/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 17:51:37,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 17:51:37,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 17:51:37,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 17:51:37,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 17:51:37,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 17:51:37,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 17:51:37,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 17:51:37,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 17:51:37,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 17:51:37,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 17:51:37,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 17:51:37,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 17:51:37,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 17:51:37,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 17:51:37,412 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 17:51:37,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 17:51:37,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 17:51:37,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 17:51:37,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 17:51:37,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 17:51:37,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 17:51:37,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 17:51:37,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 17:51:37,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 17:51:37,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 17:51:37,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 17:51:37,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 17:51:37,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 17:51:37,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 17:51:37,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 17:51:37,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 17:51:37,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 17:51:37,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 17:51:37,441 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 17:51:37,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 17:51:37,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 17:51:37,442 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 17:51:37,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 17:51:37,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 17:51:37,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 17:51:37,445 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 [2020-10-14 17:51:37,485 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 17:51:37,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 17:51:37,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 17:51:37,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 17:51:37,487 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 17:51:37,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 17:51:37,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 17:51:37,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 17:51:37,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 17:51:37,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 17:51:37,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 17:51:37,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 17:51:37,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 17:51:37,488 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 17:51:37,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 17:51:37,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 17:51:37,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 17:51:37,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 17:51:37,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 17:51:37,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 17:51:37,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 17:51:37,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 17:51:37,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 17:51:37,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 17:51:37,490 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 17:51:37,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 17:51:37,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 17:51:37,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 17:51:37,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 17:51:37,491 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 17:51:37,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 17:51:37,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 17:51:37,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 17:51:37,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 17:51:37,803 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 17:51:37,804 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-14 17:51:37,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4354873ea/ffb897d251b54fdf818631392eccd00e/FLAG48d26953a [2020-10-14 17:51:38,310 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 17:51:38,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2020-10-14 17:51:38,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4354873ea/ffb897d251b54fdf818631392eccd00e/FLAG48d26953a [2020-10-14 17:51:38,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4354873ea/ffb897d251b54fdf818631392eccd00e [2020-10-14 17:51:38,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 17:51:38,726 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 17:51:38,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:38,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 17:51:38,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 17:51:38,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:38,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b5b388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38, skipping insertion in model container [2020-10-14 17:51:38,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:38,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 17:51:38,758 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 17:51:38,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:38,951 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 17:51:38,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 17:51:38,995 INFO L208 MainTranslator]: Completed translation [2020-10-14 17:51:38,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38 WrapperNode [2020-10-14 17:51:38,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 17:51:38,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 17:51:38,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 17:51:38,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 17:51:39,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (1/1) ... [2020-10-14 17:51:39,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 17:51:39,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 17:51:39,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 17:51:39,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 17:51:39,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (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 [2020-10-14 17:51:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 17:51:39,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 17:51:39,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 17:51:39,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 17:51:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 17:51:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 17:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 17:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 17:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 17:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 17:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 17:51:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 17:51:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 17:51:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 17:51:39,530 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 17:51:39,530 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-14 17:51:39,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:39 BoogieIcfgContainer [2020-10-14 17:51:39,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 17:51:39,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 17:51:39,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 17:51:39,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 17:51:39,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:51:38" (1/3) ... [2020-10-14 17:51:39,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbd87e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:39, skipping insertion in model container [2020-10-14 17:51:39,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:51:38" (2/3) ... [2020-10-14 17:51:39,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbd87e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:51:39, skipping insertion in model container [2020-10-14 17:51:39,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:51:39" (3/3) ... [2020-10-14 17:51:39,543 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2020-10-14 17:51:39,553 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 17:51:39,560 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 17:51:39,574 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 17:51:39,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 17:51:39,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 17:51:39,601 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 17:51:39,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 17:51:39,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 17:51:39,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 17:51:39,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 17:51:39,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 17:51:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-14 17:51:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 17:51:39,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:39,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:39,626 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1010407240, now seen corresponding path program 1 times [2020-10-14 17:51:39,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:39,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443245998] [2020-10-14 17:51:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:39,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:39,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:39,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:39,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:40,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:40,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 17:51:40,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:51:40,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-14 17:51:40,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:40,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 17:51:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:51:40,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 17:51:40,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 17:51:40,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:40,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:40,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:40,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:40,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:40,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:51:40,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:40,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:40,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:40,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:40,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:40,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443245998] [2020-10-14 17:51:40,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 17:51:40,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 17:51:40,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135297626] [2020-10-14 17:51:40,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 17:51:40,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:40,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 17:51:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:40,879 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-14 17:51:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:41,044 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2020-10-14 17:51:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 17:51:41,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 17:51:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:41,056 INFO L225 Difference]: With dead ends: 72 [2020-10-14 17:51:41,056 INFO L226 Difference]: Without dead ends: 39 [2020-10-14 17:51:41,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 17:51:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-14 17:51:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-14 17:51:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 17:51:41,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 17:51:41,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2020-10-14 17:51:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:41,104 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 17:51:41,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 17:51:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 17:51:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 17:51:41,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:41,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:41,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 17:51:41,107 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1377677638, now seen corresponding path program 1 times [2020-10-14 17:51:41,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:41,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897773243] [2020-10-14 17:51:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:41,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:41,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:41,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:41,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:41,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:43,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:46,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:46,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 17:51:46,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:46,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4918 [2020-10-14 17:51:46,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:46,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:51:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 17:51:46,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 17:51:47,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:47,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:47,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:47,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:47,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:47,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:47,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:47,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:47,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:47,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:47,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:47,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:47,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897773243] [2020-10-14 17:51:47,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:47,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:51:47,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142444502] [2020-10-14 17:51:47,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:51:47,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:47,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:51:47,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:51:47,072 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 17 states. [2020-10-14 17:51:47,459 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-14 17:51:47,727 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-14 17:51:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:48,425 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-14 17:51:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:51:48,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-14 17:51:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:48,430 INFO L225 Difference]: With dead ends: 67 [2020-10-14 17:51:48,430 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 17:51:48,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:51:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 17:51:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2020-10-14 17:51:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 17:51:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-14 17:51:48,450 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 29 [2020-10-14 17:51:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:48,451 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-14 17:51:48,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:51:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-14 17:51:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 17:51:48,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:48,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:48,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 17:51:48,454 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:48,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:48,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1068329768, now seen corresponding path program 2 times [2020-10-14 17:51:48,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:48,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599884826] [2020-10-14 