/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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:44:14,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:44:14,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:44:14,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:44:14,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:44:14,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:44:14,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:44:14,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:44:14,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:44:14,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:44:14,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:44:14,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:44:14,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:44:14,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:44:14,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:44:14,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:44:14,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:44:14,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:44:14,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:44:14,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:44:14,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:44:14,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:44:14,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:44:14,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:44:14,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:44:14,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:44:14,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:44:14,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:44:14,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:44:14,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:44:14,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:44:14,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:44:14,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:44:14,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:44:14,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:44:14,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:44:14,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:44:14,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:44:14,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:44:14,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:44:14,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:44:14,519 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 23:44:14,550 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:44:14,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:44:14,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:44:14,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:44:14,552 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:44:14,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:44:14,552 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:44:14,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:44:14,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:44:14,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:44:14,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:44:14,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:44:14,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:44:14,553 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:44:14,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:44:14,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:44:14,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:44:14,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:44:14,554 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:44:14,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:44:14,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:44:14,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:44:14,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:44:14,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:44:14,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:44:14,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:44:14,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:44:14,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:44:14,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:44:14,557 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 23:44:14,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:44:14,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:44:14,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:44:14,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:44:14,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:44:14,886 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-14 23:44:14,951 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8341fd80/ab4928e9d5484a758df892923b6a14fe/FLAGd2ac711db [2020-10-14 23:44:15,395 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:44:15,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2020-10-14 23:44:15,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8341fd80/ab4928e9d5484a758df892923b6a14fe/FLAGd2ac711db [2020-10-14 23:44:15,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8341fd80/ab4928e9d5484a758df892923b6a14fe [2020-10-14 23:44:15,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:44:15,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:44:15,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:44:15,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:44:15,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:44:15,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:15" (1/1) ... [2020-10-14 23:44:15,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a7ca91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:15, skipping insertion in model container [2020-10-14 23:44:15,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:15" (1/1) ... [2020-10-14 23:44:15,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:44:15,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:44:16,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:44:16,016 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:44:16,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:44:16,055 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:44:16,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16 WrapperNode [2020-10-14 23:44:16,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:44:16,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:44:16,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:44:16,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:44:16,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (1/1) ... [2020-10-14 23:44:16,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:44:16,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:44:16,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:44:16,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:44:16,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (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 23:44:16,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:44:16,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:44:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:44:16,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:44:16,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:44:16,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:44:16,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:44:16,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 23:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:44:16,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:44:16,484 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:44:16,484 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 23:44:16,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:16 BoogieIcfgContainer [2020-10-14 23:44:16,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:44:16,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:44:16,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:44:16,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:44:16,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:44:15" (1/3) ... [2020-10-14 23:44:16,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8cb3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:16, skipping insertion in model container [2020-10-14 23:44:16,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:16" (2/3) ... [2020-10-14 23:44:16,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8cb3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:16, skipping insertion in model container [2020-10-14 23:44:16,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:16" (3/3) ... [2020-10-14 23:44:16,500 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2020-10-14 23:44:16,511 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:44:16,518 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:44:16,532 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:44:16,557 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:44:16,557 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:44:16,558 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:44:16,558 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:44:16,558 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:44:16,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:44:16,558 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:44:16,558 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:44:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-14 23:44:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:44:16,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:16,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:16,589 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1584649929, now seen corresponding path program 1 times [2020-10-14 23:44:16,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:16,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036761868] [2020-10-14 23:44:16,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:16,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:16,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:16,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:44:16,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:44:16,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-14 23:44:16,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:16,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:44:16,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:44:16,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:44:16,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:44:17,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:17,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 23:44:17,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:17,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:17,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:44:17,064 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 23:44:17,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036761868] [2020-10-14 23:44:17,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:44:17,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 23:44:17,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413137529] [2020-10-14 23:44:17,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:44:17,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:44:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:44:17,101 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-14 23:44:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:17,348 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-10-14 23:44:17,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:44:17,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-14 23:44:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:17,359 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:44:17,360 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:44:17,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:44:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-14 23:44:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 23:44:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-14 23:44:17,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 13 [2020-10-14 23:44:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:17,403 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-14 23:44:17,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:44:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-14 23:44:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:44:17,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:17,404 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:17,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:44:17,405 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:17,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1315898579, now seen corresponding path program 1 times [2020-10-14 23:44:17,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:17,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931067305] [2020-10-14 23:44:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:44:17,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:17,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:44:17,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:44:17,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 23:44:17,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:44:17,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:17,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:17,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:17,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:17,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:17,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:17,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:17,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:17,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:44:17,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931067305] [2020-10-14 23:44:17,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:17,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:44:17,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276925966] [2020-10-14 23:44:17,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:44:17,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:44:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:44:17,837 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-10-14 23:44:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:17,953 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-14 23:44:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:44:17,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-14 23:44:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:17,955 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:44:17,955 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:44:17,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:44:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-14 23:44:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 23:44:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-14 23:44:17,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-10-14 23:44:17,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:17,964 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-14 23:44:17,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:44:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-14 23:44:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 23:44:17,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:17,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:17,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:44:17,967 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash 516358124, now seen corresponding path program 2 times [2020-10-14 23:44:17,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:17,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764970547] [2020-10-14 23:44:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 23:44:18,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:18,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-14 23:44:18,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:44:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 23:44:18,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:44:18,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:18,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:18,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:18,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:18,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:44:18,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:18,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:18,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:18,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:44:18,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764970547] [2020-10-14 23:44:18,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:18,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:44:18,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313172492] [2020-10-14 23:44:18,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:44:18,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:44:18,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:44:18,527 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-10-14 23:44:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:18,698 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-10-14 23:44:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:44:18,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 23:44:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:18,700 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:44:18,700 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:44:18,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:44:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:44:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-14 23:44:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-14 23:44:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-10-14 23:44:18,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2020-10-14 23:44:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:18,717 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-10-14 23:44:18,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:44:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-10-14 23:44:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 23:44:18,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:18,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:18,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:44:18,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1291397115, now seen corresponding path program 3 times [2020-10-14 23:44:18,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:18,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225364703] [2020-10-14 23:44:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:18,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:18,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-14 23:44:19,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:19,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 23:44:19,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:44:19,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 23:44:19,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 23:44:19,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:19,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:19,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:19,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 23:44:19,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:19,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:19,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:19,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 23:44:19,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225364703] [2020-10-14 23:44:19,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:19,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:44:19,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623303723] [2020-10-14 23:44:19,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:44:19,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:44:19,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:44:19,391 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 9 states. [2020-10-14 23:44:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:19,577 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-10-14 23:44:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:44:19,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-14 23:44:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:19,580 INFO L225 Difference]: With dead ends: 66 [2020-10-14 23:44:19,581 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:44:19,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:44:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:44:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-14 23:44:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 23:44:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-14 23:44:19,596 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 33 [2020-10-14 23:44:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:19,597 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-14 23:44:19,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:44:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-14 23:44:19,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 23:44:19,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:19,600 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:19,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:44:19,601 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 893709598, now seen corresponding path program 4 times [2020-10-14 23:44:19,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:19,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481314836] [2020-10-14 23:44:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:19,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:19,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:20,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:20,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 23:44:20,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:20,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-14 23:44:20,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:20,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:44:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-14 23:44:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 23:44:20,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:20,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:20,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:20,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:20,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:20,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:20,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:20,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:20,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:20,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:20,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 23:44:20,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481314836] [2020-10-14 23:44:20,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:20,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:44:20,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730360109] [2020-10-14 23:44:20,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:44:20,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:44:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:44:20,848 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 10 states. [2020-10-14 23:44:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:21,000 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-14 23:44:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:44:21,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-14 23:44:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:21,002 INFO L225 Difference]: With dead ends: 76 [2020-10-14 23:44:21,002 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:44:21,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:44:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:44:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-14 23:44:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 23:44:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 23:44:21,010 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 39 [2020-10-14 23:44:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:21,010 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 23:44:21,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:44:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 23:44:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 23:44:21,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:21,012 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:21,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:44:21,013 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash -398483657, now seen corresponding path program 5 times [2020-10-14 23:44:21,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:21,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586901255] [2020-10-14 23:44:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 23:44:21,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:21,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-14 23:44:21,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:44:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 23:44:21,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 23:44:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:21,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:21,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:21,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:21,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:21,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:21,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:21,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:21,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:21,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:21,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 23:44:21,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586901255] [2020-10-14 23:44:21,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:21,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:44:21,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868758924] [2020-10-14 23:44:21,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:44:21,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:21,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:44:21,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:44:21,899 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 11 states. [2020-10-14 23:44:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:22,046 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-10-14 23:44:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:44:22,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-14 23:44:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:22,047 INFO L225 Difference]: With dead ends: 86 [2020-10-14 23:44:22,047 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:44:22,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:44:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:44:22,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-14 23:44:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 23:44:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-14 23:44:22,055 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 45 [2020-10-14 23:44:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:22,055 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-14 23:44:22,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:44:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-14 23:44:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 23:44:22,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:22,057 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:22,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:44:22,057 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:22,058 INFO L82 PathProgramCache]: Analyzing trace with hash 291327568, now seen corresponding path program 6 times [2020-10-14 23:44:22,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:22,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107989194] [2020-10-14 23:44:22,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:22,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 23:44:23,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1179 [2020-10-14 23:44:23,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:44:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 23:44:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 23:44:23,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:23,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:23,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:23,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:23,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:23,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:23,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:23,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:23,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:23,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 23:44:23,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107989194] [2020-10-14 23:44:23,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:23,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:44:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672456007] [2020-10-14 23:44:23,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:44:23,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:44:23,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:44:23,417 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-10-14 23:44:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:23,653 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2020-10-14 23:44:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:44:23,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-14 23:44:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:23,655 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:44:23,655 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 23:44:23,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:44:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 23:44:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-14 23:44:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 23:44:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-14 23:44:23,664 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 51 [2020-10-14 23:44:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:23,665 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-14 23:44:23,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:44:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-14 23:44:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 23:44:23,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:23,667 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:23,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:44:23,668 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:23,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:23,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1655462505, now seen corresponding path program 7 times [2020-10-14 23:44:23,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:23,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613995856] [2020-10-14 23:44:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:23,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:23,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:25,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:25,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 23:44:25,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:25,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-14 23:44:25,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:25,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:44:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 23:44:25,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 23:44:25,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:25,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:25,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:25,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:25,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:25,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:25,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:25,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:25,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:25,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:25,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:25,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:25,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 23:44:25,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613995856] [2020-10-14 23:44:25,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:25,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:44:25,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029989647] [2020-10-14 23:44:25,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:44:25,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:44:25,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:44:25,757 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 13 states. [2020-10-14 23:44:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:26,003 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-14 23:44:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:44:26,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-14 23:44:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:26,004 INFO L225 Difference]: With dead ends: 106 [2020-10-14 23:44:26,004 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 23:44:26,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:44:26,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 23:44:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-10-14 23:44:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 23:44:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-14 23:44:26,012 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 57 [2020-10-14 23:44:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:26,013 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-14 23:44:26,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:44:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-14 23:44:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 23:44:26,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:26,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:26,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:44:26,015 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:26,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:26,015 INFO L82 PathProgramCache]: Analyzing trace with hash -454876286, now seen corresponding path program 8 times [2020-10-14 23:44:26,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:26,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565044505] [2020-10-14 23:44:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:26,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:28,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 23:44:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2407 [2020-10-14 23:44:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:28,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:44:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 23:44:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 23:44:28,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:28,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:28,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:28,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:28,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:28,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:28,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:28,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:28,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 23:44:28,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565044505] [2020-10-14 23:44:28,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:28,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:44:28,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485621043] [2020-10-14 23:44:28,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:44:28,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:28,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:44:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:44:28,610 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 14 states. [2020-10-14 23:44:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:28,843 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2020-10-14 23:44:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:44:28,844 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-14 23:44:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:28,845 INFO L225 Difference]: With dead ends: 116 [2020-10-14 23:44:28,845 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 23:44:28,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:44:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 23:44:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-10-14 23:44:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 23:44:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2020-10-14 23:44:28,854 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 63 [2020-10-14 23:44:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:28,855 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2020-10-14 23:44:28,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:44:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2020-10-14 23:44:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 23:44:28,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:28,856 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:28,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:44:28,857 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:28,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:28,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1633683867, now seen corresponding path program 9 times [2020-10-14 23:44:28,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:28,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613194604] [2020-10-14 23:44:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:28,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:29,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:31,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:31,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 23:44:31,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:31,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2874 [2020-10-14 23:44:31,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:31,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:44:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 23:44:31,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 23:44:31,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:31,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:31,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:31,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:31,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:31,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:31,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:44:31,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:31,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:31,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:31,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:31,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:31,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 23:44:31,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613194604] [2020-10-14 23:44:31,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:31,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:44:31,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616464344] [2020-10-14 23:44:31,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:44:31,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:31,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:44:31,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:44:31,942 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand 15 states. [2020-10-14 23:44:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:32,160 INFO L93 Difference]: Finished difference Result 126 states and 150 transitions. [2020-10-14 23:44:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:44:32,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-14 23:44:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:32,162 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:44:32,162 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 23:44:32,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:44:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 23:44:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-10-14 23:44:32,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 23:44:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2020-10-14 23:44:32,177 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 69 [2020-10-14 23:44:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:32,177 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2020-10-14 23:44:32,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:44:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2020-10-14 23:44:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 23:44:32,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:32,181 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:32,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:44:32,182 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1277783220, now seen corresponding path program 10 times [2020-10-14 23:44:32,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:32,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963420885] [2020-10-14 23:44:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:32,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:32,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:37,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 23:44:37,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:37,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 23:44:37,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:37,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:37,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:44:37,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-14 23:44:37,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 23:44:37,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:37,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:37,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:37,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:37,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:37,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:37,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:37,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:37,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:37,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:37,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:37,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 23:44:37,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963420885] [2020-10-14 23:44:37,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:37,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:44:37,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314549940] [2020-10-14 23:44:37,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:44:37,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:44:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:44:37,422 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand 16 states. [2020-10-14 23:44:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:37,669 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2020-10-14 23:44:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:44:37,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2020-10-14 23:44:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:37,671 INFO L225 Difference]: With dead ends: 136 [2020-10-14 23:44:37,671 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 23:44:37,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:44:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 23:44:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-14 23:44:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 23:44:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-10-14 23:44:37,688 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 75 [2020-10-14 23:44:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:37,688 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-10-14 23:44:37,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:44:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-10-14 23:44:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 23:44:37,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:37,693 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:37,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:44:37,693 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 770550989, now seen corresponding path program 11 times [2020-10-14 23:44:37,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:37,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719207283] [2020-10-14 23:44:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:37,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:41,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:41,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-14 23:44:41,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:41,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3453 [2020-10-14 23:44:41,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:41,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:41,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:44:41,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 23:44:41,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 23:44:41,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:41,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:41,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:41,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:41,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:41,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:41,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:44:41,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:41,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:41,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:41,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:41,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:41,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 23:44:41,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719207283] [2020-10-14 23:44:41,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:41,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:44:41,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786693527] [2020-10-14 23:44:41,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:44:41,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:41,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:44:41,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:44:41,390 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 17 states. [2020-10-14 23:44:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:41,697 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2020-10-14 23:44:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:44:41,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-10-14 23:44:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:41,699 INFO L225 Difference]: With dead ends: 146 [2020-10-14 23:44:41,699 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 23:44:41,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:44:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 23:44:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-10-14 23:44:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 23:44:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2020-10-14 23:44:41,718 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 81 [2020-10-14 23:44:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:41,718 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2020-10-14 23:44:41,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:44:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2020-10-14 23:44:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 23:44:41,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:41,720 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:41,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:44:41,722 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1912395290, now seen corresponding path program 12 times [2020-10-14 23:44:41,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:41,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636980408] [2020-10-14 23:44:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:41,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:41,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:46,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:46,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 23:44:46,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:46,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:44:46,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:46,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:46,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:44:46,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-14 23:44:46,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 23:44:46,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:46,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:46,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:46,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:46,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:46,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:46,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:46,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:46,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:46,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:46,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 23:44:47,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636980408] [2020-10-14 23:44:47,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:47,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:44:47,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376458833] [2020-10-14 23:44:47,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:44:47,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:47,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:44:47,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:44:47,008 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand 18 states. [2020-10-14 23:44:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:47,362 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2020-10-14 23:44:47,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:44:47,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-14 23:44:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:47,364 INFO L225 Difference]: With dead ends: 156 [2020-10-14 23:44:47,364 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 23:44:47,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:44:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 23:44:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2020-10-14 23:44:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 23:44:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2020-10-14 23:44:47,371 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 87 [2020-10-14 23:44:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:47,371 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2020-10-14 23:44:47,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:44:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2020-10-14 23:44:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 23:44:47,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:47,373 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:47,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:44:47,374 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1550337023, now seen corresponding path program 13 times [2020-10-14 23:44:47,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:47,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692277650] [2020-10-14 23:44:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:47,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:52,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:52,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-14 23:44:52,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 23:44:52,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:52,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:52,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:52,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:52,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:52,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:52,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:52,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:52,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:52,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-14 23:44:52,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692277650] [2020-10-14 23:44:52,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:52,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:44:52,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333202346] [2020-10-14 23:44:52,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:44:52,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:52,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:44:52,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:44:52,681 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand 19 states. [2020-10-14 23:44:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:52,950 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2020-10-14 23:44:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:44:52,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2020-10-14 23:44:52,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:52,953 INFO L225 Difference]: With dead ends: 166 [2020-10-14 23:44:52,953 INFO L226 Difference]: Without dead ends: 102 [2020-10-14 23:44:52,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:44:52,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-14 23:44:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-10-14 23:44:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 23:44:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-10-14 23:44:52,958 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 93 [2020-10-14 23:44:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:52,958 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-10-14 23:44:52,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:44:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-10-14 23:44:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 23:44:52,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:52,959 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:52,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:44:52,960 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:52,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:52,960 INFO L82 PathProgramCache]: Analyzing trace with hash -607954152, now seen corresponding path program 14 times [2020-10-14 23:44:52,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:52,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059276111] [2020-10-14 23:44:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:52,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:57,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:57,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 23:44:57,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:44:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:44:57,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:57,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:44:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 23:44:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 23:44:57,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:44:58,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:44:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:58,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:44:58,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:44:58,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:44:58,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:44:58,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:44:58,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:44:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:44:58,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:44:58,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:44:58,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:44:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-14 23:44:58,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059276111] [2020-10-14 23:44:58,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:44:58,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:44:58,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509391630] [2020-10-14 23:44:58,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:44:58,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:44:58,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:44:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:44:58,229 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 20 states. [2020-10-14 23:44:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:44:58,475 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2020-10-14 23:44:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:44:58,476 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2020-10-14 23:44:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:44:58,477 INFO L225 Difference]: With dead ends: 176 [2020-10-14 23:44:58,477 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 23:44:58,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:44:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 23:44:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2020-10-14 23:44:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 23:44:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-10-14 23:44:58,482 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 99 [2020-10-14 23:44:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:44:58,483 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-10-14 23:44:58,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:44:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-10-14 23:44:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-14 23:44:58,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:44:58,484 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:44:58,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:44:58,484 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:44:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:44:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash 191024945, now seen corresponding path program 15 times [2020-10-14 23:44:58,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:44:58,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226964958] [2020-10-14 23:44:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:44:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:44:58,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:44:58,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:02,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:02,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-14 23:45:02,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:02,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4377 [2020-10-14 23:45:02,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:02,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:02,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:45:02,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 23:45:02,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 23:45:02,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:03,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:03,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:03,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:03,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:03,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:03,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:03,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:03,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:03,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:03,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:03,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 23:45:03,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226964958] [2020-10-14 23:45:03,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:03,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:45:03,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281297623] [2020-10-14 23:45:03,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:45:03,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:45:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:45:03,186 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 21 states. [2020-10-14 23:45:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:03,518 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2020-10-14 23:45:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:45:03,519 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-10-14 23:45:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:03,522 INFO L225 Difference]: With dead ends: 186 [2020-10-14 23:45:03,522 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 23:45:03,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:45:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 23:45:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-14 23:45:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-14 23:45:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2020-10-14 23:45:03,536 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 105 [2020-10-14 23:45:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:03,536 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2020-10-14 23:45:03,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:45:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2020-10-14 23:45:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 23:45:03,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:03,538 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:03,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:45:03,538 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:03,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1858273206, now seen corresponding path program 16 times [2020-10-14 23:45:03,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:03,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422386571] [2020-10-14 23:45:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:03,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:03,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:08,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:45:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-14 23:45:08,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 23:45:08,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:08,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:08,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:08,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:08,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:08,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:08,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:08,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:08,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:08,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:08,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-14 23:45:08,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422386571] [2020-10-14 23:45:08,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:08,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:45:08,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997984694] [2020-10-14 23:45:08,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:45:08,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:45:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:45:08,871 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand 22 states. [2020-10-14 23:45:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:09,173 INFO L93 Difference]: Finished difference Result 196 states and 234 transitions. [2020-10-14 23:45:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:45:09,174 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2020-10-14 23:45:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:09,175 INFO L225 Difference]: With dead ends: 196 [2020-10-14 23:45:09,176 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 23:45:09,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:45:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 23:45:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2020-10-14 23:45:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 23:45:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 137 transitions. [2020-10-14 23:45:09,189 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 137 transitions. Word has length 111 [2020-10-14 23:45:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:09,190 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 137 transitions. [2020-10-14 23:45:09,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:45:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 137 transitions. [2020-10-14 23:45:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-14 23:45:09,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:09,192 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:09,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:45:09,192 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash 602951267, now seen corresponding path program 17 times [2020-10-14 23:45:09,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:09,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37691770] [2020-10-14 23:45:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:09,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:09,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:14,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:14,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-14 23:45:14,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 23:45:14,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:14,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:45:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-14 23:45:14,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 23:45:14,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:14,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:14,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:14,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:14,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:14,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:14,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:14,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-14 23:45:14,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37691770] [2020-10-14 23:45:14,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:14,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:45:14,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421343865] [2020-10-14 23:45:14,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:45:14,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:14,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:45:14,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:45:14,562 INFO L87 Difference]: Start difference. First operand 118 states and 137 transitions. Second operand 23 states. [2020-10-14 23:45:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:14,910 INFO L93 Difference]: Finished difference Result 206 states and 246 transitions. [2020-10-14 23:45:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:45:14,911 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2020-10-14 23:45:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:14,913 INFO L225 Difference]: With dead ends: 206 [2020-10-14 23:45:14,913 INFO L226 Difference]: Without dead ends: 126 [2020-10-14 23:45:14,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:45:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-14 23:45:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-10-14 23:45:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-14 23:45:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2020-10-14 23:45:14,919 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 117 [2020-10-14 23:45:14,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:14,919 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2020-10-14 23:45:14,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:45:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2020-10-14 23:45:14,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 23:45:14,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:14,921 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:14,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:45:14,921 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:14,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1958943100, now seen corresponding path program 18 times [2020-10-14 23:45:14,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:14,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089035094] [2020-10-14 23:45:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:14,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:19,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:19,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 23:45:19,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:20,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:20,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:20,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-14 23:45:20,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089035094] [2020-10-14 23:45:20,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:20,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:45:20,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326708050] [2020-10-14 23:45:20,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:45:20,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:45:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:45:20,326 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 24 states. [2020-10-14 23:45:20,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:20,671 INFO L93 Difference]: Finished difference Result 216 states and 258 transitions. [2020-10-14 23:45:20,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:45:20,671 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2020-10-14 23:45:20,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:20,673 INFO L225 Difference]: With dead ends: 216 [2020-10-14 23:45:20,673 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 23:45:20,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:45:20,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 23:45:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2020-10-14 23:45:20,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 23:45:20,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2020-10-14 23:45:20,680 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 123 [2020-10-14 23:45:20,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:20,680 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2020-10-14 23:45:20,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:45:20,680 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2020-10-14 23:45:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-14 23:45:20,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:20,682 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:20,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:45:20,682 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:20,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1717321323, now seen corresponding path program 19 times [2020-10-14 23:45:20,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:20,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206151079] [2020-10-14 23:45:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:20,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:25,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:25,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-14 23:45:25,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:25,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-14 23:45:25,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:25,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:45:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 23:45:25,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 23:45:25,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:26,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:26,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:26,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:26,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:26,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:26,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:26,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:26,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:26,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:26,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:26,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:26,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-14 23:45:26,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206151079] [2020-10-14 23:45:26,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:26,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 23:45:26,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857862904] [2020-10-14 23:45:26,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:45:26,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:45:26,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:45:26,120 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand 25 states. [2020-10-14 23:45:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:26,486 INFO L93 Difference]: Finished difference Result 226 states and 270 transitions. [2020-10-14 23:45:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:45:26,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 129 [2020-10-14 23:45:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:26,488 INFO L225 Difference]: With dead ends: 226 [2020-10-14 23:45:26,488 INFO L226 Difference]: Without dead ends: 138 [2020-10-14 23:45:26,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:45:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-14 23:45:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-10-14 23:45:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 23:45:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 158 transitions. [2020-10-14 23:45:26,495 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 158 transitions. Word has length 129 [2020-10-14 23:45:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:26,496 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 158 transitions. [2020-10-14 23:45:26,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 23:45:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 158 transitions. [2020-10-14 23:45:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 23:45:26,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:26,498 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:26,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:45:26,498 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:26,498 INFO L82 PathProgramCache]: Analyzing trace with hash -148330834, now seen corresponding path program 20 times [2020-10-14 23:45:26,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:26,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500012011] [2020-10-14 23:45:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:26,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:27,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:31,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:31,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 23:45:31,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:31,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 23:45:31,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:31,526 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 23:45:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-14 23:45:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-14 23:45:31,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:31,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:31,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:31,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:31,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:31,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:31,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:31,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:31,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:31,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:31,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:31,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:31,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-14 23:45:31,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500012011] [2020-10-14 23:45:31,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:31,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 23:45:31,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096815126] [2020-10-14 23:45:31,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 23:45:31,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 23:45:31,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-14 23:45:31,940 INFO L87 Difference]: Start difference. First operand 136 states and 158 transitions. Second operand 26 states. [2020-10-14 23:45:32,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:32,316 INFO L93 Difference]: Finished difference Result 236 states and 282 transitions. [2020-10-14 23:45:32,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 23:45:32,317 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2020-10-14 23:45:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:32,318 INFO L225 Difference]: With dead ends: 236 [2020-10-14 23:45:32,319 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 23:45:32,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:45:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 23:45:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-14 23:45:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 23:45:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2020-10-14 23:45:32,327 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 135 [2020-10-14 23:45:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:32,327 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2020-10-14 23:45:32,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 23:45:32,327 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2020-10-14 23:45:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-14 23:45:32,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:32,329 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:32,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:45:32,329 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1433392953, now seen corresponding path program 21 times [2020-10-14 23:45:32,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:32,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045694245] [2020-10-14 23:45:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:32,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:37,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:37,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-14 23:45:37,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:37,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 23:45:37,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:37,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 23:45:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-14 23:45:37,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 23:45:37,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:37,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:37,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:37,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:37,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:37,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:45:37,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:37,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:37,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:37,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-14 23:45:37,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045694245] [2020-10-14 23:45:37,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:37,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 23:45:37,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859432935] [2020-10-14 23:45:37,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 23:45:37,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 23:45:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:45:37,797 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand 27 states. [2020-10-14 23:45:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:38,179 INFO L93 Difference]: Finished difference Result 246 states and 294 transitions. [2020-10-14 23:45:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 23:45:38,182 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 141 [2020-10-14 23:45:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:38,184 INFO L225 Difference]: With dead ends: 246 [2020-10-14 23:45:38,184 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 23:45:38,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:45:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 23:45:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-10-14 23:45:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-14 23:45:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 172 transitions. [2020-10-14 23:45:38,191 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 172 transitions. Word has length 141 [2020-10-14 23:45:38,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:38,192 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 172 transitions. [2020-10-14 23:45:38,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 23:45:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 172 transitions. [2020-10-14 23:45:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 23:45:38,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:38,194 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:38,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:45:38,195 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:38,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1942005728, now seen corresponding path program 22 times [2020-10-14 23:45:38,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:38,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927075297] [2020-10-14 23:45:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:38,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:38,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:43,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 23:45:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-14 23:45:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:43,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:43,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:43,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:43,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:43,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:43,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-14 23:45:43,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927075297] [2020-10-14 23:45:43,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:43,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 23:45:43,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717449774] [2020-10-14 23:45:43,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 23:45:43,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 23:45:43,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-14 23:45:43,682 INFO L87 Difference]: Start difference. First operand 148 states and 172 transitions. Second operand 28 states. [2020-10-14 23:45:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:44,081 INFO L93 Difference]: Finished difference Result 256 states and 306 transitions. [2020-10-14 23:45:44,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 23:45:44,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2020-10-14 23:45:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:44,084 INFO L225 Difference]: With dead ends: 256 [2020-10-14 23:45:44,084 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 23:45:44,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:45:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 23:45:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2020-10-14 23:45:44,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 23:45:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 179 transitions. [2020-10-14 23:45:44,092 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 179 transitions. Word has length 147 [2020-10-14 23:45:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:44,092 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 179 transitions. [2020-10-14 23:45:44,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 23:45:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 179 transitions. [2020-10-14 23:45:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-14 23:45:44,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:44,094 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:44,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:45:44,095 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:44,095 INFO L82 PathProgramCache]: Analyzing trace with hash 524846073, now seen corresponding path program 23 times [2020-10-14 23:45:44,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:44,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32173390] [2020-10-14 23:45:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:44,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:44,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:49,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-14 23:45:49,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:45:49,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:49,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:49,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 23:45:49,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 23:45:49,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-14 23:45:49,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:45:49,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:49,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:49,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:49,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-14 23:45:49,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32173390] [2020-10-14 23:45:49,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:49,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 23:45:49,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289775028] [2020-10-14 23:45:49,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 23:45:49,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 23:45:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:45:49,624 INFO L87 Difference]: Start difference. First operand 154 states and 179 transitions. Second operand 29 states. [2020-10-14 23:45:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:50,045 INFO L93 Difference]: Finished difference Result 266 states and 318 transitions. [2020-10-14 23:45:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 23:45:50,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2020-10-14 23:45:50,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:50,047 INFO L225 Difference]: With dead ends: 266 [2020-10-14 23:45:50,047 INFO L226 Difference]: Without dead ends: 162 [2020-10-14 23:45:50,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=589, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:45:50,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-14 23:45:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-10-14 23:45:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-14 23:45:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2020-10-14 23:45:50,056 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 153 [2020-10-14 23:45:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:50,057 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2020-10-14 23:45:50,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 23:45:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2020-10-14 23:45:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-14 23:45:50,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:50,058 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:50,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:45:50,059 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:50,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:50,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1885216018, now seen corresponding path program 24 times [2020-10-14 23:45:50,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:50,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685513099] [2020-10-14 23:45:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:50,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:50,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:55,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:55,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-14 23:45:55,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:45:55,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-14 23:45:55,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:55,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 23:45:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 23:45:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-14 23:45:55,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:45:55,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:45:55,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:55,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:45:55,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:45:55,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:45:55,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:45:55,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:45:55,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:45:55,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:45:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:45:55,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:45:55,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:45:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-14 23:45:55,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685513099] [2020-10-14 23:45:55,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:45:55,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 23:45:55,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813928784] [2020-10-14 23:45:55,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 23:45:55,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:45:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 23:45:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-14 23:45:55,839 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand 30 states. [2020-10-14 23:45:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:45:56,370 INFO L93 Difference]: Finished difference Result 276 states and 330 transitions. [2020-10-14 23:45:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 23:45:56,371 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 159 [2020-10-14 23:45:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:45:56,373 INFO L225 Difference]: With dead ends: 276 [2020-10-14 23:45:56,373 INFO L226 Difference]: Without dead ends: 168 [2020-10-14 23:45:56,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=625, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:45:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-14 23:45:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2020-10-14 23:45:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-14 23:45:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2020-10-14 23:45:56,383 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 159 [2020-10-14 23:45:56,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:45:56,383 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2020-10-14 23:45:56,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 23:45:56,383 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2020-10-14 23:45:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-14 23:45:56,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:45:56,385 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:45:56,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 23:45:56,386 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:45:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:45:56,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1965042901, now seen corresponding path program 25 times [2020-10-14 23:45:56,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:45:56,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294789381] [2020-10-14 23:45:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:45:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:45:56,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:45:57,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:01,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:01,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-14 23:46:01,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 23:46:01,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:01,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 23:46:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-14 23:46:01,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-14 23:46:01,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:02,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:02,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:02,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:02,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:02,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:02,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:02,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:02,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:02,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:02,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:02,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:02,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-14 23:46:02,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294789381] [2020-10-14 23:46:02,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:02,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 23:46:02,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428173128] [2020-10-14 23:46:02,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 23:46:02,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 23:46:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:46:02,217 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand 31 states. [2020-10-14 23:46:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:02,847 INFO L93 Difference]: Finished difference Result 286 states and 342 transitions. [2020-10-14 23:46:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 23:46:02,847 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 165 [2020-10-14 23:46:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:02,849 INFO L225 Difference]: With dead ends: 286 [2020-10-14 23:46:02,849 INFO L226 Difference]: Without dead ends: 174 [2020-10-14 23:46:02,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:46:02,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-14 23:46:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-14 23:46:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 23:46:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2020-10-14 23:46:02,862 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 165 [2020-10-14 23:46:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:02,863 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2020-10-14 23:46:02,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 23:46:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2020-10-14 23:46:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-14 23:46:02,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:02,864 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:02,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 23:46:02,865 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:02,867 INFO L82 PathProgramCache]: Analyzing trace with hash -581695932, now seen corresponding path program 26 times [2020-10-14 23:46:02,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:02,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317844287] [2020-10-14 23:46:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:04,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:07,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:07,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-14 23:46:07,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-14 23:46:07,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:08,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:08,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:08,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:08,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:08,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:08,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:08,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:08,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:08,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-14 23:46:08,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317844287] [2020-10-14 23:46:08,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:08,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 23:46:08,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886384315] [2020-10-14 23:46:08,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 23:46:08,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 23:46:08,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-14 23:46:08,580 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand 32 states. [2020-10-14 23:46:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:09,063 INFO L93 Difference]: Finished difference Result 296 states and 354 transitions. [2020-10-14 23:46:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 23:46:09,066 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2020-10-14 23:46:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:09,068 INFO L225 Difference]: With dead ends: 296 [2020-10-14 23:46:09,068 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 23:46:09,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=422, Invalid=700, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:46:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 23:46:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2020-10-14 23:46:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-14 23:46:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 207 transitions. [2020-10-14 23:46:09,075 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 207 transitions. Word has length 171 [2020-10-14 23:46:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:09,076 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 207 transitions. [2020-10-14 23:46:09,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 23:46:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 207 transitions. [2020-10-14 23:46:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-14 23:46:09,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:09,077 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:09,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 23:46:09,078 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:09,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1964435875, now seen corresponding path program 27 times [2020-10-14 23:46:09,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:09,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987083855] [2020-10-14 23:46:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:09,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:14,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:14,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-14 23:46:14,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:14,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 23:46:14,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:14,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 23:46:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 23:46:14,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 23:46:14,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:14,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:14,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:14,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:14,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:14,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:14,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-14 23:46:14,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987083855] [2020-10-14 23:46:14,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:14,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 23:46:14,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973219089] [2020-10-14 23:46:14,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 23:46:14,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 23:46:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:46:14,763 INFO L87 Difference]: Start difference. First operand 178 states and 207 transitions. Second operand 33 states. [2020-10-14 23:46:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:15,250 INFO L93 Difference]: Finished difference Result 306 states and 366 transitions. [2020-10-14 23:46:15,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 23:46:15,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 177 [2020-10-14 23:46:15,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:15,252 INFO L225 Difference]: With dead ends: 306 [2020-10-14 23:46:15,253 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 23:46:15,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=451, Invalid=739, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:46:15,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 23:46:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-10-14 23:46:15,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-14 23:46:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 214 transitions. [2020-10-14 23:46:15,261 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 214 transitions. Word has length 177 [2020-10-14 23:46:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:15,261 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 214 transitions. [2020-10-14 23:46:15,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 23:46:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 214 transitions. [2020-10-14 23:46:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-14 23:46:15,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:15,263 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:15,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 23:46:15,263 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:15,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1433756534, now seen corresponding path program 28 times [2020-10-14 23:46:15,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:15,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14430056] [2020-10-14 23:46:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:15,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:16,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:20,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:20,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-14 23:46:20,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:20,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-14 23:46:20,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:20,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 23:46:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-14 23:46:20,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 23:46:20,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:21,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:21,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:21,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:21,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:21,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:21,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:21,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:21,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:21,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:21,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:21,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:21,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-14 23:46:21,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14430056] [2020-10-14 23:46:21,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:21,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 23:46:21,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316162129] [2020-10-14 23:46:21,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 23:46:21,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 23:46:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 23:46:21,050 INFO L87 Difference]: Start difference. First operand 184 states and 214 transitions. Second operand 34 states. [2020-10-14 23:46:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:21,534 INFO L93 Difference]: Finished difference Result 316 states and 378 transitions. [2020-10-14 23:46:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 23:46:21,535 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 183 [2020-10-14 23:46:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:21,537 INFO L225 Difference]: With dead ends: 316 [2020-10-14 23:46:21,537 INFO L226 Difference]: Without dead ends: 192 [2020-10-14 23:46:21,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=779, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:46:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-14 23:46:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-10-14 23:46:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-14 23:46:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 221 transitions. [2020-10-14 23:46:21,562 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 221 transitions. Word has length 183 [2020-10-14 23:46:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:21,563 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 221 transitions. [2020-10-14 23:46:21,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 23:46:21,563 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 221 transitions. [2020-10-14 23:46:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-14 23:46:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:21,565 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:21,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 23:46:21,566 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash 125259151, now seen corresponding path program 29 times [2020-10-14 23:46:21,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:21,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925756283] [2020-10-14 23:46:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:21,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:23,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:26,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:26,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-14 23:46:26,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-14 23:46:26,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:27,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:27,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:27,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:27,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:27,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:27,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:46:27,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:27,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:27,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:27,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:27,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:27,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:46:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-14 23:46:27,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925756283] [2020-10-14 23:46:27,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:27,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 23:46:27,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827422376] [2020-10-14 23:46:27,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 23:46:27,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 23:46:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:46:27,443 INFO L87 Difference]: Start difference. First operand 190 states and 221 transitions. Second operand 35 states. [2020-10-14 23:46:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:27,962 INFO L93 Difference]: Finished difference Result 326 states and 390 transitions. [2020-10-14 23:46:27,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 23:46:27,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 189 [2020-10-14 23:46:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:27,965 INFO L225 Difference]: With dead ends: 326 [2020-10-14 23:46:27,965 INFO L226 Difference]: Without dead ends: 198 [2020-10-14 23:46:27,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:46:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-14 23:46:27,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2020-10-14 23:46:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-14 23:46:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 228 transitions. [2020-10-14 23:46:27,976 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 228 transitions. Word has length 189 [2020-10-14 23:46:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:27,976 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 228 transitions. [2020-10-14 23:46:27,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 23:46:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 228 transitions. [2020-10-14 23:46:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-14 23:46:27,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:27,978 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:27,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 23:46:27,978 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:27,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:27,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1578448040, now seen corresponding path program 30 times [2020-10-14 23:46:27,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:27,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384834543] [2020-10-14 23:46:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:28,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:29,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:33,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:33,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-14 23:46:33,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:33,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-14 23:46:33,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:33,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 23:46:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 23:46:33,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-14 23:46:33,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:33,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:33,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:33,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:33,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:33,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:33,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:33,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:33,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:33,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:33,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-14 23:46:33,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384834543] [2020-10-14 23:46:33,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:33,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 23:46:33,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337916828] [2020-10-14 23:46:33,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 23:46:33,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 23:46:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 23:46:33,808 INFO L87 Difference]: Start difference. First operand 196 states and 228 transitions. Second operand 36 states. [2020-10-14 23:46:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:34,342 INFO L93 Difference]: Finished difference Result 336 states and 402 transitions. [2020-10-14 23:46:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 23:46:34,343 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 195 [2020-10-14 23:46:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:34,345 INFO L225 Difference]: With dead ends: 336 [2020-10-14 23:46:34,346 INFO L226 Difference]: Without dead ends: 204 [2020-10-14 23:46:34,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=544, Invalid=862, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:46:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-14 23:46:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-14 23:46:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-14 23:46:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 235 transitions. [2020-10-14 23:46:34,354 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 235 transitions. Word has length 195 [2020-10-14 23:46:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:34,354 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 235 transitions. [2020-10-14 23:46:34,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 23:46:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 235 transitions. [2020-10-14 23:46:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-14 23:46:34,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:34,356 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:34,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 23:46:34,357 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1931311297, now seen corresponding path program 31 times [2020-10-14 23:46:34,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:34,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942697676] [2020-10-14 23:46:34,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:34,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:39,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:39,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-14 23:46:39,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:39,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 23:46:39,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:39,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 23:46:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-14 23:46:39,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-14 23:46:39,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:40,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:40,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:40,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:40,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:40,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:40,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:40,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:40,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:40,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:40,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-14 23:46:40,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942697676] [2020-10-14 23:46:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:40,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 23:46:40,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218833908] [2020-10-14 23:46:40,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 23:46:40,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 23:46:40,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:46:40,193 INFO L87 Difference]: Start difference. First operand 202 states and 235 transitions. Second operand 37 states. [2020-10-14 23:46:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:40,733 INFO L93 Difference]: Finished difference Result 346 states and 414 transitions. [2020-10-14 23:46:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 23:46:40,735 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 201 [2020-10-14 23:46:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:40,737 INFO L225 Difference]: With dead ends: 346 [2020-10-14 23:46:40,737 INFO L226 Difference]: Without dead ends: 210 [2020-10-14 23:46:40,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=577, Invalid=905, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:46:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-14 23:46:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-10-14 23:46:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-14 23:46:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 242 transitions. [2020-10-14 23:46:40,746 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 242 transitions. Word has length 201 [2020-10-14 23:46:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:40,746 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 242 transitions. [2020-10-14 23:46:40,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 23:46:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 242 transitions. [2020-10-14 23:46:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-14 23:46:40,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:40,748 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:40,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 23:46:40,749 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1492747814, now seen corresponding path program 32 times [2020-10-14 23:46:40,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:40,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052337582] [2020-10-14 23:46:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:40,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:45,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-14 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-14 23:46:45,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:46,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:46,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:46,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:46,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:46,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:46,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:46,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:46,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:46,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:46,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-14 23:46:46,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052337582] [2020-10-14 23:46:46,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:46,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 23:46:46,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037422298] [2020-10-14 23:46:46,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 23:46:46,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 23:46:46,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 23:46:46,626 INFO L87 Difference]: Start difference. First operand 208 states and 242 transitions. Second operand 38 states. [2020-10-14 23:46:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:47,233 INFO L93 Difference]: Finished difference Result 356 states and 426 transitions. [2020-10-14 23:46:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 23:46:47,233 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 207 [2020-10-14 23:46:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:47,235 INFO L225 Difference]: With dead ends: 356 [2020-10-14 23:46:47,235 INFO L226 Difference]: Without dead ends: 216 [2020-10-14 23:46:47,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=611, Invalid=949, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:46:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-14 23:46:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2020-10-14 23:46:47,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 23:46:47,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 249 transitions. [2020-10-14 23:46:47,246 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 249 transitions. Word has length 207 [2020-10-14 23:46:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:47,248 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 249 transitions. [2020-10-14 23:46:47,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 23:46:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 249 transitions. [2020-10-14 23:46:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-14 23:46:47,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:47,250 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:47,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 23:46:47,251 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash 183408627, now seen corresponding path program 33 times [2020-10-14 23:46:47,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:47,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480472933] [2020-10-14 23:46:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:47,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:49,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:52,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:52,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-14 23:46:52,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:53,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:53,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:53,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:53,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-14 23:46:53,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480472933] [2020-10-14 23:46:53,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:53,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 23:46:53,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296208033] [2020-10-14 23:46:53,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 23:46:53,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 23:46:53,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:46:53,192 INFO L87 Difference]: Start difference. First operand 214 states and 249 transitions. Second operand 39 states. [2020-10-14 23:46:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:46:53,735 INFO L93 Difference]: Finished difference Result 366 states and 438 transitions. [2020-10-14 23:46:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 23:46:53,736 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 213 [2020-10-14 23:46:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:46:53,738 INFO L225 Difference]: With dead ends: 366 [2020-10-14 23:46:53,738 INFO L226 Difference]: Without dead ends: 222 [2020-10-14 23:46:53,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=646, Invalid=994, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:46:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-14 23:46:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2020-10-14 23:46:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-14 23:46:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 256 transitions. [2020-10-14 23:46:53,746 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 256 transitions. Word has length 213 [2020-10-14 23:46:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:46:53,747 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 256 transitions. [2020-10-14 23:46:53,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 23:46:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 256 transitions. [2020-10-14 23:46:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-14 23:46:53,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:46:53,749 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:46:53,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 23:46:53,749 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:46:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:46:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1251750668, now seen corresponding path program 34 times [2020-10-14 23:46:53,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:46:53,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106862301] [2020-10-14 23:46:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:46:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:53,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:58,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:58,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-14 23:46:58,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:46:58,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-14 23:46:58,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:58,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 23:46:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-14 23:46:58,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-14 23:46:58,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:59,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:46:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:46:59,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:46:59,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:46:59,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:46:59,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:46:59,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:46:59,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:46:59,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:46:59,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:46:59,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:46:59,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:46:59,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:46:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-14 23:46:59,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106862301] [2020-10-14 23:46:59,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:46:59,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 23:46:59,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940587968] [2020-10-14 23:46:59,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 23:46:59,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:46:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 23:46:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 23:46:59,780 INFO L87 Difference]: Start difference. First operand 220 states and 256 transitions. Second operand 40 states. [2020-10-14 23:47:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:00,288 INFO L93 Difference]: Finished difference Result 376 states and 450 transitions. [2020-10-14 23:47:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 23:47:00,288 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-10-14 23:47:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:00,290 INFO L225 Difference]: With dead ends: 376 [2020-10-14 23:47:00,290 INFO L226 Difference]: Without dead ends: 228 [2020-10-14 23:47:00,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=682, Invalid=1040, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:47:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-14 23:47:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2020-10-14 23:47:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-14 23:47:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 263 transitions. [2020-10-14 23:47:00,299 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 263 transitions. Word has length 219 [2020-10-14 23:47:00,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:00,299 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 263 transitions. [2020-10-14 23:47:00,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 23:47:00,299 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 263 transitions. [2020-10-14 23:47:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-14 23:47:00,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:00,301 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:00,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 23:47:00,301 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:00,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:00,302 INFO L82 PathProgramCache]: Analyzing trace with hash 377334565, now seen corresponding path program 35 times [2020-10-14 23:47:00,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:00,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138353786] [2020-10-14 23:47:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:00,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:00,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:05,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-14 23:47:05,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-14 23:47:05,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:06,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:06,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:06,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-14 23:47:06,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138353786] [2020-10-14 23:47:06,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:06,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 23:47:06,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63491067] [2020-10-14 23:47:06,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 23:47:06,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 23:47:06,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:47:06,350 INFO L87 Difference]: Start difference. First operand 226 states and 263 transitions. Second operand 41 states. [2020-10-14 23:47:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:06,914 INFO L93 Difference]: Finished difference Result 386 states and 462 transitions. [2020-10-14 23:47:06,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 23:47:06,915 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 225 [2020-10-14 23:47:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:06,917 INFO L225 Difference]: With dead ends: 386 [2020-10-14 23:47:06,917 INFO L226 Difference]: Without dead ends: 234 [2020-10-14 23:47:06,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=719, Invalid=1087, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:47:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-14 23:47:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-14 23:47:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-14 23:47:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 270 transitions. [2020-10-14 23:47:06,926 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 270 transitions. Word has length 225 [2020-10-14 23:47:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:06,926 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 270 transitions. [2020-10-14 23:47:06,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 23:47:06,927 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 270 transitions. [2020-10-14 23:47:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-14 23:47:06,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:06,928 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:06,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 23:47:06,928 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash 229204030, now seen corresponding path program 36 times [2020-10-14 23:47:06,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:06,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375839153] [2020-10-14 23:47:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:06,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:09,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:11,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:11,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-14 23:47:11,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:12,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:12,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:12,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:12,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:12,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:12,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:12,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:12,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:12,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:12,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:12,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:12,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:47:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-14 23:47:13,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375839153] [2020-10-14 23:47:13,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:13,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 23:47:13,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597784250] [2020-10-14 23:47:13,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 23:47:13,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 23:47:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 23:47:13,007 INFO L87 Difference]: Start difference. First operand 232 states and 270 transitions. Second operand 42 states. [2020-10-14 23:47:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:13,619 INFO L93 Difference]: Finished difference Result 396 states and 474 transitions. [2020-10-14 23:47:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 23:47:13,620 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 231 [2020-10-14 23:47:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:13,622 INFO L225 Difference]: With dead ends: 396 [2020-10-14 23:47:13,622 INFO L226 Difference]: Without dead ends: 240 [2020-10-14 23:47:13,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=1135, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:47:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-14 23:47:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2020-10-14 23:47:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-14 23:47:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 277 transitions. [2020-10-14 23:47:13,629 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 277 transitions. Word has length 231 [2020-10-14 23:47:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:13,630 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 277 transitions. [2020-10-14 23:47:13,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 23:47:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 277 transitions. [2020-10-14 23:47:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-14 23:47:13,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:13,632 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:13,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 23:47:13,632 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:13,632 INFO L82 PathProgramCache]: Analyzing trace with hash 668840535, now seen corresponding path program 37 times [2020-10-14 23:47:13,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:13,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072749686] [2020-10-14 23:47:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:16,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:18,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:18,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-14 23:47:18,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:18,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 23:47:18,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:18,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 23:47:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-14 23:47:18,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-14 23:47:18,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:19,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:19,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:19,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-14 23:47:19,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072749686] [2020-10-14 23:47:19,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:19,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 23:47:19,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878261032] [2020-10-14 23:47:19,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 23:47:19,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:19,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 23:47:19,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:47:19,750 INFO L87 Difference]: Start difference. First operand 238 states and 277 transitions. Second operand 43 states. [2020-10-14 23:47:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:20,388 INFO L93 Difference]: Finished difference Result 406 states and 486 transitions. [2020-10-14 23:47:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 23:47:20,389 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 237 [2020-10-14 23:47:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:20,391 INFO L225 Difference]: With dead ends: 406 [2020-10-14 23:47:20,391 INFO L226 Difference]: Without dead ends: 246 [2020-10-14 23:47:20,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=796, Invalid=1184, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:47:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-14 23:47:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2020-10-14 23:47:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-14 23:47:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2020-10-14 23:47:20,399 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 237 [2020-10-14 23:47:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:20,400 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2020-10-14 23:47:20,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 23:47:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2020-10-14 23:47:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-14 23:47:20,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:20,401 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:20,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 23:47:20,402 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:20,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1618935440, now seen corresponding path program 38 times [2020-10-14 23:47:20,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:20,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895286637] [2020-10-14 23:47:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:20,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:23,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:25,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:25,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-14 23:47:25,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:25,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 23:47:25,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:25,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:25,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 23:47:25,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-14 23:47:25,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-14 23:47:25,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:26,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:26,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:26,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:26,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-14 23:47:26,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895286637] [2020-10-14 23:47:26,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:26,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 23:47:26,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373240561] [2020-10-14 23:47:26,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 23:47:26,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 23:47:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 23:47:26,552 INFO L87 Difference]: Start difference. First operand 244 states and 284 transitions. Second operand 44 states. [2020-10-14 23:47:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:27,090 INFO L93 Difference]: Finished difference Result 416 states and 498 transitions. [2020-10-14 23:47:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 23:47:27,091 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 243 [2020-10-14 23:47:27,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:27,093 INFO L225 Difference]: With dead ends: 416 [2020-10-14 23:47:27,093 INFO L226 Difference]: Without dead ends: 252 [2020-10-14 23:47:27,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=836, Invalid=1234, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:47:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-14 23:47:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 250. [2020-10-14 23:47:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-14 23:47:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 291 transitions. [2020-10-14 23:47:27,101 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 291 transitions. Word has length 243 [2020-10-14 23:47:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:27,102 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 291 transitions. [2020-10-14 23:47:27,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 23:47:27,102 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 291 transitions. [2020-10-14 23:47:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-14 23:47:27,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:27,104 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:27,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 23:47:27,104 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1537322377, now seen corresponding path program 39 times [2020-10-14 23:47:27,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:27,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549314086] [2020-10-14 23:47:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:27,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:32,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-14 23:47:32,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 23:47:32,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:33,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:33,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:33,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:33,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-14 23:47:33,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549314086] [2020-10-14 23:47:33,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:33,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 23:47:33,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490765211] [2020-10-14 23:47:33,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 23:47:33,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:33,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 23:47:33,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:47:33,325 INFO L87 Difference]: Start difference. First operand 250 states and 291 transitions. Second operand 45 states. [2020-10-14 23:47:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:33,997 INFO L93 Difference]: Finished difference Result 426 states and 510 transitions. [2020-10-14 23:47:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 23:47:33,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 249 [2020-10-14 23:47:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:34,000 INFO L225 Difference]: With dead ends: 426 [2020-10-14 23:47:34,000 INFO L226 Difference]: Without dead ends: 258 [2020-10-14 23:47:34,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=877, Invalid=1285, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:47:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-14 23:47:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-10-14 23:47:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-14 23:47:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 298 transitions. [2020-10-14 23:47:34,009 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 298 transitions. Word has length 249 [2020-10-14 23:47:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:34,010 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 298 transitions. [2020-10-14 23:47:34,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 23:47:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 298 transitions. [2020-10-14 23:47:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-14 23:47:34,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:34,012 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:34,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 23:47:34,012 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:34,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:34,012 INFO L82 PathProgramCache]: Analyzing trace with hash -638183774, now seen corresponding path program 40 times [2020-10-14 23:47:34,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:34,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698880465] [2020-10-14 23:47:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:34,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:39,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:39,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-14 23:47:39,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:39,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-14 23:47:39,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:39,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 23:47:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-14 23:47:39,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-14 23:47:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:40,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:40,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:40,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:40,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:40,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-14 23:47:40,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698880465] [2020-10-14 23:47:40,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:40,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 23:47:40,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186592286] [2020-10-14 23:47:40,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 23:47:40,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 23:47:40,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 23:47:40,345 INFO L87 Difference]: Start difference. First operand 256 states and 298 transitions. Second operand 46 states. [2020-10-14 23:47:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:41,012 INFO L93 Difference]: Finished difference Result 436 states and 522 transitions. [2020-10-14 23:47:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 23:47:41,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 255 [2020-10-14 23:47:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:41,015 INFO L225 Difference]: With dead ends: 436 [2020-10-14 23:47:41,015 INFO L226 Difference]: Without dead ends: 264 [2020-10-14 23:47:41,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=919, Invalid=1337, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:47:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-14 23:47:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2020-10-14 23:47:41,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-14 23:47:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2020-10-14 23:47:41,023 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 255 [2020-10-14 23:47:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:41,023 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2020-10-14 23:47:41,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 23:47:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2020-10-14 23:47:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-14 23:47:41,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:41,025 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:41,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 23:47:41,025 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:41,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1730372421, now seen corresponding path program 41 times [2020-10-14 23:47:41,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:41,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428841914] [2020-10-14 23:47:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:41,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:45,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:46,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-14 23:47:46,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-14 23:47:46,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:47,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:47,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:47,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:47,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2020-10-14 23:47:47,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428841914] [2020-10-14 23:47:47,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:47,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 23:47:47,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439893960] [2020-10-14 23:47:47,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 23:47:47,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:47,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 23:47:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 23:47:47,360 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand 47 states. [2020-10-14 23:47:48,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:48,045 INFO L93 Difference]: Finished difference Result 446 states and 534 transitions. [2020-10-14 23:47:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 23:47:48,045 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 261 [2020-10-14 23:47:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:48,048 INFO L225 Difference]: With dead ends: 446 [2020-10-14 23:47:48,048 INFO L226 Difference]: Without dead ends: 270 [2020-10-14 23:47:48,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=962, Invalid=1390, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:47:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-14 23:47:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 268. [2020-10-14 23:47:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-14 23:47:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 312 transitions. [2020-10-14 23:47:48,057 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 312 transitions. Word has length 261 [2020-10-14 23:47:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:48,057 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 312 transitions. [2020-10-14 23:47:48,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 23:47:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 312 transitions. [2020-10-14 23:47:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-14 23:47:48,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:48,059 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:48,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 23:47:48,060 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:48,060 INFO L82 PathProgramCache]: Analyzing trace with hash 22781908, now seen corresponding path program 42 times [2020-10-14 23:47:48,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:48,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004848764] [2020-10-14 23:47:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:48,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:52,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:53,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:53,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-14 23:47:53,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:47:53,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 23:47:53,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:53,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:53,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:47:53,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-14 23:47:53,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-14 23:47:53,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:47:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:54,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:54,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:47:54,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:47:54,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:47:54,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:47:54,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:47:54,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:47:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:47:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:47:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:47:54,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:47:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2020-10-14 23:47:54,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004848764] [2020-10-14 23:47:54,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:47:54,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 23:47:54,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156041616] [2020-10-14 23:47:54,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 23:47:54,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:47:54,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 23:47:54,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:47:54,469 INFO L87 Difference]: Start difference. First operand 268 states and 312 transitions. Second operand 48 states. [2020-10-14 23:47:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:47:55,148 INFO L93 Difference]: Finished difference Result 456 states and 546 transitions. [2020-10-14 23:47:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 23:47:55,149 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 267 [2020-10-14 23:47:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:47:55,152 INFO L225 Difference]: With dead ends: 456 [2020-10-14 23:47:55,152 INFO L226 Difference]: Without dead ends: 276 [2020-10-14 23:47:55,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1006, Invalid=1444, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 23:47:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-14 23:47:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 274. [2020-10-14 23:47:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-14 23:47:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 319 transitions. [2020-10-14 23:47:55,160 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 319 transitions. Word has length 267 [2020-10-14 23:47:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:47:55,160 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 319 transitions. [2020-10-14 23:47:55,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 23:47:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 319 transitions. [2020-10-14 23:47:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-14 23:47:55,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:47:55,162 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:47:55,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 23:47:55,163 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:47:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:47:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash -786333715, now seen corresponding path program 43 times [2020-10-14 23:47:55,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:47:55,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918862213] [2020-10-14 23:47:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:47:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:47:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:47:59,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:00,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:00,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-14 23:48:00,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:00,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-14 23:48:00,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:00,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 23:48:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-14 23:48:00,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 181 [2020-10-14 23:48:00,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:01,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:01,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:48:01,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:01,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:01,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:01,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:01,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:01,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2020-10-14 23:48:01,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918862213] [2020-10-14 23:48:01,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:01,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 23:48:01,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747533514] [2020-10-14 23:48:01,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 23:48:01,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:01,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 23:48:01,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 23:48:01,635 INFO L87 Difference]: Start difference. First operand 274 states and 319 transitions. Second operand 49 states. [2020-10-14 23:48:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:02,317 INFO L93 Difference]: Finished difference Result 466 states and 558 transitions. [2020-10-14 23:48:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 23:48:02,318 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 273 [2020-10-14 23:48:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:02,320 INFO L225 Difference]: With dead ends: 466 [2020-10-14 23:48:02,320 INFO L226 Difference]: Without dead ends: 282 [2020-10-14 23:48:02,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1051, Invalid=1499, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 23:48:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-14 23:48:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-10-14 23:48:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-14 23:48:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 326 transitions. [2020-10-14 23:48:02,328 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 326 transitions. Word has length 273 [2020-10-14 23:48:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:02,328 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 326 transitions. [2020-10-14 23:48:02,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 23:48:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 326 transitions. [2020-10-14 23:48:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-14 23:48:02,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:02,330 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:02,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 23:48:02,331 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:02,331 INFO L82 PathProgramCache]: Analyzing trace with hash 75799814, now seen corresponding path program 44 times [2020-10-14 23:48:02,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:02,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936659599] [2020-10-14 23:48:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:02,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:07,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:07,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-14 23:48:07,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:07,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-14 23:48:07,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:07,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:07,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 23:48:07,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:48:07,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-14 23:48:07,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:08,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:08,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:08,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:08,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:48:08,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:08,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:08,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:08,729 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:08,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:48:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2020-10-14 23:48:08,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936659599] [2020-10-14 23:48:08,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:08,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 23:48:08,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382038114] [2020-10-14 23:48:08,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 23:48:08,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 23:48:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:48:08,766 INFO L87 Difference]: Start difference. First operand 280 states and 326 transitions. Second operand 48 states. [2020-10-14 23:48:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:09,466 INFO L93 Difference]: Finished difference Result 474 states and 568 transitions. [2020-10-14 23:48:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 23:48:09,466 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 279 [2020-10-14 23:48:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:09,471 INFO L225 Difference]: With dead ends: 474 [2020-10-14 23:48:09,471 INFO L226 Difference]: Without dead ends: 289 [2020-10-14 23:48:09,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 23:48:09,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-14 23:48:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 282. [2020-10-14 23:48:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 23:48:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2020-10-14 23:48:09,481 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 279 [2020-10-14 23:48:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:09,481 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2020-10-14 23:48:09,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 23:48:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2020-10-14 23:48:09,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-14 23:48:09,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:09,483 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:09,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 23:48:09,484 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:09,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2049407196, now seen corresponding path program 45 times [2020-10-14 23:48:09,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:09,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277652264] [2020-10-14 23:48:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:09,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking...