16:16:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:16:52,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:52,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-12 16:16:52,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:16:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:52,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:16:52,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:53,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:53,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:53,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:53,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:53,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:53,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:53,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:53,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:53,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656898829] [2020-10-12 16:16:53,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:53,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:16:53,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141531269] [2020-10-12 16:16:53,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:16:53,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:16:53,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:16:53,048 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2020-10-12 16:16:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:53,079 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-12 16:16:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:16:53,080 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2020-10-12 16:16:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:53,080 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:16:53,081 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:16:53,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:16:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:16:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:16:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:16:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 16:16:53,084 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 31 [2020-10-12 16:16:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:53,085 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 16:16:53,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:16:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 16:16:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:16:53,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:53,085 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:53,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:16:53,086 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1400241238, now seen corresponding path program 21 times [2020-10-12 16:16:53,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:53,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019580260] [2020-10-12 16:16:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:53,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:16:53,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:53,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-12 16:16:53,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:16:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:53,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:16:53,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:53,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:53,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:53,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:53,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:53,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:53,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:53,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:53,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:53,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:53,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:53,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019580260] [2020-10-12 16:16:53,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:53,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:16:53,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128709357] [2020-10-12 16:16:53,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:16:53,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:16:53,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:16:53,770 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 24 states. [2020-10-12 16:16:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:53,823 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-12 16:16:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:16:53,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-10-12 16:16:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:53,827 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:16:53,827 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:16:53,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:16:53,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:16:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 16:16:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:16:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-12 16:16:53,837 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2020-10-12 16:16:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:53,838 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-12 16:16:53,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:16:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-12 16:16:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:16:53,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:53,841 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:53,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:16:53,841 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash -422267658, now seen corresponding path program 22 times [2020-10-12 16:16:53,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:53,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670583448] [2020-10-12 16:16:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:53,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:16:54,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:54,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-12 16:16:54,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:16:54,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:54,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:16:54,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:54,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:54,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:54,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:54,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670583448] [2020-10-12 16:16:54,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:54,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:16:54,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388087504] [2020-10-12 16:16:54,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:16:54,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:16:54,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:54,500 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 25 states. [2020-10-12 16:16:54,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:54,543 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-12 16:16:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:16:54,544 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2020-10-12 16:16:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:54,544 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:16:54,544 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:16:54,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:54,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:16:54,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 16:16:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 16:16:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 16:16:54,548 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2020-10-12 16:16:54,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:54,548 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 16:16:54,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:16:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 16:16:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:16:54,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:54,549 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:54,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:16:54,549 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:54,550 INFO L82 PathProgramCache]: Analyzing trace with hash -169857750, now seen corresponding path program 23 times [2020-10-12 16:16:54,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:54,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082305046] [2020-10-12 16:16:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:16:54,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:54,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 16:16:54,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:16:54,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:54,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:16:54,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:55,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:55,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:55,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:55,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:55,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:55,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:55,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:55,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:55,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:55,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:55,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082305046] [2020-10-12 16:16:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:55,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:16:55,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493753169] [2020-10-12 16:16:55,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:16:55,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:16:55,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:16:55,242 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 26 states. [2020-10-12 16:16:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:55,301 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-12 16:16:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:16:55,302 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2020-10-12 16:16:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:55,302 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:16:55,302 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:16:55,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:16:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:16:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 16:16:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:16:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 16:16:55,306 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2020-10-12 16:16:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:55,306 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 16:16:55,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:16:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 16:16:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:16:55,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:55,307 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:55,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:16:55,307 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash -935085194, now seen corresponding path program 24 times [2020-10-12 16:16:55,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:55,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702882360] [2020-10-12 16:16:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:55,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:55,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:16:55,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:55,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-12 16:16:55,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:55,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:16:55,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:55,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:16:55,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:56,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:56,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:56,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:56,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:56,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:56,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:56,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:56,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:56,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:56,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:56,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702882360] [2020-10-12 16:16:56,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:56,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:16:56,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491006279] [2020-10-12 16:16:56,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:16:56,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:16:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:56,068 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 27 states. [2020-10-12 16:16:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:56,129 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-12 16:16:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:16:56,131 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2020-10-12 16:16:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:56,132 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:16:56,132 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:16:56,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:16:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 16:16:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:16:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 16:16:56,142 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2020-10-12 16:16:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:56,143 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 16:16:56,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:16:56,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 16:16:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:16:56,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:56,143 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:56,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:16:56,144 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:56,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:56,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1112667818, now seen corresponding path program 25 times [2020-10-12 16:16:56,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:56,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552334962] [2020-10-12 16:16:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:56,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:56,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:16:56,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:56,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-12 16:16:56,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:56,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:16:56,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:56,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:16:56,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:56,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:56,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:56,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:56,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:56,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:56,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:56,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:56,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:56,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:56,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552334962] [2020-10-12 16:16:56,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:56,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:16:56,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663565142] [2020-10-12 16:16:56,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:16:56,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:56,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:16:56,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:16:56,929 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 28 states. [2020-10-12 16:16:56,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:56,990 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-10-12 16:16:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:16:56,991 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2020-10-12 16:16:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:56,992 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:16:56,992 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:16:56,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:16:56,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:16:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 16:16:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:16:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 16:16:57,000 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2020-10-12 16:16:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:57,001 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 16:16:57,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:16:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 16:16:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 16:16:57,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:57,002 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:57,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:16:57,003 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:57,004 INFO L82 PathProgramCache]: Analyzing trace with hash 168501750, now seen corresponding path program 26 times [2020-10-12 16:16:57,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:57,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215749669] [2020-10-12 16:16:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:57,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:57,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 16:16:57,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:57,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-12 16:16:57,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:57,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:16:57,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:57,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:16:57,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:57,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:57,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:57,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:57,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215749669] [2020-10-12 16:16:57,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:57,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:16:57,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814401670] [2020-10-12 16:16:57,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:16:57,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:16:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:16:57,908 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 29 states. [2020-10-12 16:16:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:57,958 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-12 16:16:57,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:16:57,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-12 16:16:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:57,962 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:16:57,963 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:16:57,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:16:57,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:16:57,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 16:16:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 16:16:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-12 16:16:57,969 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2020-10-12 16:16:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:57,969 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-12 16:16:57,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:16:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-12 16:16:57,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:57,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:57,970 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:57,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:16:57,970 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash 964124714, now seen corresponding path program 27 times [2020-10-12 16:16:57,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:57,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584197664] [2020-10-12 16:16:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:58,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:58,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:58,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 530 [2020-10-12 16:16:58,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:16:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:58,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:16:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:59,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:59,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:59,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:59,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:59,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:59,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:59,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:59,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584197664] [2020-10-12 16:16:59,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:59,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:16:59,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684631893] [2020-10-12 16:16:59,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:16:59,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:16:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:16:59,122 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 30 states. [2020-10-12 16:16:59,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:59,170 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-10-12 16:16:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:16:59,170 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-10-12 16:16:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:59,171 INFO L225 Difference]: With dead ends: 46 [2020-10-12 16:16:59,171 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:16:59,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:16:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:16:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 16:16:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:16:59,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 16:16:59,175 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2020-10-12 16:16:59,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:59,175 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 16:16:59,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:16:59,175 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 16:16:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 16:16:59,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:59,176 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:59,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:16:59,176 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -141367178, now seen corresponding path program 28 times [2020-10-12 16:16:59,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:59,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772207921] [2020-10-12 16:16:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:59,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 16:16:59,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:59,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 483 [2020-10-12 16:16:59,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:59,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:16:59,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:59,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:16:59,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:00,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:00,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:00,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:00,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:00,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:00,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:00,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:00,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772207921] [2020-10-12 16:17:00,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:00,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:17:00,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887180548] [2020-10-12 16:17:00,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:17:00,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:17:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:17:00,176 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 31 states. [2020-10-12 16:17:00,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:00,219 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-10-12 16:17:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:17:00,220 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-10-12 16:17:00,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:00,221 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:17:00,221 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:17:00,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:17:00,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:17:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 16:17:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:17:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-12 16:17:00,224 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2020-10-12 16:17:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:00,224 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-12 16:17:00,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:17:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-12 16:17:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:17:00,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:00,225 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:00,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:17:00,225 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:00,226 INFO L82 PathProgramCache]: Analyzing trace with hash -51877462, now seen corresponding path program 29 times [2020-10-12 16:17:00,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:00,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038523680] [2020-10-12 16:17:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:00,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:17:00,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-12 16:17:00,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:00,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:17:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:17:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:01,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:01,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:01,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:01,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:01,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:01,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:01,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:01,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:01,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:01,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038523680] [2020-10-12 16:17:01,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:01,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:17:01,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232675075] [2020-10-12 16:17:01,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:17:01,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:01,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:17:01,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:17:01,264 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 32 states. [2020-10-12 16:17:01,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:01,323 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-12 16:17:01,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:17:01,326 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2020-10-12 16:17:01,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:01,326 INFO L225 Difference]: With dead ends: 48 [2020-10-12 16:17:01,327 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:17:01,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:17:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:17:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 16:17:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:17:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 16:17:01,329 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2020-10-12 16:17:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:01,330 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 16:17:01,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:17:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 16:17:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 16:17:01,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:01,330 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:01,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:17:01,331 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:01,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1572663562, now seen corresponding path program 30 times [2020-10-12 16:17:01,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:01,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235574766] [2020-10-12 16:17:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:01,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:01,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:01,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 16:17:01,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:01,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-10-12 16:17:01,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:17:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:01,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:17:01,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:02,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:02,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:02,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:02,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:02,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:02,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:02,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:02,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:02,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235574766] [2020-10-12 16:17:02,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:02,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:17:02,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197989401] [2020-10-12 16:17:02,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:17:02,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:17:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:17:02,338 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 33 states. [2020-10-12 16:17:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:02,393 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 16:17:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:17:02,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2020-10-12 16:17:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:02,395 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:17:02,395 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:17:02,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:17:02,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:17:02,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-12 16:17:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:17:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 16:17:02,402 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2020-10-12 16:17:02,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:02,402 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 16:17:02,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:17:02,403 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 16:17:02,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:17:02,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:02,403 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:02,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:17:02,404 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:02,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1472392406, now seen corresponding path program 31 times [2020-10-12 16:17:02,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:02,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363978266] [2020-10-12 16:17:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:02,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:02,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:17:02,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:02,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-12 16:17:02,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:17:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:02,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:17:02,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:03,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:03,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:03,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:03,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:03,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:03,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:03,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:03,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:03,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:03,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:03,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:03,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363978266] [2020-10-12 16:17:03,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:03,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:17:03,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145948816] [2020-10-12 16:17:03,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:17:03,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:03,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:17:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:17:03,405 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 34 states. [2020-10-12 16:17:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:03,463 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-10-12 16:17:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:17:03,464 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2020-10-12 16:17:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:03,465 INFO L225 Difference]: With dead ends: 50 [2020-10-12 16:17:03,465 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:17:03,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:17:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:17:03,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 16:17:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:17:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-12 16:17:03,471 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2020-10-12 16:17:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:03,472 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-12 16:17:03,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:17:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-12 16:17:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 16:17:03,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:03,473 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:03,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:17:03,473 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:03,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1636013430, now seen corresponding path program 32 times [2020-10-12 16:17:03,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:03,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452825370] [2020-10-12 16:17:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:03,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:03,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:03,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 16:17:03,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:03,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 378 [2020-10-12 16:17:03,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:03,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:17:03,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:03,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:17:03,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:04,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:04,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:04,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:04,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:04,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:04,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:04,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:04,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:04,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452825370] [2020-10-12 16:17:04,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:04,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:17:04,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564496127] [2020-10-12 16:17:04,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:17:04,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:04,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:17:04,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:17:04,503 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 35 states. [2020-10-12 16:17:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:04,568 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-10-12 16:17:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:17:04,569 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2020-10-12 16:17:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:04,569 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:17:04,570 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:17:04,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:17:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:17:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 16:17:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:17:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-12 16:17:04,573 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 43 [2020-10-12 16:17:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:04,573 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-12 16:17:04,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:17:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-12 16:17:04,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:17:04,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:04,574 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:04,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:17:04,575 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:04,575 INFO L82 PathProgramCache]: Analyzing trace with hash -787653462, now seen corresponding path program 33 times [2020-10-12 16:17:04,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:04,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901297655] [2020-10-12 16:17:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:04,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:04,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:05,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:17:05,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:05,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-10-12 16:17:05,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:17:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:17:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:05,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:05,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:05,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:05,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:05,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:05,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:05,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:05,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:05,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:05,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901297655] [2020-10-12 16:17:05,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:05,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:17:05,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68767059] [2020-10-12 16:17:05,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:17:05,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:05,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:17:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:17:05,748 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 36 states. [2020-10-12 16:17:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:05,805 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-10-12 16:17:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:17:05,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2020-10-12 16:17:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:05,807 INFO L225 Difference]: With dead ends: 52 [2020-10-12 16:17:05,807 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:17:05,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:17:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:17:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 16:17:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:17:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-12 16:17:05,811 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2020-10-12 16:17:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:05,811 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-12 16:17:05,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:17:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-12 16:17:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 16:17:05,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:05,812 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:05,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:17:05,812 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1388084214, now seen corresponding path program 34 times [2020-10-12 16:17:05,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:05,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800515650] [2020-10-12 16:17:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:06,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:06,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 16:17:06,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:06,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-12 16:17:06,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:17:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:06,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:17:06,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:07,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:07,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:07,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:07,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:07,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:17:07,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:07,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:07,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:07,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800515650] [2020-10-12 16:17:07,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:07,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:17:07,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449702948] [2020-10-12 16:17:07,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:17:07,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:07,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:17:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:17:07,115 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 37 states. [2020-10-12 16:17:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:07,178 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-10-12 16:17:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:17:07,178 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2020-10-12 16:17:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:07,179 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:17:07,179 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:17:07,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:17:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:17:07,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 16:17:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:17:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 16:17:07,183 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2020-10-12 16:17:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:07,183 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 16:17:07,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:17:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 16:17:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:17:07,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:07,184 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:07,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:17:07,184 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash 116475434, now seen corresponding path program 35 times [2020-10-12 16:17:07,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:07,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311591693] [2020-10-12 16:17:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:07,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:17:07,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:07,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-12 16:17:07,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:07,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:17:07,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:07,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:17:07,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:17:08,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:08,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:08,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:08,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:08,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:08,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:08,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:08,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311591693] [2020-10-12 16:17:08,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:08,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:17:08,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375608884] [2020-10-12 16:17:08,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:17:08,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:08,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:17:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:17:08,428 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 38 states. [2020-10-12 16:17:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:08,490 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-12 16:17:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:17:08,491 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2020-10-12 16:17:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:08,491 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:17:08,491 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:17:08,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:17:08,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:17:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 16:17:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:17:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-12 16:17:08,495 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2020-10-12 16:17:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:08,495 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-12 16:17:08,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:17:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-12 16:17:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 16:17:08,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:08,496 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:08,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:17:08,496 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:08,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:08,497 INFO L82 PathProgramCache]: Analyzing trace with hash -648691082, now seen corresponding path program 36 times [2020-10-12 16:17:08,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:08,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183135962] [2020-10-12 16:17:08,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:08,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:17:08,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:09,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:09,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:09,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:09,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:09,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:09,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:09,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:09,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:09,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:09,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183135962] [2020-10-12 16:17:09,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:09,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:17:09,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991379506] [2020-10-12 16:17:09,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:17:09,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:09,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:17:09,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:17:09,736 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 39 states. [2020-10-12 16:17:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:09,816 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-12 16:17:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:17:09,816 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2020-10-12 16:17:09,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:09,817 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:17:09,817 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:17:09,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:17:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:17:09,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 16:17:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:17:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-12 16:17:09,820 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 47 [2020-10-12 16:17:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:09,821 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-12 16:17:09,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:17:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-12 16:17:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:17:09,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:09,822 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:09,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:17:09,822 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1400950698, now seen corresponding path program 37 times [2020-10-12 16:17:09,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:09,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867729847] [2020-10-12 16:17:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:09,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:10,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:10,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:17:10,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:11,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:11,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:11,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:11,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:11,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:11,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:11,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:11,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:11,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:11,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867729847] [2020-10-12 16:17:11,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:11,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:17:11,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992220781] [2020-10-12 16:17:11,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:17:11,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:17:11,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:17:11,129 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 40 states. [2020-10-12 16:17:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:11,178 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-10-12 16:17:11,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:17:11,179 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2020-10-12 16:17:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:11,180 INFO L225 Difference]: With dead ends: 56 [2020-10-12 16:17:11,180 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:17:11,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:17:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:17:11,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-12 16:17:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:17:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 16:17:11,184 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2020-10-12 16:17:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:11,184 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 16:17:11,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:17:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 16:17:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 16:17:11,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:11,185 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:11,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:17:11,186 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:11,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:11,186 INFO L82 PathProgramCache]: Analyzing trace with hash 515336438, now seen corresponding path program 38 times [2020-10-12 16:17:11,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:11,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361347872] [2020-10-12 16:17:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:11,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:11,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 16:17:11,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:11,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-12 16:17:11,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:17:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:11,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:17:11,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:12,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:12,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:12,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:12,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:12,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:12,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:12,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:12,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:12,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:12,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:12,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361347872] [2020-10-12 16:17:12,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:12,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:17:12,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662087282] [2020-10-12 16:17:12,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:17:12,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:12,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:17:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:17:12,553 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 41 states. [2020-10-12 16:17:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:12,626 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-10-12 16:17:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:17:12,627 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2020-10-12 16:17:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:12,628 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:17:12,628 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:17:12,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:17:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:17:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 16:17:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 16:17:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-12 16:17:12,631 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 49 [2020-10-12 16:17:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:12,632 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-12 16:17:12,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:17:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-12 16:17:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:17:12,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:12,632 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:12,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:17:12,633 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1168901846, now seen corresponding path program 39 times [2020-10-12 16:17:12,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:12,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767517620] [2020-10-12 16:17:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:12,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:12,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:13,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:17:13,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:13,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-12 16:17:13,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:13,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:17:13,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:13,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:17:13,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:14,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:14,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:14,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:14,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:14,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:14,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:14,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:14,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:14,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:14,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:14,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767517620] [2020-10-12 16:17:14,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:14,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:17:14,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568942890] [2020-10-12 16:17:14,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:17:14,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:14,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:17:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:17:14,099 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 42 states. [2020-10-12 16:17:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:14,164 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-10-12 16:17:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:17:14,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2020-10-12 16:17:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:14,165 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:17:14,165 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:17:14,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:17:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:17:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 16:17:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:17:14,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 16:17:14,168 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2020-10-12 16:17:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:14,168 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 16:17:14,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:17:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 16:17:14,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 16:17:14,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:14,169 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:14,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:17:14,169 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1840681098, now seen corresponding path program 40 times [2020-10-12 16:17:14,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:14,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78448434] [2020-10-12 16:17:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:14,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:14,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 16:17:14,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:14,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 642 [2020-10-12 16:17:14,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:17:14,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:14,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:17:14,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:15,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:15,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:15,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:15,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78448434] [2020-10-12 16:17:15,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:15,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:17:15,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735508879] [2020-10-12 16:17:15,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:17:15,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:17:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:17:15,794 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 43 states. [2020-10-12 16:17:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:15,866 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-12 16:17:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:17:15,868 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2020-10-12 16:17:15,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:15,868 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:17:15,869 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:17:15,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:17:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:17:15,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 16:17:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:17:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-12 16:17:15,872 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2020-10-12 16:17:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:15,873 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-12 16:17:15,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:17:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-12 16:17:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:17:15,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:15,873 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:15,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:17:15,874 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1191001430, now seen corresponding path program 41 times [2020-10-12 16:17:15,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:15,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721781829] [2020-10-12 16:17:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:15,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:16,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:16,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:17:16,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-12 16:17:16,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:17:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:16,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:17:16,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:17,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:17,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:17,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:17,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:17,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:17,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:17,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:17,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:17,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721781829] [2020-10-12 16:17:17,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:17,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:17:17,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735703385] [2020-10-12 16:17:17,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:17:17,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:17,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:17:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:17:17,488 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 44 states. [2020-10-12 16:17:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:17,560 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-12 16:17:17,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:17:17,561 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 52 [2020-10-12 16:17:17,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:17,561 INFO L225 Difference]: With dead ends: 60 [2020-10-12 16:17:17,561 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:17:17,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:17:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:17:17,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 16:17:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:17:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 16:17:17,565 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-10-12 16:17:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:17,565 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 16:17:17,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:17:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 16:17:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 16:17:17,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:17,566 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:17,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:17:17,567 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1769199094, now seen corresponding path program 42 times [2020-10-12 16:17:17,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:17,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179021282] [2020-10-12 16:17:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:17,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:18,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:17:18,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:19,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:19,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:19,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:19,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:19,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:19,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179021282] [2020-10-12 16:17:19,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:19,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:17:19,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731265539] [2020-10-12 16:17:19,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:17:19,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:19,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:17:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:17:19,276 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 45 states. [2020-10-12 16:17:19,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:19,354 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-12 16:17:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:17:19,355 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 53 [2020-10-12 16:17:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:19,355 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:17:19,356 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:17:19,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:17:19,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:17:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 16:17:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 16:17:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-12 16:17:19,360 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 53 [2020-10-12 16:17:19,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:19,361 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-12 16:17:19,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:17:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-12 16:17:19,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:17:19,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:19,362 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:19,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:17:19,362 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:19,362 INFO L82 PathProgramCache]: Analyzing trace with hash -953865174, now seen corresponding path program 43 times [2020-10-12 16:17:19,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:19,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577505951] [2020-10-12 16:17:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:19,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 673 [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:17:20,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:20,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:17:20,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:21,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:21,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:21,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:21,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:21,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:21,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:21,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:21,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577505951] [2020-10-12 16:17:21,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:21,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:17:21,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489974482] [2020-10-12 16:17:21,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:17:21,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:21,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:17:21,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:17:21,158 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 46 states. [2020-10-12 16:17:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:21,218 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-12 16:17:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:17:21,219 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 54 [2020-10-12 16:17:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:21,220 INFO L225 Difference]: With dead ends: 62 [2020-10-12 16:17:21,220 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:17:21,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:17:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:17:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 16:17:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:17:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-12 16:17:21,224 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-10-12 16:17:21,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:21,225 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-12 16:17:21,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:17:21,225 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-12 16:17:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 16:17:21,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:21,225 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:21,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:17:21,226 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash 530488438, now seen corresponding path program 44 times [2020-10-12 16:17:21,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:21,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044525934] [2020-10-12 16:17:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:21,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:21,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 16:17:21,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:21,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-12 16:17:21,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:17:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:17:21,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:23,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:23,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:23,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:23,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:23,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:23,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:23,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:23,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:23,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:23,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044525934] [2020-10-12 16:17:23,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:23,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:17:23,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767216250] [2020-10-12 16:17:23,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:17:23,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:17:23,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:17:23,192 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 47 states. [2020-10-12 16:17:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:23,262 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-12 16:17:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:17:23,262 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2020-10-12 16:17:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:23,263 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:17:23,263 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:17:23,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:17:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:17:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 16:17:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:17:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 16:17:23,267 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 55 [2020-10-12 16:17:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:23,267 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 16:17:23,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:17:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 16:17:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:17:23,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:23,268 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:23,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:17:23,269 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -699189846, now seen corresponding path program 45 times [2020-10-12 16:17:23,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:23,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728417576] [2020-10-12 16:17:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:24,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:24,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:17:24,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:24,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 783 [2020-10-12 16:17:24,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:17:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:17:24,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:25,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:25,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:25,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:25,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728417576] [2020-10-12 16:17:25,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:25,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:17:25,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928978552] [2020-10-12 16:17:25,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:17:25,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:17:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:17:25,328 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 48 states. [2020-10-12 16:17:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:25,389 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-12 16:17:25,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:17:25,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-10-12 16:17:25,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:25,397 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:17:25,397 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:17:25,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:17:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:17:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 16:17:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:17:25,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 16:17:25,402 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2020-10-12 16:17:25,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:25,402 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 16:17:25,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:17:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 16:17:25,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 16:17:25,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:25,403 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:25,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:17:25,404 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash -164510986, now seen corresponding path program 46 times [2020-10-12 16:17:25,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:25,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6876784] [2020-10-12 16:17:25,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:25,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:25,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:26,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:26,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 16:17:26,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-12 16:17:26,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:17:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:17:26,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:27,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:27,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:27,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:27,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:27,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:27,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:27,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:27,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:27,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:27,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6876784] [2020-10-12 16:17:27,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:27,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:17:27,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199870095] [2020-10-12 16:17:27,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:17:27,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:17:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:17:27,443 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 49 states. [2020-10-12 16:17:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:27,505 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-12 16:17:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:17:27,506 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 57 [2020-10-12 16:17:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:27,507 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:17:27,507 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:17:27,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:17:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:17:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-12 16:17:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 16:17:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-12 16:17:27,511 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2020-10-12 16:17:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:27,511 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-12 16:17:27,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:17:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-12 16:17:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:17:27,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:27,512 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:27,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:17:27,512 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:27,513 INFO L82 PathProgramCache]: Analyzing trace with hash -769335510, now seen corresponding path program 47 times [2020-10-12 16:17:27,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:27,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950535669] [2020-10-12 16:17:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:27,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:28,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:17:28,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:28,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-12 16:17:28,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:28,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:17:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:17:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:29,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:29,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:29,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:29,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:29,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:29,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:29,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:29,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:29,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:29,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950535669] [2020-10-12 16:17:29,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:29,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:17:29,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739496149] [2020-10-12 16:17:29,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:17:29,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:29,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:17:29,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:17:29,581 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 50 states. [2020-10-12 16:17:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:29,653 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-10-12 16:17:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:17:29,653 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 58 [2020-10-12 16:17:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:29,654 INFO L225 Difference]: With dead ends: 66 [2020-10-12 16:17:29,655 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:17:29,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:17:29,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:17:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 16:17:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:17:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 16:17:29,658 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2020-10-12 16:17:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:29,659 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 16:17:29,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:17:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 16:17:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 16:17:29,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:29,660 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:29,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:17:29,660 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1955940726, now seen corresponding path program 48 times [2020-10-12 16:17:29,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:29,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846233900] [2020-10-12 16:17:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:29,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:29,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:30,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:30,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 16:17:30,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:30,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-12 16:17:30,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:30,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:17:30,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:30,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:17:30,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:32,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:32,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:32,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:32,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:32,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:32,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:32,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:32,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:32,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846233900] [2020-10-12 16:17:32,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:32,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:17:32,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814378791] [2020-10-12 16:17:32,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:17:32,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:17:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:17:32,202 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 51 states. [2020-10-12 16:17:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:32,291 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-10-12 16:17:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:17:32,291 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 59 [2020-10-12 16:17:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:32,292 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:17:32,292 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:17:32,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:17:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:17:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 16:17:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:17:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 16:17:32,296 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2020-10-12 16:17:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:32,296 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 16:17:32,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:17:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 16:17:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:17:32,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:32,297 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:32,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:17:32,297 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash 540158122, now seen corresponding path program 49 times [2020-10-12 16:17:32,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:32,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884769500] [2020-10-12 16:17:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:32,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:32,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:33,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:33,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:17:33,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 887 [2020-10-12 16:17:33,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:17:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:17:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:34,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:34,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:34,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:34,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:34,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884769500] [2020-10-12 16:17:34,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:34,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:17:34,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360153879] [2020-10-12 16:17:34,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:17:34,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:17:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:17:34,567 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 52 states. [2020-10-12 16:17:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:34,640 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-12 16:17:34,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:17:34,641 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 60 [2020-10-12 16:17:34,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:34,641 INFO L225 Difference]: With dead ends: 68 [2020-10-12 16:17:34,641 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 16:17:34,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:17:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 16:17:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 16:17:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:17:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-12 16:17:34,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2020-10-12 16:17:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:34,645 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-12 16:17:34,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:17:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-12 16:17:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 16:17:34,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:34,646 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:34,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:17:34,646 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:34,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:34,647 INFO L82 PathProgramCache]: Analyzing trace with hash -399429642, now seen corresponding path program 50 times [2020-10-12 16:17:34,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:34,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755632608] [2020-10-12 16:17:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:34,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:34,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:35,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:17:35,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:37,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:37,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:37,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:37,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:37,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755632608] [2020-10-12 16:17:37,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:37,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:17:37,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38785669] [2020-10-12 16:17:37,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:17:37,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:17:37,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:17:37,072 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 53 states. [2020-10-12 16:17:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:37,161 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2020-10-12 16:17:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:17:37,165 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 61 [2020-10-12 16:17:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:37,166 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:17:37,166 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:17:37,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:17:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:17:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 16:17:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 16:17:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-12 16:17:37,172 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 61 [2020-10-12 16:17:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:37,172 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-12 16:17:37,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:17:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-12 16:17:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:17:37,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:37,175 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:37,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:17:37,175 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash 538120746, now seen corresponding path program 51 times [2020-10-12 16:17:37,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:37,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369821553] [2020-10-12 16:17:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:37,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:17:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:37,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:17:37,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:39,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:39,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:39,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:39,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:39,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:39,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:39,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:39,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:39,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:39,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:39,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369821553] [2020-10-12 16:17:39,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:39,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:17:39,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934431436] [2020-10-12 16:17:39,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:17:39,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:17:39,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:17:39,499 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 54 states. [2020-10-12 16:17:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:39,586 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-12 16:17:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:17:39,589 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 62 [2020-10-12 16:17:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:39,589 INFO L225 Difference]: With dead ends: 70 [2020-10-12 16:17:39,590 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:17:39,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:17:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:17:39,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 16:17:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:17:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 16:17:39,593 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2020-10-12 16:17:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:39,593 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 16:17:39,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:17:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 16:17:39,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 16:17:39,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:39,594 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:39,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:17:39,595 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash -462588298, now seen corresponding path program 52 times [2020-10-12 16:17:39,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:39,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901465650] [2020-10-12 16:17:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:17:40,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:40,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:17:40,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:41,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:41,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:41,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:41,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:41,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:41,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:41,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:41,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901465650] [2020-10-12 16:17:41,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:41,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:17:41,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919400479] [2020-10-12 16:17:41,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:17:41,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:17:41,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:17:41,996 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 55 states. [2020-10-12 16:17:42,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:42,102 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-12 16:17:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:17:42,103 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 63 [2020-10-12 16:17:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:42,104 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:17:42,104 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:17:42,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:17:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:17:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 16:17:42,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:17:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 16:17:42,107 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2020-10-12 16:17:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:42,108 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 16:17:42,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:17:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 16:17:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:17:42,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:42,109 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:42,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:17:42,109 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:42,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1419797590, now seen corresponding path program 53 times [2020-10-12 16:17:42,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:42,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856874873] [2020-10-12 16:17:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:42,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:42,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:17:42,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:42,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-12 16:17:42,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:17:42,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:42,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:17:42,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:44,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:44,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:44,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:44,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:44,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:44,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:44,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:44,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:44,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:44,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:44,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:44,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856874873] [2020-10-12 16:17:44,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:44,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:17:44,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034260145] [2020-10-12 16:17:44,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:17:44,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:44,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:17:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:17:44,574 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2020-10-12 16:17:44,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:44,664 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-12 16:17:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:17:44,668 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2020-10-12 16:17:44,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:44,669 INFO L225 Difference]: With dead ends: 72 [2020-10-12 16:17:44,669 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 16:17:44,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:17:44,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 16:17:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 16:17:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:17:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-12 16:17:44,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2020-10-12 16:17:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:44,672 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-12 16:17:44,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:17:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-12 16:17:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 16:17:44,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:44,673 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:44,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:17:44,674 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1028514570, now seen corresponding path program 54 times [2020-10-12 16:17:44,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:44,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851642345] [2020-10-12 16:17:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:44,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:45,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:45,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 16:17:45,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:45,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 901 [2020-10-12 16:17:45,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:45,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:17:45,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:45,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:17:45,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:47,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:47,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:47,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:47,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:47,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:47,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:47,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:47,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:47,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:47,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:47,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851642345] [2020-10-12 16:17:47,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:47,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:17:47,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224215388] [2020-10-12 16:17:47,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:17:47,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:47,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:17:47,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:17:47,293 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 57 states. [2020-10-12 16:17:47,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:47,390 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-10-12 16:17:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:17:47,391 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 65 [2020-10-12 16:17:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:47,392 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:17:47,392 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:17:47,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:17:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:17:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-12 16:17:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 16:17:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 16:17:47,395 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 65 [2020-10-12 16:17:47,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:47,395 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 16:17:47,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:17:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 16:17:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:17:47,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:47,397 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:47,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:17:47,397 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:47,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:47,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1783642838, now seen corresponding path program 55 times [2020-10-12 16:17:47,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:47,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997847771] [2020-10-12 16:17:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:47,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:47,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:17:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:48,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:17:48,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:50,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:50,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:50,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:50,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:50,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997847771] [2020-10-12 16:17:50,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:50,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:17:50,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361106713] [2020-10-12 16:17:50,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:17:50,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:17:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:17:50,105 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 58 states. [2020-10-12 16:17:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:50,209 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-12 16:17:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:17:50,210 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 66 [2020-10-12 16:17:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:50,210 INFO L225 Difference]: With dead ends: 74 [2020-10-12 16:17:50,210 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:17:50,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:17:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:17:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-12 16:17:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:17:50,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 16:17:50,213 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2020-10-12 16:17:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:50,213 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 16:17:50,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:17:50,214 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 16:17:50,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 16:17:50,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:50,215 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:50,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:17:50,215 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:50,215 INFO L82 PathProgramCache]: Analyzing trace with hash 577184630, now seen corresponding path program 56 times [2020-10-12 16:17:50,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:50,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538559311] [2020-10-12 16:17:50,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:50,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:50,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:50,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:51,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:17:51,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:52,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:52,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:52,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:52,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:52,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:52,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:52,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:52,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:52,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:52,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:52,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:52,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538559311] [2020-10-12 16:17:52,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:52,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:17:52,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431304475] [2020-10-12 16:17:52,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:17:52,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:52,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:17:52,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:17:52,953 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 59 states. [2020-10-12 16:17:53,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:53,059 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2020-10-12 16:17:53,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:17:53,060 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 67 [2020-10-12 16:17:53,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:53,061 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:17:53,061 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:17:53,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:17:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:17:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 16:17:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:17:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-12 16:17:53,064 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2020-10-12 16:17:53,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:53,064 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-12 16:17:53,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:17:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-12 16:17:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:17:53,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:53,065 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:53,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:17:53,066 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:53,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash 748392106, now seen corresponding path program 57 times [2020-10-12 16:17:53,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:53,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202712443] [2020-10-12 16:17:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:53,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:53,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:54,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1010 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:17:54,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:55,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:55,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:55,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:55,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:55,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:55,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:55,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:55,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:55,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202712443] [2020-10-12 16:17:55,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:55,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:17:55,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298788233] [2020-10-12 16:17:55,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:17:55,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:55,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:17:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:17:55,934 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 60 states. [2020-10-12 16:17:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:56,042 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-10-12 16:17:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:17:56,047 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 68 [2020-10-12 16:17:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:56,048 INFO L225 Difference]: With dead ends: 76 [2020-10-12 16:17:56,048 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 16:17:56,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:17:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 16:17:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 16:17:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:17:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-12 16:17:56,052 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2020-10-12 16:17:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:56,052 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-12 16:17:56,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:17:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-12 16:17:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 16:17:56,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:56,053 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:56,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:17:56,053 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:56,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1760856566, now seen corresponding path program 58 times [2020-10-12 16:17:56,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:56,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733107865] [2020-10-12 16:17:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:56,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:56,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:57,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:57,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 16:17:57,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:57,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1061 [2020-10-12 16:17:57,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:17:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:57,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:17:57,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:59,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:59,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:59,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:59,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:59,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:59,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:59,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:59,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733107865] [2020-10-12 16:17:59,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:59,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:17:59,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633919017] [2020-10-12 16:17:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:17:59,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:17:59,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:17:59,113 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 61 states. [2020-10-12 16:17:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:59,204 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2020-10-12 16:17:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:17:59,204 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 69 [2020-10-12 16:17:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:59,205 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:17:59,205 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:17:59,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:17:59,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:17:59,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 16:17:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 16:17:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 16:17:59,208 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2020-10-12 16:17:59,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:59,208 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 16:17:59,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:17:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 16:17:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:17:59,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:59,209 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:59,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:17:59,209 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:59,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1212483542, now seen corresponding path program 59 times [2020-10-12 16:17:59,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:59,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718195538] [2020-10-12 16:17:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:59,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:59,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:00,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:00,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:18:00,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:00,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-12 16:18:00,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:00,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:18:00,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:00,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:18:00,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:02,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:02,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:02,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:02,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:02,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:02,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:02,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:02,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:02,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:02,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718195538] [2020-10-12 16:18:02,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:02,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:18:02,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609888199] [2020-10-12 16:18:02,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:18:02,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:18:02,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:18:02,743 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 62 states. [2020-10-12 16:18:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:02,859 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-12 16:18:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:18:02,860 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 70 [2020-10-12 16:18:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:02,861 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:18:02,861 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:18:02,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:18:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:18:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 16:18:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:18:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-12 16:18:02,863 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2020-10-12 16:18:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:02,863 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-12 16:18:02,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:18:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-12 16:18:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 16:18:02,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:02,864 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:02,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:18:02,864 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:02,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1103253622, now seen corresponding path program 60 times [2020-10-12 16:18:02,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:02,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334626558] [2020-10-12 16:18:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:02,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:02,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:04,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1140 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:18:04,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:06,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:06,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:06,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:06,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:06,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:06,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:06,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:06,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:06,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:06,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:06,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:06,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334626558] [2020-10-12 16:18:06,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:06,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:18:06,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784863279] [2020-10-12 16:18:06,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:18:06,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:18:06,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:18:06,062 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 63 states. [2020-10-12 16:18:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:06,176 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-12 16:18:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:18:06,177 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 71 [2020-10-12 16:18:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:06,178 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:18:06,178 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 16:18:06,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:18:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 16:18:06,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-12 16:18:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:18:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-10-12 16:18:06,181 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 71 [2020-10-12 16:18:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:06,182 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-10-12 16:18:06,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:18:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-10-12 16:18:06,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:18:06,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:06,183 INFO L422 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:06,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:18:06,183 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:06,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:06,183 INFO L82 PathProgramCache]: Analyzing trace with hash -123338326, now seen corresponding path program 61 times [2020-10-12 16:18:06,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:06,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425404883] [2020-10-12 16:18:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:06,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:06,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:06,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:07,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:07,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:18:07,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:07,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-12 16:18:07,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:18:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 16:18:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:09,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:09,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:09,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:09,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:09,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425404883] [2020-10-12 16:18:09,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:09,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:18:09,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615504230] [2020-10-12 16:18:09,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:18:09,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:18:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:18:09,450 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 64 states. [2020-10-12 16:18:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:09,600 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-10-12 16:18:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 16:18:09,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 72 [2020-10-12 16:18:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:09,602 INFO L225 Difference]: With dead ends: 80 [2020-10-12 16:18:09,602 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:18:09,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:18:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:18:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-12 16:18:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:18:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-12 16:18:09,606 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2020-10-12 16:18:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:09,606 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-12 16:18:09,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:18:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-12 16:18:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 16:18:09,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:09,607 INFO L422 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:09,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:18:09,607 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash 507016950, now seen corresponding path program 62 times [2020-10-12 16:18:09,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:09,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872310465] [2020-10-12 16:18:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:09,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:10,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:10,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 16:18:10,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:10,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1250 [2020-10-12 16:18:10,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:10,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:18:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:10,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:18:10,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:13,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:13,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:13,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:13,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872310465] [2020-10-12 16:18:13,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:13,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:18:13,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155820668] [2020-10-12 16:18:13,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:18:13,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:18:13,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:18:13,195 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 65 states. [2020-10-12 16:18:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:13,308 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-12 16:18:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:18:13,309 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 73 [2020-10-12 16:18:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:13,309 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:18:13,309 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:18:13,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:18:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:18:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-12 16:18:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 16:18:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 16:18:13,312 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 73 [2020-10-12 16:18:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:13,312 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 16:18:13,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:18:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 16:18:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:18:13,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:13,313 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:13,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:18:13,313 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1426805974, now seen corresponding path program 63 times [2020-10-12 16:18:13,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:13,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197311072] [2020-10-12 16:18:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:13,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:13,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:14,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:14,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:18:14,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:16,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:16,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:16,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:16,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:16,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:16,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:16,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:16,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:16,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:16,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:16,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197311072] [2020-10-12 16:18:16,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:16,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:18:16,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381323247] [2020-10-12 16:18:16,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:18:16,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:16,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:18:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:18:16,950 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 66 states. [2020-10-12 16:18:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:17,055 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-12 16:18:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 16:18:17,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 74 [2020-10-12 16:18:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:17,056 INFO L225 Difference]: With dead ends: 82 [2020-10-12 16:18:17,056 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 16:18:17,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:18:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 16:18:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-12 16:18:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 16:18:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2020-10-12 16:18:17,060 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2020-10-12 16:18:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:17,060 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2020-10-12 16:18:17,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:18:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2020-10-12 16:18:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 16:18:17,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:17,061 INFO L422 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:17,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:18:17,061 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1245774474, now seen corresponding path program 64 times [2020-10-12 16:18:17,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:17,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419968279] [2020-10-12 16:18:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:17,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:17,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1332 [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:18:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:20,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:20,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:20,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:20,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:20,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:20,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:20,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:20,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:20,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:20,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:20,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419968279] [2020-10-12 16:18:20,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:20,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:18:20,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065047140] [2020-10-12 16:18:20,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:18:20,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:18:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:18:20,764 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 67 states. [2020-10-12 16:18:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:20,867 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2020-10-12 16:18:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 16:18:20,867 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 75 [2020-10-12 16:18:20,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:20,868 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:18:20,868 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 16:18:20,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:18:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 16:18:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-12 16:18:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:18:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-12 16:18:20,870 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2020-10-12 16:18:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:20,870 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-12 16:18:20,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 16:18:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-12 16:18:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:18:20,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:20,871 INFO L422 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:20,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:18:20,871 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 71234730, now seen corresponding path program 65 times [2020-10-12 16:18:20,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:20,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015772203] [2020-10-12 16:18:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:21,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:22,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:22,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:18:22,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:22,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-12 16:18:22,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:22,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 16:18:22,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:22,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 16:18:22,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:24,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:24,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:24,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:24,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:24,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:24,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:24,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:24,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:24,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:24,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015772203] [2020-10-12 16:18:24,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:24,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 16:18:24,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254947914] [2020-10-12 16:18:24,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 16:18:24,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:24,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 16:18:24,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:18:24,705 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 68 states. [2020-10-12 16:18:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:24,797 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-12 16:18:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 16:18:24,798 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 76 [2020-10-12 16:18:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:24,799 INFO L225 Difference]: With dead ends: 84 [2020-10-12 16:18:24,799 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:18:24,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:18:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:18:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-12 16:18:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:18:24,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-12 16:18:24,804 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2020-10-12 16:18:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:24,804 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-12 16:18:24,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 16:18:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-12 16:18:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 16:18:24,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:24,805 INFO L422 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:24,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:18:24,806 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2051152906, now seen corresponding path program 66 times [2020-10-12 16:18:24,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:24,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631772432] [2020-10-12 16:18:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:24,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:26,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:26,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 16:18:26,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:26,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1346 [2020-10-12 16:18:26,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:26,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 16:18:26,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:26,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:18:26,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:28,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:28,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:28,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:28,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:28,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631772432] [2020-10-12 16:18:28,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:28,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 16:18:28,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540604651] [2020-10-12 16:18:28,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 16:18:28,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 16:18:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:18:28,778 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 69 states. [2020-10-12 16:18:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:28,870 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-12 16:18:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 16:18:28,870 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 77 [2020-10-12 16:18:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:28,871 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:18:28,871 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 16:18:28,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:18:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 16:18:28,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-12 16:18:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:18:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 16:18:28,875 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 77 [2020-10-12 16:18:28,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:28,875 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 16:18:28,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 16:18:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 16:18:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:18:28,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:28,876 INFO L422 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:28,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:18:28,876 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 874307114, now seen corresponding path program 67 times [2020-10-12 16:18:28,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:28,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350176310] [2020-10-12 16:18:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:28,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:30,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1475 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:18:30,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:33,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:33,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:33,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:33,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350176310] [2020-10-12 16:18:33,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:33,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 16:18:33,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462498552] [2020-10-12 16:18:33,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 16:18:33,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:33,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 16:18:33,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:18:33,029 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 70 states. [2020-10-12 16:18:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:33,139 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2020-10-12 16:18:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:18:33,140 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 78 [2020-10-12 16:18:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:33,141 INFO L225 Difference]: With dead ends: 86 [2020-10-12 16:18:33,141 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:18:33,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:18:33,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:18:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-12 16:18:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:18:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-12 16:18:33,145 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2020-10-12 16:18:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:33,146 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-12 16:18:33,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 16:18:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-12 16:18:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 16:18:33,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:33,146 INFO L422 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:33,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:18:33,147 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:33,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:33,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1369254518, now seen corresponding path program 68 times [2020-10-12 16:18:33,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:33,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61524882] [2020-10-12 16:18:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:33,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:33,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:34,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:34,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 16:18:34,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1556 [2020-10-12 16:18:34,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:18:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:34,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:18:34,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:37,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:37,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:37,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:37,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:37,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:37,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61524882] [2020-10-12 16:18:37,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:37,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 16:18:37,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846016961] [2020-10-12 16:18:37,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 16:18:37,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 16:18:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:18:37,544 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 71 states. [2020-10-12 16:18:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:37,649 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2020-10-12 16:18:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 16:18:37,649 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 79 [2020-10-12 16:18:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:37,650 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:18:37,650 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:18:37,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:18:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:18:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-12 16:18:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:18:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-12 16:18:37,653 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 79 [2020-10-12 16:18:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:37,653 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-12 16:18:37,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 16:18:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-12 16:18:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:18:37,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:37,654 INFO L422 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:37,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:18:37,655 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash -467245142, now seen corresponding path program 69 times [2020-10-12 16:18:37,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:37,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190322893] [2020-10-12 16:18:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:37,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:39,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:39,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:18:39,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:39,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1855 [2020-10-12 16:18:39,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:39,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 16:18:39,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:39,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 16:18:39,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:42,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:42,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190322893] [2020-10-12 16:18:42,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:42,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 16:18:42,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584326355] [2020-10-12 16:18:42,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 16:18:42,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:42,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 16:18:42,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:18:42,477 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 72 states. [2020-10-12 16:18:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:42,589 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-12 16:18:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 16:18:42,590 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 80 [2020-10-12 16:18:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:42,591 INFO L225 Difference]: With dead ends: 88 [2020-10-12 16:18:42,591 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:18:42,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:18:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:18:42,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-12 16:18:42,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:18:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 16:18:42,594 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2020-10-12 16:18:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:42,594 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 16:18:42,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 16:18:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 16:18:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 16:18:42,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:42,595 INFO L422 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:42,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:18:42,596 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1564159754, now seen corresponding path program 70 times [2020-10-12 16:18:42,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:42,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769205809] [2020-10-12 16:18:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:42,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:44,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1828 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:18:44,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:47,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:47,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:47,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:47,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:47,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:47,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769205809] [2020-10-12 16:18:47,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:47,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 16:18:47,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426640629] [2020-10-12 16:18:47,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 16:18:47,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:47,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 16:18:47,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:18:47,482 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 73 states. [2020-10-12 16:18:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:47,614 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-12 16:18:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 16:18:47,615 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 81 [2020-10-12 16:18:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:47,616 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:18:47,616 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:18:47,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:18:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:18:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-12 16:18:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 16:18:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-10-12 16:18:47,621 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2020-10-12 16:18:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:47,622 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-10-12 16:18:47,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 16:18:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-10-12 16:18:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:18:47,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:47,623 INFO L422 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:47,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:18:47,623 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:47,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1208774358, now seen corresponding path program 71 times [2020-10-12 16:18:47,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:47,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109555749] [2020-10-12 16:18:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:50,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2610 [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:50,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 16:18:50,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:53,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:53,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:53,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:53,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:53,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:53,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:53,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:53,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:53,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:53,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109555749] [2020-10-12 16:18:53,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:53,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 16:18:53,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135591804] [2020-10-12 16:18:53,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 16:18:53,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 16:18:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:53,381 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 74 states. [2020-10-12 16:18:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:53,508 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-10-12 16:18:53,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:18:53,509 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 82 [2020-10-12 16:18:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:53,510 INFO L225 Difference]: With dead ends: 90 [2020-10-12 16:18:53,510 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:18:53,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:18:53,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-12 16:18:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:18:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-12 16:18:53,514 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2020-10-12 16:18:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:53,514 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-12 16:18:53,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 16:18:53,514 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-12 16:18:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 16:18:53,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:53,515 INFO L422 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:53,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:18:53,515 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1218238326, now seen corresponding path program 72 times [2020-10-12 16:18:53,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:53,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954787682] [2020-10-12 16:18:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:53,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:53,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:55,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1934 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:18:55,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:58,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:58,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:58,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:58,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:58,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:58,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:58,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:58,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:58,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:58,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:58,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954787682] [2020-10-12 16:18:58,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:58,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 16:18:58,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541362900] [2020-10-12 16:18:58,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 16:18:58,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 16:18:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:58,675 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 75 states. [2020-10-12 16:18:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:58,804 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2020-10-12 16:18:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 16:18:58,805 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 83 [2020-10-12 16:18:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:58,806 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:18:58,806 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:18:58,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:18:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-12 16:18:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 16:18:58,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-12 16:18:58,809 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 83 [2020-10-12 16:18:58,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:58,809 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-12 16:18:58,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 16:18:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-12 16:18:58,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:18:58,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:58,810 INFO L422 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:58,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:18:58,811 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:58,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:58,811 INFO L82 PathProgramCache]: Analyzing trace with hash -853779798, now seen corresponding path program 73 times [2020-10-12 16:18:58,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:58,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742258058] [2020-10-12 16:18:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:58,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1937 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 16:19:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:04,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:04,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:04,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742258058] [2020-10-12 16:19:04,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:04,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 16:19:04,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104611319] [2020-10-12 16:19:04,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 16:19:04,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 16:19:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:19:04,070 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 76 states. [2020-10-12 16:19:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:04,218 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-10-12 16:19:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:19:04,219 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 84 [2020-10-12 16:19:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:04,220 INFO L225 Difference]: With dead ends: 92 [2020-10-12 16:19:04,220 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:19:04,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:19:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:19:04,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-12 16:19:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:19:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-12 16:19:04,223 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2020-10-12 16:19:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:04,223 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-12 16:19:04,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 16:19:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-12 16:19:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 16:19:04,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:04,224 INFO L422 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:04,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:19:04,224 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:04,225 INFO L82 PathProgramCache]: Analyzing trace with hash -661832202, now seen corresponding path program 74 times [2020-10-12 16:19:04,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:04,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723517275] [2020-10-12 16:19:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:04,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:04,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:06,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:06,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-12 16:19:06,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:06,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1862 [2020-10-12 16:19:06,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 16:19:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:06,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:19:06,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:09,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:09,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:09,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:09,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:09,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:09,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:09,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:09,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:09,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723517275] [2020-10-12 16:19:09,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:09,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-12 16:19:09,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998777687] [2020-10-12 16:19:09,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-12 16:19:09,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:09,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-12 16:19:09,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:19:09,496 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 77 states. [2020-10-12 16:19:09,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:09,660 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2020-10-12 16:19:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-12 16:19:09,661 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 85 [2020-10-12 16:19:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:09,662 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:19:09,662 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:19:09,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:19:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:19:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 16:19:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 16:19:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-12 16:19:09,666 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2020-10-12 16:19:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:09,666 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-12 16:19:09,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-12 16:19:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-12 16:19:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:19:09,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:09,667 INFO L422 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:09,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 16:19:09,668 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:09,668 INFO L82 PathProgramCache]: Analyzing trace with hash 993575978, now seen corresponding path program 75 times [2020-10-12 16:19:09,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:09,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183760273] [2020-10-12 16:19:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:09,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:09,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:11,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:11,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:19:11,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:11,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2104 [2020-10-12 16:19:11,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-12 16:19:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:11,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:19:11,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:15,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:15,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:15,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:15,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183760273] [2020-10-12 16:19:15,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:15,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-12 16:19:15,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318380698] [2020-10-12 16:19:15,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-12 16:19:15,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-12 16:19:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:19:15,295 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 78 states. [2020-10-12 16:19:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:15,460 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-12 16:19:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 16:19:15,462 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 86 [2020-10-12 16:19:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:15,463 INFO L225 Difference]: With dead ends: 94 [2020-10-12 16:19:15,463 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:19:15,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:19:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:19:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-12 16:19:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:19:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2020-10-12 16:19:15,465 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2020-10-12 16:19:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:15,465 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2020-10-12 16:19:15,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-12 16:19:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2020-10-12 16:19:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-12 16:19:15,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:15,466 INFO L422 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:15,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 16:19:15,467 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash 771622006, now seen corresponding path program 76 times [2020-10-12 16:19:15,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:15,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726823089] [2020-10-12 16:19:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:15,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:17,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:19:17,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:21,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:21,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:21,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:21,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:21,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:21,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:21,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:21,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:21,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:21,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:21,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726823089] [2020-10-12 16:19:21,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:21,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-12 16:19:21,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740221111] [2020-10-12 16:19:21,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-12 16:19:21,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:21,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-12 16:19:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:19:21,077 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 79 states. [2020-10-12 16:19:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:21,243 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2020-10-12 16:19:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 16:19:21,244 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 87 [2020-10-12 16:19:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:21,244 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:19:21,245 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 16:19:21,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:19:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 16:19:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-12 16:19:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 16:19:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-12 16:19:21,247 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2020-10-12 16:19:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:21,248 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-12 16:19:21,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-12 16:19:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-12 16:19:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:19:21,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:21,249 INFO L422 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:21,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 16:19:21,249 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:21,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:21,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1813983830, now seen corresponding path program 77 times [2020-10-12 16:19:21,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:21,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848387553] [2020-10-12 16:19:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:21,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:21,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2234 [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 16:19:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:27,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:27,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:27,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:27,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848387553] [2020-10-12 16:19:27,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:27,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-12 16:19:27,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321636697] [2020-10-12 16:19:27,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-12 16:19:27,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-12 16:19:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:19:27,145 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 80 states. [2020-10-12 16:19:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:27,260 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-10-12 16:19:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-12 16:19:27,260 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 88 [2020-10-12 16:19:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:27,261 INFO L225 Difference]: With dead ends: 96 [2020-10-12 16:19:27,261 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:19:27,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:19:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:19:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-12 16:19:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:19:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-12 16:19:27,264 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2020-10-12 16:19:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:27,264 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-12 16:19:27,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-12 16:19:27,264 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-12 16:19:27,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 16:19:27,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:27,265 INFO L422 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:27,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 16:19:27,265 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:27,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash -363386122, now seen corresponding path program 78 times [2020-10-12 16:19:27,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:27,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727739290] [2020-10-12 16:19:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:29,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:29,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 16:19:29,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2170 [2020-10-12 16:19:29,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-12 16:19:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:29,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:19:29,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:33,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:33,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:33,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727739290] [2020-10-12 16:19:33,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:33,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-12 16:19:33,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300704752] [2020-10-12 16:19:33,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-12 16:19:33,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:33,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-12 16:19:33,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:19:33,316 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 81 states. [2020-10-12 16:19:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:33,472 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2020-10-12 16:19:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-12 16:19:33,472 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 89 [2020-10-12 16:19:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:33,473 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:19:33,473 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:19:33,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:19:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:19:33,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-12 16:19:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 16:19:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2020-10-12 16:19:33,476 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 89 [2020-10-12 16:19:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:33,476 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2020-10-12 16:19:33,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-12 16:19:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2020-10-12 16:19:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:19:33,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:33,477 INFO L422 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:33,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 16:19:33,478 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1655469866, now seen corresponding path program 79 times [2020-10-12 16:19:33,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:33,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693202960] [2020-10-12 16:19:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:33,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:33,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:35,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2241 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 16:19:35,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:39,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:39,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:39,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:39,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:39,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:39,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:39,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:39,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693202960] [2020-10-12 16:19:39,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:39,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-12 16:19:39,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700939164] [2020-10-12 16:19:39,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-12 16:19:39,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:39,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-12 16:19:39,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:19:39,590 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand 82 states. [2020-10-12 16:19:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:39,760 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-12 16:19:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 16:19:39,761 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 90 [2020-10-12 16:19:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:39,761 INFO L225 Difference]: With dead ends: 98 [2020-10-12 16:19:39,761 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:19:39,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:19:39,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:19:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-12 16:19:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:19:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2020-10-12 16:19:39,763 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2020-10-12 16:19:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:39,764 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2020-10-12 16:19:39,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-12 16:19:39,764 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2020-10-12 16:19:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 16:19:39,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:39,764 INFO L422 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:39,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 16:19:39,764 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash -184503946, now seen corresponding path program 80 times [2020-10-12 16:19:39,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:39,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522253797] [2020-10-12 16:19:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:39,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:39,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2480 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:19:42,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:46,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:46,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:46,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:46,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:46,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:46,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:46,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:46,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:46,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:46,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:46,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522253797] [2020-10-12 16:19:46,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:46,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-12 16:19:46,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603030605] [2020-10-12 16:19:46,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-12 16:19:46,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-12 16:19:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:19:46,201 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 83 states. [2020-10-12 16:19:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:46,368 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-12 16:19:46,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-12 16:19:46,368 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 91 [2020-10-12 16:19:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:46,369 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:19:46,369 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:19:46,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:19:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:19:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 16:19:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 16:19:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-12 16:19:46,372 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 91 [2020-10-12 16:19:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:46,372 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-12 16:19:46,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-12 16:19:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-12 16:19:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:19:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:46,373 INFO L422 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:46,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 16:19:46,373 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1389117270, now seen corresponding path program 81 times [2020-10-12 16:19:46,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:46,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309471592] [2020-10-12 16:19:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:46,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:48,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2383 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 16:19:48,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:52,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:52,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:52,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:52,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:52,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309471592] [2020-10-12 16:19:52,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:52,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-12 16:19:52,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611555187] [2020-10-12 16:19:52,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-12 16:19:52,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-12 16:19:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 16:19:52,922 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 84 states. [2020-10-12 16:19:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:53,066 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2020-10-12 16:19:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-12 16:19:53,066 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 92 [2020-10-12 16:19:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:53,067 INFO L225 Difference]: With dead ends: 100 [2020-10-12 16:19:53,067 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 16:19:53,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 16:19:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 16:19:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-12 16:19:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:19:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-12 16:19:53,070 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2020-10-12 16:19:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:53,071 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-12 16:19:53,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-12 16:19:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-12 16:19:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 16:19:53,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:53,071 INFO L422 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:53,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-12 16:19:53,072 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash -77424650, now seen corresponding path program 82 times [2020-10-12 16:19:53,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:53,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048122340] [2020-10-12 16:19:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:53,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2464 [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-12 16:19:55,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:55,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 16:19:55,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:59,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:59,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:59,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:59,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:59,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:59,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:59,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:59,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:59,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048122340] [2020-10-12 16:19:59,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:59,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-12 16:19:59,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106216662] [2020-10-12 16:19:59,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-12 16:19:59,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:59,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-12 16:19:59,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:19:59,762 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 85 states. [2020-10-12 16:19:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:59,955 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-10-12 16:19:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-12 16:19:59,956 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 93 [2020-10-12 16:19:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:59,956 INFO L225 Difference]: With dead ends: 101 [2020-10-12 16:19:59,956 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:19:59,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:19:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:19:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-12 16:19:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 16:19:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-10-12 16:19:59,959 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2020-10-12 16:19:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:59,959 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-10-12 16:19:59,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-12 16:19:59,959 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-10-12 16:19:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:19:59,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:59,960 INFO L422 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:59,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-12 16:19:59,960 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:59,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1930340906, now seen corresponding path program 83 times [2020-10-12 16:19:59,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:59,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982088294] [2020-10-12 16:19:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:59,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:00,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:02,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2503 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 16:20:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:07,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:07,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:07,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:07,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:07,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:07,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:07,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:07,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:07,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982088294] [2020-10-12 16:20:07,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:07,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-12 16:20:07,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025423937] [2020-10-12 16:20:07,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-12 16:20:07,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-12 16:20:07,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:20:07,023 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 86 states. [2020-10-12 16:20:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:07,236 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-10-12 16:20:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-12 16:20:07,237 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 94 [2020-10-12 16:20:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:07,237 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:20:07,237 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:20:07,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:20:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:20:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-12 16:20:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:20:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-10-12 16:20:07,240 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2020-10-12 16:20:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:07,241 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-10-12 16:20:07,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-12 16:20:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-10-12 16:20:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 16:20:07,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:07,242 INFO L422 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:07,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-12 16:20:07,242 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:07,242 INFO L82 PathProgramCache]: Analyzing trace with hash -253436298, now seen corresponding path program 84 times [2020-10-12 16:20:07,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:07,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339929395] [2020-10-12 16:20:07,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:07,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:07,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2529 [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-12 16:20:09,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:09,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:20:09,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:14,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:14,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:14,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:14,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:14,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:14,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:14,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:14,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339929395] [2020-10-12 16:20:14,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:14,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-12 16:20:14,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910029524] [2020-10-12 16:20:14,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-12 16:20:14,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-12 16:20:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:20:14,227 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 87 states. [2020-10-12 16:20:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:14,372 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-12 16:20:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-12 16:20:14,372 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 95 [2020-10-12 16:20:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:14,373 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:20:14,373 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 16:20:14,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:20:14,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 16:20:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-12 16:20:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:20:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-12 16:20:14,376 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 95 [2020-10-12 16:20:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:14,376 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-12 16:20:14,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-12 16:20:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-12 16:20:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:20:14,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:14,378 INFO L422 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:14,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-12 16:20:14,378 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:14,378 INFO L82 PathProgramCache]: Analyzing trace with hash 768947114, now seen corresponding path program 85 times [2020-10-12 16:20:14,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:14,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113542005] [2020-10-12 16:20:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:16,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:16,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:20:16,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:16,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2570 [2020-10-12 16:20:16,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-12 16:20:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 16:20:16,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:21,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:21,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:21,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:21,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:21,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:21,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:21,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:21,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:21,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:21,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113542005] [2020-10-12 16:20:21,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:21,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-12 16:20:21,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103038960] [2020-10-12 16:20:21,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-12 16:20:21,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-12 16:20:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 16:20:21,564 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 88 states. [2020-10-12 16:20:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:21,783 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-12 16:20:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-12 16:20:21,790 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 96 [2020-10-12 16:20:21,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:21,791 INFO L225 Difference]: With dead ends: 104 [2020-10-12 16:20:21,791 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 16:20:21,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 16:20:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 16:20:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-12 16:20:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 16:20:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-12 16:20:21,795 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2020-10-12 16:20:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:21,795 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-12 16:20:21,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-12 16:20:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-12 16:20:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 16:20:21,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:21,796 INFO L422 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:21,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-12 16:20:21,796 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1896905482, now seen corresponding path program 86 times [2020-10-12 16:20:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:21,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337086492] [2020-10-12 16:20:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:21,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:21,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:24,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:24,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 16:20:24,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:24,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2776 [2020-10-12 16:20:24,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:24,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-12 16:20:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:24,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:20:24,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:29,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:29,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:29,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:29,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:29,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:29,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337086492] [2020-10-12 16:20:29,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:29,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-12 16:20:29,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994964322] [2020-10-12 16:20:29,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-12 16:20:29,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:29,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-12 16:20:29,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:20:29,565 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 89 states. [2020-10-12 16:20:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:29,717 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2020-10-12 16:20:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-12 16:20:29,718 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 97 [2020-10-12 16:20:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:29,718 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:20:29,718 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:20:29,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:20:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:20:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-12 16:20:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 16:20:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-10-12 16:20:29,722 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 97 [2020-10-12 16:20:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:29,722 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-10-12 16:20:29,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-12 16:20:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-10-12 16:20:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 16:20:29,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:29,723 INFO L422 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:29,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-12 16:20:29,723 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:29,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1361009962, now seen corresponding path program 87 times [2020-10-12 16:20:29,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:29,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752264188] [2020-10-12 16:20:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:29,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2841 [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 89 [2020-10-12 16:20:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:32,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:20:32,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:37,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:37,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:37,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:37,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:37,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:37,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:37,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:37,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:37,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:37,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:37,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752264188] [2020-10-12 16:20:37,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:37,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-12 16:20:37,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658011111] [2020-10-12 16:20:37,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-12 16:20:37,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-12 16:20:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:20:37,577 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 90 states. [2020-10-12 16:20:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:37,793 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-12 16:20:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-12 16:20:37,794 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 98 [2020-10-12 16:20:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:37,794 INFO L225 Difference]: With dead ends: 106 [2020-10-12 16:20:37,794 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 16:20:37,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:20:37,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 16:20:37,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-12 16:20:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:20:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2020-10-12 16:20:37,797 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2020-10-12 16:20:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:37,797 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2020-10-12 16:20:37,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-12 16:20:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2020-10-12 16:20:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 16:20:37,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:37,798 INFO L422 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:37,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-12 16:20:37,798 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash -722826378, now seen corresponding path program 88 times [2020-10-12 16:20:37,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:37,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358430404] [2020-10-12 16:20:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:37,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:37,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:40,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2881 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 90 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 16:20:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0