17:51:48,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:48,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:48,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:53,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:53,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 17:51:53,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:51:53,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:51:53,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:53,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:51:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:51:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 17:51:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:54,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:51:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:54,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:54,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:51:54,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:51:54,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:51:54,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:51:54,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:51:54,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:51:54,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:51:54,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:51:54,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:51:54,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:51:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:51:54,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599884826] [2020-10-14 17:51:54,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:51:54,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:51:54,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678240917] [2020-10-14 17:51:54,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:51:54,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:51:54,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:51:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:51:54,250 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 17 states. [2020-10-14 17:51:55,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:51:55,342 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-10-14 17:51:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:51:55,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-10-14 17:51:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:51:55,346 INFO L225 Difference]: With dead ends: 80 [2020-10-14 17:51:55,346 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 17:51:55,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:51:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 17:51:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2020-10-14 17:51:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 17:51:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 17:51:55,360 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 31 [2020-10-14 17:51:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:51:55,360 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 17:51:55,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:51:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 17:51:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 17:51:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:51:55,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:51:55,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 17:51:55,362 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:51:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:51:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash -137770122, now seen corresponding path program 3 times [2020-10-14 17:51:55,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:51:55,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153743850] [2020-10-14 17:51:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:51:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:51:55,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:55,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:51:58,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:00,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:00,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 17:52:00,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 17:52:00,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:00,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:00,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:52:00,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:52:00,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 17:52:00,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:01,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:01,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:01,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:01,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:01,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:01,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:01,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:01,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:01,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:01,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:01,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:01,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:52:01,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153743850] [2020-10-14 17:52:01,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:01,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:52:01,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814721999] [2020-10-14 17:52:01,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:52:01,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:52:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:52:01,115 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 18 states. [2020-10-14 17:52:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:02,448 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-14 17:52:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:52:02,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-14 17:52:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:02,451 INFO L225 Difference]: With dead ends: 86 [2020-10-14 17:52:02,451 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 17:52:02,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=1157, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:52:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 17:52:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 48. [2020-10-14 17:52:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 17:52:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-14 17:52:02,467 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 33 [2020-10-14 17:52:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:02,467 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-14 17:52:02,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:52:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-14 17:52:02,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 17:52:02,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:02,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:02,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 17:52:02,469 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 776852116, now seen corresponding path program 4 times [2020-10-14 17:52:02,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:02,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55363244] [2020-10-14 17:52:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:02,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:07,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:07,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 17:52:07,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:07,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 17:52:07,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:07,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:52:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:52:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 17:52:07,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:07,856 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-14 17:52:08,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:08,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:08,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:08,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:08,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:08,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:08,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:08,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:08,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:08,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 17:52:08,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55363244] [2020-10-14 17:52:08,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:08,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:52:08,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573958191] [2020-10-14 17:52:08,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:52:08,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:52:08,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:52:08,635 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 19 states. [2020-10-14 17:52:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:10,513 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-10-14 17:52:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:52:10,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-14 17:52:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:10,519 INFO L225 Difference]: With dead ends: 92 [2020-10-14 17:52:10,519 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 17:52:10,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=409, Invalid=1397, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 17:52:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 17:52:10,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 50. [2020-10-14 17:52:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 17:52:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-14 17:52:10,537 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 35 [2020-10-14 17:52:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:10,538 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-14 17:52:10,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:52:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-14 17:52:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-14 17:52:10,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:10,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:10,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 17:52:10,540 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1321065201, now seen corresponding path program 1 times [2020-10-14 17:52:10,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:10,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429867995] [2020-10-14 17:52:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:10,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:10,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 17:52:12,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:12,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2045 [2020-10-14 17:52:12,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 17:52:12,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 17:52:12,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 17:52:12,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:12,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:12,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:12,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:12,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:12,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:12,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:12,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:12,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-14 17:52:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:12,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:12,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:12,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:12,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:12,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:12,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 17:52:12,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429867995] [2020-10-14 17:52:12,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:12,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 17:52:12,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110239324] [2020-10-14 17:52:12,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 17:52:12,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 17:52:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:52:12,629 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 5 states. [2020-10-14 17:52:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:12,755 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2020-10-14 17:52:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 17:52:12,756 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-10-14 17:52:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:12,757 INFO L225 Difference]: With dead ends: 97 [2020-10-14 17:52:12,757 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 17:52:12,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 17:52:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 17:52:12,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-14 17:52:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-14 17:52:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-14 17:52:12,770 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 37 [2020-10-14 17:52:12,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:12,770 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-14 17:52:12,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 17:52:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-14 17:52:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 17:52:12,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:12,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:12,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 17:52:12,773 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2000136820, now seen corresponding path program 5 times [2020-10-14 17:52:12,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:12,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184998806] [2020-10-14 17:52:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:12,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:13,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:17,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:17,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 17:52:17,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 17:52:17,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:52:17,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:17,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:52:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 17:52:17,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 17:52:17,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:18,195 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 45 [2020-10-14 17:52:18,499 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2020-10-14 17:52:19,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:19,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:19,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:19,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:19,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:19,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 17:52:19,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:19,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:19,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:19,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:19,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:19,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 17:52:19,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184998806] [2020-10-14 17:52:19,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:19,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:52:19,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507127325] [2020-10-14 17:52:19,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:52:19,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:52:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:52:19,597 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 24 states. [2020-10-14 17:52:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:22,014 INFO L93 Difference]: Finished difference Result 100 states and 119 transitions. [2020-10-14 17:52:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:52:22,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2020-10-14 17:52:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:22,017 INFO L225 Difference]: With dead ends: 100 [2020-10-14 17:52:22,017 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 17:52:22,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 17:52:22,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 17:52:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2020-10-14 17:52:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 17:52:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-14 17:52:22,032 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 43 [2020-10-14 17:52:22,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:22,032 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-14 17:52:22,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:52:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-14 17:52:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 17:52:22,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:22,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:22,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 17:52:22,034 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:22,035 INFO L82 PathProgramCache]: Analyzing trace with hash -190611479, now seen corresponding path program 2 times [2020-10-14 17:52:22,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:22,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311513138] [2020-10-14 17:52:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:22,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:22,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:22,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:27,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 17:52:27,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 17:52:27,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:27,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:27,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:27,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:27,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:27,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:27,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:27,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:27,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:27,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-14 17:52:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:27,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:27,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 17:52:27,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:27,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 17:52:27,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:27,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 17:52:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:27,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 17:52:27,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311513138] [2020-10-14 17:52:27,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:27,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 17:52:27,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647804729] [2020-10-14 17:52:27,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 17:52:27,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:27,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 17:52:27,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:27,091 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 6 states. [2020-10-14 17:52:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:27,247 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-10-14 17:52:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 17:52:27,248 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-14 17:52:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:27,250 INFO L225 Difference]: With dead ends: 111 [2020-10-14 17:52:27,250 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 17:52:27,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 17:52:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 17:52:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-14 17:52:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 17:52:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-14 17:52:27,281 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 45 [2020-10-14 17:52:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:27,281 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-14 17:52:27,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 17:52:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-14 17:52:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 17:52:27,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:27,286 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:27,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 17:52:27,286 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:27,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1014644604, now seen corresponding path program 6 times [2020-10-14 17:52:27,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:27,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533468927] [2020-10-14 17:52:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:27,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:27,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:28,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 17:52:32,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:32,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:32,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:32,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:32,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:32,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:32,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:32,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 17:52:32,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533468927] [2020-10-14 17:52:32,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:32,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 17:52:32,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820767473] [2020-10-14 17:52:32,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 17:52:32,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 17:52:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:32,379 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 10 states. [2020-10-14 17:52:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:32,633 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-10-14 17:52:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 17:52:32,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-14 17:52:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:32,635 INFO L225 Difference]: With dead ends: 135 [2020-10-14 17:52:32,636 INFO L226 Difference]: Without dead ends: 87 [2020-10-14 17:52:32,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 17:52:32,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-14 17:52:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-10-14 17:52:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 17:52:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-14 17:52:32,653 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 51 [2020-10-14 17:52:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:32,653 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-14 17:52:32,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 17:52:32,654 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-14 17:52:32,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 17:52:32,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:32,655 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:32,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 17:52:32,655 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash -180054902, now seen corresponding path program 7 times [2020-10-14 17:52:32,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:32,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840540052] [2020-10-14 17:52:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:32,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:37,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:37,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 17:52:37,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:37,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:52:37,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:37,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:37,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 17:52:37,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:52:37,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 17:52:37,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:37,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:37,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:37,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:37,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:37,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:37,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:52:37,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:37,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:37,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-14 17:52:37,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840540052] [2020-10-14 17:52:37,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:37,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 17:52:37,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573721734] [2020-10-14 17:52:37,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 17:52:37,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 17:52:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:37,780 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 11 states. [2020-10-14 17:52:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:38,022 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-10-14 17:52:38,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 17:52:38,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-14 17:52:38,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:38,024 INFO L225 Difference]: With dead ends: 154 [2020-10-14 17:52:38,024 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 17:52:38,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 17:52:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 17:52:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2020-10-14 17:52:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 17:52:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2020-10-14 17:52:38,042 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 77 [2020-10-14 17:52:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:38,042 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2020-10-14 17:52:38,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 17:52:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2020-10-14 17:52:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-14 17:52:38,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:38,044 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:38,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 17:52:38,044 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -524803710, now seen corresponding path program 8 times [2020-10-14 17:52:38,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:38,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329852075] [2020-10-14 17:52:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:38,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:38,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:43,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-14 17:52:43,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:43,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 17:52:43,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:43,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 17:52:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 17:52:43,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 17:52:43,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:43,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:43,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:43,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:43,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:43,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:43,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:43,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:43,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:43,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-14 17:52:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329852075] [2020-10-14 17:52:43,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:43,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 17:52:43,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549400265] [2020-10-14 17:52:43,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 17:52:43,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 17:52:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:43,173 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand 12 states. [2020-10-14 17:52:43,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:43,450 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2020-10-14 17:52:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 17:52:43,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-14 17:52:43,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:43,454 INFO L225 Difference]: With dead ends: 168 [2020-10-14 17:52:43,455 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 17:52:43,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 17:52:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 17:52:43,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2020-10-14 17:52:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 17:52:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-10-14 17:52:43,474 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 85 [2020-10-14 17:52:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:43,474 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-10-14 17:52:43,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 17:52:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-10-14 17:52:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 17:52:43,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:43,476 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:43,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 17:52:43,476 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2010343814, now seen corresponding path program 9 times [2020-10-14 17:52:43,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:43,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871158549] [2020-10-14 17:52:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:43,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:43,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:48,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 17:52:48,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 17:52:48,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:48,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:48,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:48,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:48,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:48,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:48,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:48,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:48,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:48,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:48,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:48,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-14 17:52:48,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871158549] [2020-10-14 17:52:48,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:48,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 17:52:48,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228077894] [2020-10-14 17:52:48,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 17:52:48,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:48,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 17:52:48,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:48,638 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 13 states. [2020-10-14 17:52:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:48,906 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2020-10-14 17:52:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 17:52:48,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-10-14 17:52:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:48,908 INFO L225 Difference]: With dead ends: 182 [2020-10-14 17:52:48,908 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 17:52:48,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 17:52:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 17:52:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-10-14 17:52:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 17:52:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2020-10-14 17:52:48,927 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 93 [2020-10-14 17:52:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:48,927 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2020-10-14 17:52:48,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 17:52:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2020-10-14 17:52:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 17:52:48,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:48,929 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:48,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 17:52:48,930 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:48,930 INFO L82 PathProgramCache]: Analyzing trace with hash -947260558, now seen corresponding path program 10 times [2020-10-14 17:52:48,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:48,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985130726] [2020-10-14 17:52:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:48,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:53,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:53,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-14 17:52:53,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:53,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 17:52:53,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:53,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 17:52:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 17:52:53,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 17:52:53,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:54,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:54,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:54,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:54,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:54,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:54,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:54,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:54,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:54,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:54,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:52:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-14 17:52:54,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985130726] [2020-10-14 17:52:54,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:54,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 17:52:54,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61733224] [2020-10-14 17:52:54,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 17:52:54,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:54,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 17:52:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:54,117 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 14 states. [2020-10-14 17:52:54,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:52:54,446 INFO L93 Difference]: Finished difference Result 196 states and 208 transitions. [2020-10-14 17:52:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 17:52:54,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 101 [2020-10-14 17:52:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:52:54,449 INFO L225 Difference]: With dead ends: 196 [2020-10-14 17:52:54,449 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 17:52:54,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 17:52:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 17:52:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-10-14 17:52:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 17:52:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2020-10-14 17:52:54,466 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 101 [2020-10-14 17:52:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:52:54,466 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2020-10-14 17:52:54,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 17:52:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2020-10-14 17:52:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-14 17:52:54,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:52:54,468 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:52:54,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 17:52:54,468 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:52:54,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:52:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2068301718, now seen corresponding path program 11 times [2020-10-14 17:52:54,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:52:54,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230471721] [2020-10-14 17:52:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:52:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:54,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:59,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 17:52:59,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:59,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:52:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:52:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:52:59,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:52:59,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:52:59,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:52:59,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:52:59,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:52:59,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:52:59,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:52:59,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:52:59,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:52:59,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:52:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-14 17:52:59,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230471721] [2020-10-14 17:52:59,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:52:59,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 17:52:59,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669726203] [2020-10-14 17:52:59,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 17:52:59,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:52:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 17:52:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:52:59,662 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand 15 states. [2020-10-14 17:53:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:00,013 INFO L93 Difference]: Finished difference Result 210 states and 222 transitions. [2020-10-14 17:53:00,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 17:53:00,013 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-10-14 17:53:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:00,015 INFO L225 Difference]: With dead ends: 210 [2020-10-14 17:53:00,015 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 17:53:00,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 17:53:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 17:53:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2020-10-14 17:53:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 17:53:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2020-10-14 17:53:00,035 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 109 [2020-10-14 17:53:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:00,035 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2020-10-14 17:53:00,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 17:53:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2020-10-14 17:53:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 17:53:00,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:00,036 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:00,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 17:53:00,036 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:00,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:00,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1348508318, now seen corresponding path program 12 times [2020-10-14 17:53:00,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:00,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163604346] [2020-10-14 17:53:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:00,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:00,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:00,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:05,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 17:53:05,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:05,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-14 17:53:05,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:05,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 17:53:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-14 17:53:05,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 17:53:05,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:05,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:05,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:05,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:05,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:05,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-10-14 17:53:05,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163604346] [2020-10-14 17:53:05,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:05,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 17:53:05,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477758260] [2020-10-14 17:53:05,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 17:53:05,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 17:53:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:53:05,258 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 16 states. [2020-10-14 17:53:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:05,639 INFO L93 Difference]: Finished difference Result 224 states and 236 transitions. [2020-10-14 17:53:05,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 17:53:05,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 117 [2020-10-14 17:53:05,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:05,641 INFO L225 Difference]: With dead ends: 224 [2020-10-14 17:53:05,641 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 17:53:05,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 17:53:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 17:53:05,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2020-10-14 17:53:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 17:53:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2020-10-14 17:53:05,664 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 117 [2020-10-14 17:53:05,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:05,664 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2020-10-14 17:53:05,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 17:53:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2020-10-14 17:53:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-14 17:53:05,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:05,666 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:05,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 17:53:05,666 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1109883482, now seen corresponding path program 13 times [2020-10-14 17:53:05,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:05,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506660661] [2020-10-14 17:53:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:05,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 17:53:10,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 17:53:10,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 17:53:10,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:10,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:10,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:10,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:10,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:10,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:10,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-14 17:53:10,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506660661] [2020-10-14 17:53:10,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:10,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 17:53:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6565382] [2020-10-14 17:53:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 17:53:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 17:53:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:10,907 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand 17 states. [2020-10-14 17:53:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:11,301 INFO L93 Difference]: Finished difference Result 238 states and 250 transitions. [2020-10-14 17:53:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 17:53:11,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 125 [2020-10-14 17:53:11,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:11,303 INFO L225 Difference]: With dead ends: 238 [2020-10-14 17:53:11,303 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 17:53:11,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 17:53:11,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 17:53:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2020-10-14 17:53:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 17:53:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2020-10-14 17:53:11,324 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 125 [2020-10-14 17:53:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:11,324 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2020-10-14 17:53:11,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 17:53:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2020-10-14 17:53:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-14 17:53:11,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:11,326 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:11,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 17:53:11,327 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1077442386, now seen corresponding path program 14 times [2020-10-14 17:53:11,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:11,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52547448] [2020-10-14 17:53:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:11,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:11,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:16,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:16,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-14 17:53:16,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:16,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-14 17:53:16,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:16,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 17:53:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:53:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 17:53:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:16,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:16,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:16,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:16,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:16,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-14 17:53:16,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52547448] [2020-10-14 17:53:16,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:16,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 17:53:16,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811887778] [2020-10-14 17:53:16,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 17:53:16,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 17:53:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:16,585 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand 18 states. [2020-10-14 17:53:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:17,015 INFO L93 Difference]: Finished difference Result 252 states and 264 transitions. [2020-10-14 17:53:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 17:53:17,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2020-10-14 17:53:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:17,017 INFO L225 Difference]: With dead ends: 252 [2020-10-14 17:53:17,017 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 17:53:17,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 17:53:17,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 17:53:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-10-14 17:53:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 17:53:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 152 transitions. [2020-10-14 17:53:17,040 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 152 transitions. Word has length 133 [2020-10-14 17:53:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:17,040 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 152 transitions. [2020-10-14 17:53:17,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 17:53:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 152 transitions. [2020-10-14 17:53:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 17:53:17,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:17,042 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:17,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 17:53:17,042 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:17,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1212523446, now seen corresponding path program 15 times [2020-10-14 17:53:17,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:17,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891357551] [2020-10-14 17:53:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:17,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 17:53:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-14 17:53:22,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:22,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:22,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 17:53:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 17:53:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 17:53:22,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:22,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:22,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:22,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:22,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:22,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:22,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:22,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:22,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:22,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:22,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:22,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-14 17:53:22,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891357551] [2020-10-14 17:53:22,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:22,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 17:53:22,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414068393] [2020-10-14 17:53:22,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 17:53:22,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:22,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 17:53:22,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:22,364 INFO L87 Difference]: Start difference. First operand 147 states and 152 transitions. Second operand 19 states. [2020-10-14 17:53:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:22,747 INFO L93 Difference]: Finished difference Result 266 states and 278 transitions. [2020-10-14 17:53:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 17:53:22,748 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2020-10-14 17:53:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:22,750 INFO L225 Difference]: With dead ends: 266 [2020-10-14 17:53:22,750 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 17:53:22,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 17:53:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 17:53:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2020-10-14 17:53:22,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 17:53:22,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 160 transitions. [2020-10-14 17:53:22,769 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 160 transitions. Word has length 141 [2020-10-14 17:53:22,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:22,769 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 160 transitions. [2020-10-14 17:53:22,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 17:53:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 160 transitions. [2020-10-14 17:53:22,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-14 17:53:22,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:22,771 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:22,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 17:53:22,771 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1063966398, now seen corresponding path program 16 times [2020-10-14 17:53:22,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:22,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584270481] [2020-10-14 17:53:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:22,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:27,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:27,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-14 17:53:27,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 17:53:27,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:28,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:28,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:28,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:28,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:28,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-14 17:53:28,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584270481] [2020-10-14 17:53:28,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:28,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 17:53:28,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645823601] [2020-10-14 17:53:28,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 17:53:28,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:28,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 17:53:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:28,077 INFO L87 Difference]: Start difference. First operand 155 states and 160 transitions. Second operand 20 states. [2020-10-14 17:53:28,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:28,511 INFO L93 Difference]: Finished difference Result 280 states and 292 transitions. [2020-10-14 17:53:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 17:53:28,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 149 [2020-10-14 17:53:28,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:28,513 INFO L225 Difference]: With dead ends: 280 [2020-10-14 17:53:28,514 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 17:53:28,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 17:53:28,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 17:53:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2020-10-14 17:53:28,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 17:53:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2020-10-14 17:53:28,533 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 149 [2020-10-14 17:53:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:28,533 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2020-10-14 17:53:28,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 17:53:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2020-10-14 17:53:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-14 17:53:28,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:28,535 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:28,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 17:53:28,535 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:28,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:28,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2091966010, now seen corresponding path program 17 times [2020-10-14 17:53:28,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:28,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760234072] [2020-10-14 17:53:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:28,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:28,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:28,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:33,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-14 17:53:33,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:33,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 17:53:33,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:33,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 17:53:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 17:53:33,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 17:53:33,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:33,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:33,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:33,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:33,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:33,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:33,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:33,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:33,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:33,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:33,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-14 17:53:33,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760234072] [2020-10-14 17:53:33,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:33,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 17:53:33,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347478271] [2020-10-14 17:53:33,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 17:53:33,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:33,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 17:53:33,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:33,865 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand 21 states. [2020-10-14 17:53:34,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:34,374 INFO L93 Difference]: Finished difference Result 294 states and 306 transitions. [2020-10-14 17:53:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 17:53:34,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 157 [2020-10-14 17:53:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:34,377 INFO L225 Difference]: With dead ends: 294 [2020-10-14 17:53:34,377 INFO L226 Difference]: Without dead ends: 175 [2020-10-14 17:53:34,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 17:53:34,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-14 17:53:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2020-10-14 17:53:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-14 17:53:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 176 transitions. [2020-10-14 17:53:34,399 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 176 transitions. Word has length 157 [2020-10-14 17:53:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:34,399 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 176 transitions. [2020-10-14 17:53:34,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 17:53:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 176 transitions. [2020-10-14 17:53:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 17:53:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:34,401 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:34,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 17:53:34,401 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 401963826, now seen corresponding path program 18 times [2020-10-14 17:53:34,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:34,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279251761] [2020-10-14 17:53:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:34,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:34,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 17:53:39,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 17:53:39,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 17:53:39,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:39,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:39,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:39,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:39,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:39,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:39,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-14 17:53:39,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279251761] [2020-10-14 17:53:39,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:39,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 17:53:39,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242217615] [2020-10-14 17:53:39,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 17:53:39,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:39,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 17:53:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:39,746 INFO L87 Difference]: Start difference. First operand 171 states and 176 transitions. Second operand 22 states. [2020-10-14 17:53:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:40,334 INFO L93 Difference]: Finished difference Result 308 states and 320 transitions. [2020-10-14 17:53:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 17:53:40,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 165 [2020-10-14 17:53:40,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:40,337 INFO L225 Difference]: With dead ends: 308 [2020-10-14 17:53:40,338 INFO L226 Difference]: Without dead ends: 183 [2020-10-14 17:53:40,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 17:53:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-14 17:53:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2020-10-14 17:53:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-14 17:53:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 184 transitions. [2020-10-14 17:53:40,368 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 184 transitions. Word has length 165 [2020-10-14 17:53:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:40,369 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 184 transitions. [2020-10-14 17:53:40,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 17:53:40,369 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 184 transitions. [2020-10-14 17:53:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-14 17:53:40,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:40,371 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:40,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 17:53:40,371 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:40,372 INFO L82 PathProgramCache]: Analyzing trace with hash -934608854, now seen corresponding path program 19 times [2020-10-14 17:53:40,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:40,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653130941] [2020-10-14 17:53:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:40,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:40,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:45,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-14 17:53:45,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:45,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 17:53:45,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:45,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:45,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 17:53:45,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-14 17:53:45,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 17:53:45,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:45,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:45,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:45,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:45,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:45,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:45,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:45,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-14 17:53:45,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653130941] [2020-10-14 17:53:45,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:45,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 17:53:45,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145883158] [2020-10-14 17:53:45,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 17:53:45,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 17:53:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:45,765 INFO L87 Difference]: Start difference. First operand 179 states and 184 transitions. Second operand 23 states. [2020-10-14 17:53:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:46,275 INFO L93 Difference]: Finished difference Result 322 states and 334 transitions. [2020-10-14 17:53:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 17:53:46,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2020-10-14 17:53:46,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:46,280 INFO L225 Difference]: With dead ends: 322 [2020-10-14 17:53:46,280 INFO L226 Difference]: Without dead ends: 191 [2020-10-14 17:53:46,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 17:53:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-14 17:53:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2020-10-14 17:53:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-14 17:53:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 192 transitions. [2020-10-14 17:53:46,308 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 192 transitions. Word has length 173 [2020-10-14 17:53:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:46,308 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 192 transitions. [2020-10-14 17:53:46,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 17:53:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 192 transitions. [2020-10-14 17:53:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-14 17:53:46,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:46,310 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:46,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 17:53:46,310 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash -845583070, now seen corresponding path program 20 times [2020-10-14 17:53:46,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:46,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636196982] [2020-10-14 17:53:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:46,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:46,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:46,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:51,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-14 17:53:51,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:51,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-14 17:53:51,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:51,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 17:53:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 17:53:51,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 17:53:51,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:51,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:51,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:51,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:51,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:51,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:51,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:51,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:51,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:51,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:53:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-14 17:53:51,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636196982] [2020-10-14 17:53:51,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:51,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 17:53:51,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189921100] [2020-10-14 17:53:51,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 17:53:51,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 17:53:51,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:51,826 INFO L87 Difference]: Start difference. First operand 187 states and 192 transitions. Second operand 24 states. [2020-10-14 17:53:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:52,593 INFO L93 Difference]: Finished difference Result 336 states and 348 transitions. [2020-10-14 17:53:52,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 17:53:52,594 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 181 [2020-10-14 17:53:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:52,596 INFO L225 Difference]: With dead ends: 336 [2020-10-14 17:53:52,596 INFO L226 Difference]: Without dead ends: 199 [2020-10-14 17:53:52,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 17:53:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-14 17:53:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2020-10-14 17:53:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-14 17:53:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 200 transitions. [2020-10-14 17:53:52,640 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 200 transitions. Word has length 181 [2020-10-14 17:53:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:52,640 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 200 transitions. [2020-10-14 17:53:52,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 17:53:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 200 transitions. [2020-10-14 17:53:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-14 17:53:52,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:52,642 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:52,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 17:53:52,642 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:52,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1908982298, now seen corresponding path program 21 times [2020-10-14 17:53:52,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:52,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144322069] [2020-10-14 17:53:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:52,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:52,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:57,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:57,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-14 17:53:57,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 17:53:57,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:58,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:53:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:53:58,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:53:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:53:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-14 17:53:58,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144322069] [2020-10-14 17:53:58,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:53:58,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 17:53:58,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447442441] [2020-10-14 17:53:58,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 17:53:58,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:53:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 17:53:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:58,087 INFO L87 Difference]: Start difference. First operand 195 states and 200 transitions. Second operand 25 states. [2020-10-14 17:53:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:53:58,679 INFO L93 Difference]: Finished difference Result 350 states and 362 transitions. [2020-10-14 17:53:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 17:53:58,679 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 189 [2020-10-14 17:53:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:53:58,681 INFO L225 Difference]: With dead ends: 350 [2020-10-14 17:53:58,681 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 17:53:58,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 17:53:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 17:53:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2020-10-14 17:53:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-14 17:53:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 208 transitions. [2020-10-14 17:53:58,730 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 208 transitions. Word has length 189 [2020-10-14 17:53:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:53:58,730 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 208 transitions. [2020-10-14 17:53:58,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 17:53:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 208 transitions. [2020-10-14 17:53:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-14 17:53:58,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:53:58,733 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:53:58,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 17:53:58,743 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:53:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:53:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash 146865938, now seen corresponding path program 22 times [2020-10-14 17:53:58,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:53:58,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337077399] [2020-10-14 17:53:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:53:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:53:58,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:53:58,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:03,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:03,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 17:54:03,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:04,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:04,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:04,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:04,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:04,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:04,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:04,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:04,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:04,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-14 17:54:04,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337077399] [2020-10-14 17:54:04,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:04,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 17:54:04,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182634720] [2020-10-14 17:54:04,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 17:54:04,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:04,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 17:54:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:04,324 INFO L87 Difference]: Start difference. First operand 203 states and 208 transitions. Second operand 26 states. [2020-10-14 17:54:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:05,180 INFO L93 Difference]: Finished difference Result 364 states and 376 transitions. [2020-10-14 17:54:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 17:54:05,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 197 [2020-10-14 17:54:05,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:05,183 INFO L225 Difference]: With dead ends: 364 [2020-10-14 17:54:05,183 INFO L226 Difference]: Without dead ends: 215 [2020-10-14 17:54:05,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 17:54:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-14 17:54:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2020-10-14 17:54:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-14 17:54:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 216 transitions. [2020-10-14 17:54:05,230 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 216 transitions. Word has length 197 [2020-10-14 17:54:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:05,230 INFO L479 AbstractCegarLoop]: Abstraction has 211 states and 216 transitions. [2020-10-14 17:54:05,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 17:54:05,231 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 216 transitions. [2020-10-14 17:54:05,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-14 17:54:05,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:05,232 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:05,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 17:54:05,233 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash -261479414, now seen corresponding path program 23 times [2020-10-14 17:54:05,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:05,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646932364] [2020-10-14 17:54:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:05,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:05,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:10,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:10,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-14 17:54:10,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:54:10,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5160 [2020-10-14 17:54:10,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:10,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 17:54:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:10,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 17:54:10,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:10,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:10,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:10,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:10,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:10,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:10,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:54:10,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:10,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:10,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:10,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-14 17:54:10,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646932364] [2020-10-14 17:54:10,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:10,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 17:54:10,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995797417] [2020-10-14 17:54:10,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 17:54:10,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 17:54:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:10,891 INFO L87 Difference]: Start difference. First operand 211 states and 216 transitions. Second operand 27 states. [2020-10-14 17:54:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:11,488 INFO L93 Difference]: Finished difference Result 378 states and 390 transitions. [2020-10-14 17:54:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 17:54:11,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 205 [2020-10-14 17:54:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:11,491 INFO L225 Difference]: With dead ends: 378 [2020-10-14 17:54:11,491 INFO L226 Difference]: Without dead ends: 223 [2020-10-14 17:54:11,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 17:54:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-14 17:54:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2020-10-14 17:54:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-14 17:54:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 224 transitions. [2020-10-14 17:54:11,520 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 224 transitions. Word has length 205 [2020-10-14 17:54:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:11,520 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 224 transitions. [2020-10-14 17:54:11,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 17:54:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 224 transitions. [2020-10-14 17:54:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-14 17:54:11,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:11,522 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:11,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 17:54:11,522 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:11,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1867763454, now seen corresponding path program 24 times [2020-10-14 17:54:11,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:11,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793690790] [2020-10-14 17:54:11,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:11,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:11,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:16,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:16,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-14 17:54:16,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:16,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-14 17:54:16,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:16,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 17:54:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 17:54:16,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 17:54:16,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:17,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:17,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:17,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:17,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:17,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:17,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:17,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:17,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:17,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2020-10-14 17:54:17,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793690790] [2020-10-14 17:54:17,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:17,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 17:54:17,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853990982] [2020-10-14 17:54:17,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 17:54:17,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:17,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 17:54:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:17,198 INFO L87 Difference]: Start difference. First operand 219 states and 224 transitions. Second operand 28 states. [2020-10-14 17:54:17,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:17,753 INFO L93 Difference]: Finished difference Result 392 states and 404 transitions. [2020-10-14 17:54:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 17:54:17,754 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 213 [2020-10-14 17:54:17,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:17,755 INFO L225 Difference]: With dead ends: 392 [2020-10-14 17:54:17,756 INFO L226 Difference]: Without dead ends: 231 [2020-10-14 17:54:17,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 17:54:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-14 17:54:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2020-10-14 17:54:17,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 17:54:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 232 transitions. [2020-10-14 17:54:17,802 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 232 transitions. Word has length 213 [2020-10-14 17:54:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:17,802 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 232 transitions. [2020-10-14 17:54:17,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 17:54:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 232 transitions. [2020-10-14 17:54:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-14 17:54:17,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:17,804 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:17,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 17:54:17,804 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:17,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1534010874, now seen corresponding path program 25 times [2020-10-14 17:54:17,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:17,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188523423] [2020-10-14 17:54:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:17,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:17,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:17,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:17,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:23,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:23,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-14 17:54:23,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:23,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5323 [2020-10-14 17:54:23,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:23,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 17:54:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 117 [2020-10-14 17:54:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 17:54:23,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:23,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:23,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:23,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:23,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:23,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:23,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:23,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:23,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:23,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:23,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1875 trivial. 0 not checked. [2020-10-14 17:54:23,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188523423] [2020-10-14 17:54:23,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:23,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 17:54:23,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850955393] [2020-10-14 17:54:23,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 17:54:23,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 17:54:23,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:23,677 INFO L87 Difference]: Start difference. First operand 227 states and 232 transitions. Second operand 29 states. [2020-10-14 17:54:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:24,256 INFO L93 Difference]: Finished difference Result 406 states and 418 transitions. [2020-10-14 17:54:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 17:54:24,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 221 [2020-10-14 17:54:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:24,258 INFO L225 Difference]: With dead ends: 406 [2020-10-14 17:54:24,258 INFO L226 Difference]: Without dead ends: 239 [2020-10-14 17:54:24,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 17:54:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-14 17:54:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2020-10-14 17:54:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-14 17:54:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 240 transitions. [2020-10-14 17:54:24,292 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 240 transitions. Word has length 221 [2020-10-14 17:54:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:24,292 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 240 transitions. [2020-10-14 17:54:24,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 17:54:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 240 transitions. [2020-10-14 17:54:24,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-14 17:54:24,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:24,294 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:24,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 17:54:24,295 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:24,295 INFO L82 PathProgramCache]: Analyzing trace with hash -862256398, now seen corresponding path program 26 times [2020-10-14 17:54:24,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:24,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633610435] [2020-10-14 17:54:24,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:24,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:24,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:29,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:29,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-14 17:54:29,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:54:29,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5284 [2020-10-14 17:54:29,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:29,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 17:54:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 17:54:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 17:54:29,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:30,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:30,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:30,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:30,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:30,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:30,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2020-10-14 17:54:30,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633610435] [2020-10-14 17:54:30,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:30,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 17:54:30,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174369772] [2020-10-14 17:54:30,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 17:54:30,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 17:54:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:30,163 INFO L87 Difference]: Start difference. First operand 235 states and 240 transitions. Second operand 30 states. [2020-10-14 17:54:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:30,907 INFO L93 Difference]: Finished difference Result 420 states and 432 transitions. [2020-10-14 17:54:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 17:54:30,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 229 [2020-10-14 17:54:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:30,910 INFO L225 Difference]: With dead ends: 420 [2020-10-14 17:54:30,910 INFO L226 Difference]: Without dead ends: 247 [2020-10-14 17:54:30,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 17:54:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-14 17:54:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2020-10-14 17:54:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-14 17:54:30,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 248 transitions. [2020-10-14 17:54:30,947 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 248 transitions. Word has length 229 [2020-10-14 17:54:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:30,947 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 248 transitions. [2020-10-14 17:54:30,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 17:54:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 248 transitions. [2020-10-14 17:54:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-14 17:54:30,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:30,949 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:30,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 17:54:30,949 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:30,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1779943402, now seen corresponding path program 27 times [2020-10-14 17:54:30,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:30,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959864222] [2020-10-14 17:54:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:30,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:30,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:31,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:36,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-14 17:54:36,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:54:36,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5119 [2020-10-14 17:54:36,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:36,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 17:54:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:54:36,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 17:54:36,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:36,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:36,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:36,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:36,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:36,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:36,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:36,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:36,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:36,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:36,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 2187 trivial. 0 not checked. [2020-10-14 17:54:36,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959864222] [2020-10-14 17:54:36,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:36,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 17:54:36,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524522457] [2020-10-14 17:54:36,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 17:54:36,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 17:54:36,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:36,686 INFO L87 Difference]: Start difference. First operand 243 states and 248 transitions. Second operand 31 states. [2020-10-14 17:54:37,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:37,453 INFO L93 Difference]: Finished difference Result 434 states and 446 transitions. [2020-10-14 17:54:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 17:54:37,454 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 237 [2020-10-14 17:54:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:37,456 INFO L225 Difference]: With dead ends: 434 [2020-10-14 17:54:37,456 INFO L226 Difference]: Without dead ends: 255 [2020-10-14 17:54:37,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 17:54:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-14 17:54:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2020-10-14 17:54:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-14 17:54:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 256 transitions. [2020-10-14 17:54:37,489 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 256 transitions. Word has length 237 [2020-10-14 17:54:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:37,490 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 256 transitions. [2020-10-14 17:54:37,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 17:54:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 256 transitions. [2020-10-14 17:54:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-14 17:54:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:37,491 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:37,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 17:54:37,491 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1009945374, now seen corresponding path program 28 times [2020-10-14 17:54:37,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:37,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632580317] [2020-10-14 17:54:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:37,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:37,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:37,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:42,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:42,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-14 17:54:42,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:54:42,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 17:54:42,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:42,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 17:54:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 17:54:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 17:54:42,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:54:43,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:43,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:43,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:43,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:43,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2020-10-14 17:54:43,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632580317] [2020-10-14 17:54:43,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:43,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 17:54:43,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359716904] [2020-10-14 17:54:43,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 17:54:43,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 17:54:43,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:43,147 INFO L87 Difference]: Start difference. First operand 251 states and 256 transitions. Second operand 32 states. [2020-10-14 17:54:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:44,078 INFO L93 Difference]: Finished difference Result 448 states and 460 transitions. [2020-10-14 17:54:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 17:54:44,079 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 245 [2020-10-14 17:54:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:44,081 INFO L225 Difference]: With dead ends: 448 [2020-10-14 17:54:44,082 INFO L226 Difference]: Without dead ends: 263 [2020-10-14 17:54:44,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 17:54:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-14 17:54:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 259. [2020-10-14 17:54:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-14 17:54:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 264 transitions. [2020-10-14 17:54:44,136 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 264 transitions. Word has length 245 [2020-10-14 17:54:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:44,137 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 264 transitions. [2020-10-14 17:54:44,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 17:54:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 264 transitions. [2020-10-14 17:54:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-14 17:54:44,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:44,140 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:44,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 17:54:44,141 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:44,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1940130266, now seen corresponding path program 29 times [2020-10-14 17:54:44,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:44,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952885814] [2020-10-14 17:54:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:44,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:44,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:49,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:49,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-14 17:54:49,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:54:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5410 [2020-10-14 17:54:49,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:49,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 17:54:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 17:54:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 17:54:49,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:50,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:50,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:50,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:50,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:50,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:50,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:50,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:50,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:50,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:50,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:50,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:50,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 2523 trivial. 0 not checked. [2020-10-14 17:54:50,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952885814] [2020-10-14 17:54:50,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:50,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 17:54:50,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186472431] [2020-10-14 17:54:50,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 17:54:50,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 17:54:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:50,246 INFO L87 Difference]: Start difference. First operand 259 states and 264 transitions. Second operand 33 states. [2020-10-14 17:54:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:51,063 INFO L93 Difference]: Finished difference Result 462 states and 474 transitions. [2020-10-14 17:54:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 17:54:51,063 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 253 [2020-10-14 17:54:51,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:51,066 INFO L225 Difference]: With dead ends: 462 [2020-10-14 17:54:51,066 INFO L226 Difference]: Without dead ends: 271 [2020-10-14 17:54:51,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 17:54:51,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-14 17:54:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2020-10-14 17:54:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-10-14 17:54:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 272 transitions. [2020-10-14 17:54:51,098 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 272 transitions. Word has length 253 [2020-10-14 17:54:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:51,098 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 272 transitions. [2020-10-14 17:54:51,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 17:54:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 272 transitions. [2020-10-14 17:54:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-14 17:54:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:51,099 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:51,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 17:54:51,100 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash 495158994, now seen corresponding path program 30 times [2020-10-14 17:54:51,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:51,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865718311] [2020-10-14 17:54:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:51,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:51,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:51,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:56,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:56,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-14 17:54:56,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:54:56,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5819 [2020-10-14 17:54:56,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:56,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 17:54:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 17:54:56,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 17:54:56,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:57,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:54:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:57,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:57,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:54:57,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:54:57,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:54:57,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:54:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2700 trivial. 0 not checked. [2020-10-14 17:54:57,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865718311] [2020-10-14 17:54:57,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:54:57,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 17:54:57,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129331694] [2020-10-14 17:54:57,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 17:54:57,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:54:57,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 17:54:57,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:57,652 INFO L87 Difference]: Start difference. First operand 267 states and 272 transitions. Second operand 34 states. [2020-10-14 17:54:58,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:54:58,514 INFO L93 Difference]: Finished difference Result 476 states and 488 transitions. [2020-10-14 17:54:58,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 17:54:58,515 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 261 [2020-10-14 17:54:58,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:54:58,517 INFO L225 Difference]: With dead ends: 476 [2020-10-14 17:54:58,517 INFO L226 Difference]: Without dead ends: 279 [2020-10-14 17:54:58,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 17:54:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-14 17:54:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 275. [2020-10-14 17:54:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-10-14 17:54:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 280 transitions. [2020-10-14 17:54:58,552 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 280 transitions. Word has length 261 [2020-10-14 17:54:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:54:58,552 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 280 transitions. [2020-10-14 17:54:58,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 17:54:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 280 transitions. [2020-10-14 17:54:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-14 17:54:58,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:54:58,554 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:54:58,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 17:54:58,554 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:54:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:54:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1867770826, now seen corresponding path program 31 times [2020-10-14 17:54:58,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:54:58,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443107401] [2020-10-14 17:54:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:54:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:54:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:54:58,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:04,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:04,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-14 17:55:04,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:55:04,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5453 [2020-10-14 17:55:04,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:04,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 17:55:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 17:55:04,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 17:55:04,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:04,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:04,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:04,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:04,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2020-10-14 17:55:04,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443107401] [2020-10-14 17:55:04,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:04,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 17:55:04,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778521625] [2020-10-14 17:55:04,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 17:55:04,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 17:55:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:55:04,767 INFO L87 Difference]: Start difference. First operand 275 states and 280 transitions. Second operand 35 states. [2020-10-14 17:55:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:05,666 INFO L93 Difference]: Finished difference Result 490 states and 502 transitions. [2020-10-14 17:55:05,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 17:55:05,667 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 269 [2020-10-14 17:55:05,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:05,669 INFO L225 Difference]: With dead ends: 490 [2020-10-14 17:55:05,669 INFO L226 Difference]: Without dead ends: 287 [2020-10-14 17:55:05,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 17:55:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-14 17:55:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 283. [2020-10-14 17:55:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-10-14 17:55:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 288 transitions. [2020-10-14 17:55:05,698 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 288 transitions. Word has length 269 [2020-10-14 17:55:05,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:05,698 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 288 transitions. [2020-10-14 17:55:05,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 17:55:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 288 transitions. [2020-10-14 17:55:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-14 17:55:05,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:05,700 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:05,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 17:55:05,700 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash 553466050, now seen corresponding path program 32 times [2020-10-14 17:55:05,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:05,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664291291] [2020-10-14 17:55:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:05,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:05,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:05,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:10,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:10,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 285 [2020-10-14 17:55:10,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:10,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5279 [2020-10-14 17:55:10,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:10,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 17:55:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:10,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 17:55:10,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:11,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:11,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:11,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:11,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:11,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:11,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:11,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:11,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:11,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 17:55:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 3072 trivial. 0 not checked. [2020-10-14 17:55:11,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664291291] [2020-10-14 17:55:11,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:11,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 17:55:11,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722972513] [2020-10-14 17:55:11,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 17:55:11,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:11,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 17:55:11,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:11,791 INFO L87 Difference]: Start difference. First operand 283 states and 288 transitions. Second operand 36 states. [2020-10-14 17:55:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:12,559 INFO L93 Difference]: Finished difference Result 504 states and 516 transitions. [2020-10-14 17:55:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 17:55:12,559 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 277 [2020-10-14 17:55:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:12,562 INFO L225 Difference]: With dead ends: 504 [2020-10-14 17:55:12,562 INFO L226 Difference]: Without dead ends: 295 [2020-10-14 17:55:12,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 17:55:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-14 17:55:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 291. [2020-10-14 17:55:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-14 17:55:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 296 transitions. [2020-10-14 17:55:12,598 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 296 transitions. Word has length 277 [2020-10-14 17:55:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:12,598 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 296 transitions. [2020-10-14 17:55:12,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 17:55:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 296 transitions. [2020-10-14 17:55:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-14 17:55:12,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:12,601 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:12,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 17:55:12,601 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -194548294, now seen corresponding path program 33 times [2020-10-14 17:55:12,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:12,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163359493] [2020-10-14 17:55:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:12,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:12,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:17,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-14 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-14 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:17,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 17:55:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 17:55:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-14 17:55:17,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:18,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:18,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:18,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:18,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:18,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:18,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:18,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:18,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:18,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:18,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 3267 trivial. 0 not checked. [2020-10-14 17:55:18,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163359493] [2020-10-14 17:55:18,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:18,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 17:55:18,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949637268] [2020-10-14 17:55:18,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 17:55:18,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:18,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 17:55:18,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:18,675 INFO L87 Difference]: Start difference. First operand 291 states and 296 transitions. Second operand 37 states. [2020-10-14 17:55:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:19,525 INFO L93 Difference]: Finished difference Result 518 states and 530 transitions. [2020-10-14 17:55:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 17:55:19,525 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 285 [2020-10-14 17:55:19,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:19,528 INFO L225 Difference]: With dead ends: 518 [2020-10-14 17:55:19,528 INFO L226 Difference]: Without dead ends: 303 [2020-10-14 17:55:19,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 17:55:19,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-14 17:55:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2020-10-14 17:55:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-14 17:55:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 304 transitions. [2020-10-14 17:55:19,563 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 304 transitions. Word has length 285 [2020-10-14 17:55:19,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:19,563 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 304 transitions. [2020-10-14 17:55:19,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 17:55:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 304 transitions. [2020-10-14 17:55:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-14 17:55:19,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:19,566 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:19,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 17:55:19,566 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1250260302, now seen corresponding path program 34 times [2020-10-14 17:55:19,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:19,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514459276] [2020-10-14 17:55:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:19,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:19,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:25,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5604 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-14 17:55:25,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 17:55:25,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:26,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:26,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:26,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:26,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 3468 trivial. 0 not checked. [2020-10-14 17:55:26,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514459276] [2020-10-14 17:55:26,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:26,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 17:55:26,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415709718] [2020-10-14 17:55:26,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 17:55:26,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:26,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 17:55:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:55:26,109 INFO L87 Difference]: Start difference. First operand 299 states and 304 transitions. Second operand 38 states. [2020-10-14 17:55:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:27,036 INFO L93 Difference]: Finished difference Result 532 states and 544 transitions. [2020-10-14 17:55:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 17:55:27,037 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 293 [2020-10-14 17:55:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:27,039 INFO L225 Difference]: With dead ends: 532 [2020-10-14 17:55:27,039 INFO L226 Difference]: Without dead ends: 311 [2020-10-14 17:55:27,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 17:55:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-14 17:55:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2020-10-14 17:55:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-14 17:55:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 312 transitions. [2020-10-14 17:55:27,069 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 312 transitions. Word has length 293 [2020-10-14 17:55:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:27,069 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 312 transitions. [2020-10-14 17:55:27,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 17:55:27,069 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 312 transitions. [2020-10-14 17:55:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-14 17:55:27,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:27,071 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:27,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 17:55:27,071 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 975081386, now seen corresponding path program 35 times [2020-10-14 17:55:27,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:27,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109689191] [2020-10-14 17:55:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:27,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:32,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:32,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-14 17:55:32,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 17:55:32,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5141 [2020-10-14 17:55:32,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:32,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 17:55:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 17:55:32,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 17:55:32,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:33,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 17:55:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:33,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:33,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 17:55:33,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 17:55:33,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 17:55:33,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 17:55:33,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 17:55:33,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 17:55:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 17:55:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 17:55:33,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 17:55:33,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 17:55:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 3675 trivial. 0 not checked. [2020-10-14 17:55:33,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109689191] [2020-10-14 17:55:33,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 17:55:33,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 17:55:33,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281682794] [2020-10-14 17:55:33,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 17:55:33,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 17:55:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 17:55:33,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:55:33,180 INFO L87 Difference]: Start difference. First operand 307 states and 312 transitions. Second operand 39 states. [2020-10-14 17:55:34,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 17:55:34,048 INFO L93 Difference]: Finished difference Result 546 states and 558 transitions. [2020-10-14 17:55:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 17:55:34,049 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 301 [2020-10-14 17:55:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 17:55:34,051 INFO L225 Difference]: With dead ends: 546 [2020-10-14 17:55:34,051 INFO L226 Difference]: Without dead ends: 319 [2020-10-14 17:55:34,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 17:55:34,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-14 17:55:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2020-10-14 17:55:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-14 17:55:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 320 transitions. [2020-10-14 17:55:34,090 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 320 transitions. Word has length 301 [2020-10-14 17:55:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 17:55:34,090 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 320 transitions. [2020-10-14 17:55:34,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 17:55:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 320 transitions. [2020-10-14 17:55:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-14 17:55:34,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 17:55:34,092 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 17:55:34,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 17:55:34,092 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 17:55:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 17:55:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1648065698, now seen corresponding path program 36 times [2020-10-14 17:55:34,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 17:55:34,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989461851] [2020-10-14 17:55:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 17:55:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 17:55:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 17:55:34,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking...