/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:57:49,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:57:49,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:57:49,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:57:49,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:57:49,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:57:49,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:57:49,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:57:49,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:57:49,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:57:49,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:57:49,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:57:49,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:57:49,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:57:49,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:57:49,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:57:49,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:57:49,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:57:49,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:57:49,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:57:49,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:57:49,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:57:49,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:57:49,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:57:49,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:57:49,679 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:57:49,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:57:49,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:57:49,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:57:49,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:57:49,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:57:49,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:57:49,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:57:49,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:57:49,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:57:49,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:57:49,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:57:49,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:57:49,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:57:49,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:57:49,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:57:49,695 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 [2020-10-28 14:57:49,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:57:49,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:57:49,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:57:49,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:57:49,761 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:57:49,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:57:49,761 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:57:49,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:57:49,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:57:49,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:57:49,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:57:49,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:57:49,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:57:49,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:57:49,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:57:49,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:57:49,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:57:49,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:57:49,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:57:49,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:57:49,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:57:49,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:57:49,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:57:49,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:57:49,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:57:49,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:57:49,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:57:49,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:57:49,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:57:49,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:57:50,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:57:50,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:57:50,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:57:50,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:57:50,272 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:57:50,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2020-10-28 14:57:50,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e98a1feb8/63cf9232d9bb4a49a0f2aece1c2543f5/FLAG707b72b01 [2020-10-28 14:57:51,065 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:57:51,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2020-10-28 14:57:51,075 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e98a1feb8/63cf9232d9bb4a49a0f2aece1c2543f5/FLAG707b72b01 [2020-10-28 14:57:51,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e98a1feb8/63cf9232d9bb4a49a0f2aece1c2543f5 [2020-10-28 14:57:51,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:57:51,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:57:51,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:51,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:57:51,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:57:51,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4e0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51, skipping insertion in model container [2020-10-28 14:57:51,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:57:51,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:57:51,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:51,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:57:51,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:51,691 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:57:51,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51 WrapperNode [2020-10-28 14:57:51,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:51,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:57:51,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:57:51,693 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:57:51,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (1/1) ... [2020-10-28 14:57:51,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:57:51,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:57:51,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:57:51,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:57:51,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (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 [2020-10-28 14:57:51,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:57:51,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:57:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:57:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:57:51,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:57:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:57:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:57:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:57:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:57:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:57:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:57:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:57:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:57:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:57:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:57:51,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:57:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:57:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:57:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:57:54,304 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:57:54,305 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:57:54,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:54 BoogieIcfgContainer [2020-10-28 14:57:54,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:57:54,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:57:54,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:57:54,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:57:54,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:57:51" (1/3) ... [2020-10-28 14:57:54,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5a819f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:54, skipping insertion in model container [2020-10-28 14:57:54,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:51" (2/3) ... [2020-10-28 14:57:54,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5a819f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:54, skipping insertion in model container [2020-10-28 14:57:54,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:54" (3/3) ... [2020-10-28 14:57:54,322 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2020-10-28 14:57:54,346 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:57:54,356 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:57:54,388 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:57:54,433 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:57:54,433 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:57:54,433 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:57:54,434 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:57:54,434 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:57:54,434 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:57:54,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:57:54,434 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:57:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-10-28 14:57:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:57:54,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:54,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:54,472 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:54,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1462675887, now seen corresponding path program 1 times [2020-10-28 14:57:54,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:54,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085900661] [2020-10-28 14:57:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:54,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:54,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:57:54,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:54,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-28 14:57:54,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:54,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:54,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:54,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:57:54,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:54,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:54,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:54,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:54,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:54,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:57:54,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:54,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:54,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:54,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:54,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:54,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:55,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085900661] [2020-10-28 14:57:55,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:55,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:57:55,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743899491] [2020-10-28 14:57:55,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:57:55,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:55,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:57:55,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:55,036 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-10-28 14:57:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:55,140 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-10-28 14:57:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:57:55,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-28 14:57:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:55,152 INFO L225 Difference]: With dead ends: 53 [2020-10-28 14:57:55,152 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:57:55,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:57:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:57:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:57:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 14:57:55,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-28 14:57:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:55,203 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 14:57:55,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:57:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 14:57:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:57:55,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:55,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:55,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:57:55,206 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:55,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1653210379, now seen corresponding path program 1 times [2020-10-28 14:57:55,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:55,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247768839] [2020-10-28 14:57:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:55,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:55,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:55,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:57:55,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:55,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-28 14:57:55,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:55,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:55,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:57:55,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:55,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:57:55,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:55,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:55,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:55,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:55,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:55,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:55,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:57:55,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:55,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:55,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:55,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247768839] [2020-10-28 14:57:55,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:55,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:57:55,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044416304] [2020-10-28 14:57:55,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:57:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:55,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:57:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:55,582 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-28 14:57:57,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:57,775 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-28 14:57:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:57:57,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:57:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:57,777 INFO L225 Difference]: With dead ends: 47 [2020-10-28 14:57:57,778 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 14:57:57,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 14:57:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-10-28 14:57:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 14:57:57,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-28 14:57:57,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2020-10-28 14:57:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:57,792 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-28 14:57:57,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:57:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-28 14:57:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:57:57,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:57,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:57,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:57:57,794 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:57,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash -337626729, now seen corresponding path program 1 times [2020-10-28 14:57:57,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:57,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379209239] [2020-10-28 14:57:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:57,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:58,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:58,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:57:58,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:58,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 708 [2020-10-28 14:57:58,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:58,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:57:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:58,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:57:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:58,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:58,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:58,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:58,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:58,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:58,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:57:58,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:58,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:58,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:58,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:58,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379209239] [2020-10-28 14:57:58,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:58,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:57:58,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259444098] [2020-10-28 14:57:58,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:57:58,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:57:58,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:58,645 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-28 14:58:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:00,868 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-10-28 14:58:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:58:00,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-28 14:58:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:00,870 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:58:00,871 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:58:00,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:58:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:58:00,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-28 14:58:00,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 14:58:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 14:58:00,880 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2020-10-28 14:58:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:00,880 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 14:58:00,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:58:00,881 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 14:58:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 14:58:00,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:00,882 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:00,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:58:00,882 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1217875897, now seen corresponding path program 2 times [2020-10-28 14:58:00,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:00,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7163938] [2020-10-28 14:58:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:00,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:00,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:01,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:58:01,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:01,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-28 14:58:01,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:01,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:01,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:58:01,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:01,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:01,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:01,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:01,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:01,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:01,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:01,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:01,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:01,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:01,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:01,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:01,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7163938] [2020-10-28 14:58:01,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:01,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 14:58:01,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124095551] [2020-10-28 14:58:01,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:58:01,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:58:01,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:58:01,652 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-28 14:58:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:03,859 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-28 14:58:03,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:58:03,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-28 14:58:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:03,861 INFO L225 Difference]: With dead ends: 63 [2020-10-28 14:58:03,861 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 14:58:03,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:58:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 14:58:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2020-10-28 14:58:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:58:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-28 14:58:03,870 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2020-10-28 14:58:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:03,871 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-28 14:58:03,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:58:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-28 14:58:03,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:58:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:03,872 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:03,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:58:03,872 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1407280475, now seen corresponding path program 3 times [2020-10-28 14:58:03,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:03,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590212648] [2020-10-28 14:58:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:03,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:05,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:05,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:58:05,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:05,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-28 14:58:05,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:05,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:58:05,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:05,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:58:05,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:05,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:05,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:05,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:05,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:05,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:05,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:05,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:05,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:05,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:05,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:05,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:05,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:05,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590212648] [2020-10-28 14:58:05,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:05,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:58:05,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955100311] [2020-10-28 14:58:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:58:05,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:58:05,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:58:05,365 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 7 states. [2020-10-28 14:58:07,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:07,691 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-10-28 14:58:07,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:58:07,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-28 14:58:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:07,695 INFO L225 Difference]: With dead ends: 77 [2020-10-28 14:58:07,695 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:58:07,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:58:07,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:58:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-28 14:58:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:58:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-28 14:58:07,708 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 22 [2020-10-28 14:58:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:07,708 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-28 14:58:07,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:58:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-28 14:58:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:58:07,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:07,710 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:07,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:58:07,710 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1258513795, now seen corresponding path program 4 times [2020-10-28 14:58:07,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:07,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488366605] [2020-10-28 14:58:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:07,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:09,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:58:09,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:09,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2044 [2020-10-28 14:58:09,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:09,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:09,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:58:09,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:09,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:58:09,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:09,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:09,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:09,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:09,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:09,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:09,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:09,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:09,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:58:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:58:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488366605] [2020-10-28 14:58:09,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:09,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:58:09,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631722678] [2020-10-28 14:58:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:58:09,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:58:09,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:58:09,911 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 8 states. [2020-10-28 14:58:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:10,194 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-10-28 14:58:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:58:10,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-28 14:58:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:10,199 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:58:10,199 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 14:58:10,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:58:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 14:58:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-28 14:58:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 14:58:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-28 14:58:10,218 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 24 [2020-10-28 14:58:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:10,219 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-28 14:58:10,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:58:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-28 14:58:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:58:10,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:10,220 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:10,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:58:10,221 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1008668447, now seen corresponding path program 5 times [2020-10-28 14:58:10,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:10,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121536847] [2020-10-28 14:58:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:10,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:10,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:13,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:13,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 14:58:13,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:13,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2881 [2020-10-28 14:58:13,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:13,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:13,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:58:13,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:13,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:58:13,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:13,586 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2020-10-28 14:58:13,895 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 21 [2020-10-28 14:58:14,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:14,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:14,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:14,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:14,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:14,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:14,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:14,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:14,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:14,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:58:14,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121536847] [2020-10-28 14:58:14,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:14,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:58:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700708222] [2020-10-28 14:58:14,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:58:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:58:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:58:14,031 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 10 states. [2020-10-28 14:58:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:16,477 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-28 14:58:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:58:16,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:58:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:16,479 INFO L225 Difference]: With dead ends: 58 [2020-10-28 14:58:16,479 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:58:16,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:58:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:58:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 14:58:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 14:58:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-28 14:58:16,490 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 26 [2020-10-28 14:58:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:16,491 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-28 14:58:16,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:58:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-28 14:58:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:58:16,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:16,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:16,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:58:16,492 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2125805118, now seen corresponding path program 1 times [2020-10-28 14:58:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:16,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461544025] [2020-10-28 14:58:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:16,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:16,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:19,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:19,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:58:19,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:19,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3452 [2020-10-28 14:58:19,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:19,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:58:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:19,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:58:19,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:58:20,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:20,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:20,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:20,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:20,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:20,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:20,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:20,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:20,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:20,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:20,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:20,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:58:20,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 14:58:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:20,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:20,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:20,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:20,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:20,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:20,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:20,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:20,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:20,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:20,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:58:20,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461544025] [2020-10-28 14:58:20,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:20,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:58:20,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190529593] [2020-10-28 14:58:20,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:58:20,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:20,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:58:20,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:58:20,127 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2020-10-28 14:58:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:22,545 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-28 14:58:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:58:22,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-28 14:58:22,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:22,547 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:58:22,547 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:58:22,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:58:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:58:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-10-28 14:58:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:58:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-28 14:58:22,558 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 35 [2020-10-28 14:58:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:22,560 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-28 14:58:22,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:58:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-28 14:58:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:58:22,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:22,562 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:22,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:58:22,562 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:22,563 INFO L82 PathProgramCache]: Analyzing trace with hash -297632800, now seen corresponding path program 2 times [2020-10-28 14:58:22,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:22,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404183563] [2020-10-28 14:58:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:22,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:22,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:27,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:27,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:58:27,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:27,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 14:58:27,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:27,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:58:27,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:27,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:58:27,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:27,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:27,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:27,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:27,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:27,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:58:27,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:27,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:27,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:58:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:27,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:27,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:27,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:58:27,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:27,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:27,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:27,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:58:27,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404183563] [2020-10-28 14:58:27,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:27,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:58:27,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59732556] [2020-10-28 14:58:27,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:58:27,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:27,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:58:27,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:58:27,812 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 10 states. [2020-10-28 14:58:28,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:28,258 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2020-10-28 14:58:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:58:28,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-28 14:58:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:28,259 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:58:28,260 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:58:28,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:58:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:58:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-28 14:58:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:58:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-28 14:58:28,289 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 37 [2020-10-28 14:58:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:28,289 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-28 14:58:28,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:58:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-28 14:58:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:58:28,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:28,292 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:28,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:58:28,293 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -65659266, now seen corresponding path program 3 times [2020-10-28 14:58:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:28,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603609829] [2020-10-28 14:58:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:28,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:33,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:33,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:58:33,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:33,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 14:58:33,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:33,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:33,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:58:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:33,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 14:58:33,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:33,746 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2020-10-28 14:58:33,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:33,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:33,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:33,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:33,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:33,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:33,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:33,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:33,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:33,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:33,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:33,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:33,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 14:58:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:33,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:33,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:33,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:33,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:33,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:58:33,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:33,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:33,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:33,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:58:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603609829] [2020-10-28 14:58:33,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:33,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:58:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351855593] [2020-10-28 14:58:33,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:58:33,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:58:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:58:33,881 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 11 states. [2020-10-28 14:58:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:40,452 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-10-28 14:58:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:58:40,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-28 14:58:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:40,454 INFO L225 Difference]: With dead ends: 76 [2020-10-28 14:58:40,455 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:58:40,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:58:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:58:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 14:58:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:58:40,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-28 14:58:40,465 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 39 [2020-10-28 14:58:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:40,465 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-28 14:58:40,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:58:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-28 14:58:40,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:58:40,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:40,471 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:40,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:58:40,471 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash -536731393, now seen corresponding path program 1 times [2020-10-28 14:58:40,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:40,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145685717] [2020-10-28 14:58:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:40,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:41,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:45,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:45,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:58:45,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:45,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 14:58:45,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:45,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:58:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:45,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:58:45,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:45,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:45,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:45,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:45,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:45,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:45,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:45,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:45,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:45,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:45,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:45,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:45,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 14:58:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:45,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:45,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:45,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:58:45,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:45,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:45,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:45,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 14:58:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:45,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:45,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:45,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:45,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:45,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:58:45,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:45,707 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:45,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:58:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:58:45,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145685717] [2020-10-28 14:58:45,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:45,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:58:45,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73730586] [2020-10-28 14:58:45,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:58:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:58:45,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:58:45,719 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 11 states. [2020-10-28 14:58:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:48,309 INFO L93 Difference]: Finished difference Result 141 states and 159 transitions. [2020-10-28 14:58:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:58:48,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-28 14:58:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:48,311 INFO L225 Difference]: With dead ends: 141 [2020-10-28 14:58:48,311 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 14:58:48,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:58:48,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 14:58:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-28 14:58:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:58:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2020-10-28 14:58:48,324 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 48 [2020-10-28 14:58:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:48,324 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2020-10-28 14:58:48,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:58:48,325 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2020-10-28 14:58:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:58:48,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:48,326 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:48,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:58:48,326 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:48,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:48,327 INFO L82 PathProgramCache]: Analyzing trace with hash 714690465, now seen corresponding path program 2 times [2020-10-28 14:58:48,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:48,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630637392] [2020-10-28 14:58:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:48,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:48,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:53,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:53,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:58:53,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:58:53,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 14:58:53,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:53,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:58:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:58:53,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 14:58:53,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:53,899 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2020-10-28 14:58:54,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:58:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:54,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:54,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:54,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:58:54,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:58:54,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:54,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:58:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:54,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:58:54,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:54,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 14:58:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:54,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:54,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:54,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:54,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:54,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:58:54,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:54,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:54,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:54,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:54,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 14:58:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:54,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:54,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:58:54,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:58:54,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:58:54,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:58:54,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:58:54,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:58:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:58:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:58:54,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:58:54,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:58:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-28 14:58:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630637392] [2020-10-28 14:58:54,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:58:54,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:58:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546848112] [2020-10-28 14:58:54,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:58:54,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:58:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:58:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:58:54,060 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 13 states. [2020-10-28 14:58:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:58:58,859 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2020-10-28 14:58:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:58:58,860 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-28 14:58:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:58:58,861 INFO L225 Difference]: With dead ends: 87 [2020-10-28 14:58:58,861 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:58:58,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:58:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:58:58,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-28 14:58:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:58:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2020-10-28 14:58:58,873 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 50 [2020-10-28 14:58:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:58:58,873 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2020-10-28 14:58:58,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:58:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2020-10-28 14:58:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 14:58:58,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:58:58,875 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:58:58,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:58:58,875 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:58:58,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:58:58,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1515979904, now seen corresponding path program 3 times [2020-10-28 14:58:58,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:58:58,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139304693] [2020-10-28 14:58:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:58:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:58:58,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:58:59,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:03,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:03,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 14:59:03,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:03,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:59:03,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:03,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:03,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:59:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:03,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:59:03,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:04,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:04,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:04,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:04,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:04,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:04,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:04,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:04,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:04,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:04,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:04,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:04,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:04,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 14:59:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:04,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:04,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:04,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:04,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:04,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:04,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:04,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:04,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:59:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 14:59:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:04,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:04,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:04,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:04,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:04,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:04,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:04,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:04,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:04,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:04,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 14:59:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:04,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:04,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:04,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:04,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:04,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:04,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:04,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:04,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:04,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:04,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:04,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:59:04,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139304693] [2020-10-28 14:59:04,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:04,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:59:04,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114168277] [2020-10-28 14:59:04,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:59:04,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:59:04,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:59:04,185 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 12 states. [2020-10-28 14:59:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:06,800 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2020-10-28 14:59:06,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:59:06,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-28 14:59:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:06,802 INFO L225 Difference]: With dead ends: 161 [2020-10-28 14:59:06,802 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 14:59:06,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:59:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 14:59:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2020-10-28 14:59:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 14:59:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-10-28 14:59:06,826 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 59 [2020-10-28 14:59:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:06,829 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-10-28 14:59:06,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:59:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-10-28 14:59:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 14:59:06,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:06,832 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:06,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:59:06,832 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1892594590, now seen corresponding path program 4 times [2020-10-28 14:59:06,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:06,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872867528] [2020-10-28 14:59:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:06,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:07,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:11,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:11,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:59:11,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:12,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:12,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:12,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:12,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:12,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:12,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:12,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:12,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:12,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:59:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:12,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:12,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:12,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:12,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 14:59:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:12,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:12,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:12,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:12,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-28 14:59:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:12,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:12,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:12,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:12,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 81 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:59:12,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872867528] [2020-10-28 14:59:12,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:12,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:59:12,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687667295] [2020-10-28 14:59:12,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:59:12,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:59:12,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:59:12,141 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 13 states. [2020-10-28 14:59:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:12,778 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2020-10-28 14:59:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:59:12,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-10-28 14:59:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:12,780 INFO L225 Difference]: With dead ends: 173 [2020-10-28 14:59:12,781 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 14:59:12,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:59:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 14:59:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2020-10-28 14:59:12,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-28 14:59:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2020-10-28 14:59:12,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 61 [2020-10-28 14:59:12,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:12,794 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2020-10-28 14:59:12,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:59:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2020-10-28 14:59:12,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 14:59:12,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:12,796 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:12,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:59:12,796 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 472636476, now seen corresponding path program 5 times [2020-10-28 14:59:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:12,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062045820] [2020-10-28 14:59:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:12,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:13,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:17,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 14:59:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,495 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-28 14:59:20,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:20,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:20,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:20,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:20,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:20,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:20,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:20,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 14:59:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:20,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:20,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:20,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:20,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 14:59:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:20,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:20,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:20,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 14:59:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:20,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:20,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:20,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:20,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:20,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:59:20,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:20,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:20,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:20,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:20,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:20,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 6 proven. 100 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 14:59:20,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062045820] [2020-10-28 14:59:20,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:20,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:59:20,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004897060] [2020-10-28 14:59:20,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:59:20,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:20,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:59:20,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:59:20,996 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand 16 states. [2020-10-28 14:59:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:24,220 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-10-28 14:59:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:59:24,221 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-28 14:59:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:24,223 INFO L225 Difference]: With dead ends: 105 [2020-10-28 14:59:24,223 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 14:59:24,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:59:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 14:59:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-28 14:59:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 14:59:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-10-28 14:59:24,236 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 63 [2020-10-28 14:59:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:24,236 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-10-28 14:59:24,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:59:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-10-28 14:59:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 14:59:24,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:24,237 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:24,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:59:24,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1902970623, now seen corresponding path program 6 times [2020-10-28 14:59:24,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:24,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75605536] [2020-10-28 14:59:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:24,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:29,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:59:29,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:29,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:29,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:29,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:29,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:29,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:29,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:29,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:29,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:29,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-28 14:59:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:29,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:29,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:29,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:29,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 14:59:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:29,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:29,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:29,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:29,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:29,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:29,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:29,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:29,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:29,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-28 14:59:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:29,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:29,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:29,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:29,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:29,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 14:59:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:29,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:29,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:29,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:29,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:29,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:29,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:29,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 14:59:29,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75605536] [2020-10-28 14:59:29,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:29,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:59:29,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687074348] [2020-10-28 14:59:29,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:59:29,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:59:29,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:59:29,517 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 14 states. [2020-10-28 14:59:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:32,344 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2020-10-28 14:59:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:59:32,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-10-28 14:59:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:32,347 INFO L225 Difference]: With dead ends: 193 [2020-10-28 14:59:32,347 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:59:32,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:59:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:59:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 108. [2020-10-28 14:59:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 14:59:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-10-28 14:59:32,361 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 72 [2020-10-28 14:59:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:32,362 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-10-28 14:59:32,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:59:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-10-28 14:59:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 14:59:32,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:32,364 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:32,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:59:32,364 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1735335517, now seen corresponding path program 7 times [2020-10-28 14:59:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:32,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209451992] [2020-10-28 14:59:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5092 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:59:37,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:37,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:37,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:37,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:37,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:37,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:59:37,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 14:59:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:37,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:37,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:37,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:37,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:37,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:37,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:37,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:59:37,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 14:59:37,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:37,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:37,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:37,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:37,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:37,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:37,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:59:37,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-28 14:59:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:37,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:37,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:37,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:37,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:37,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:37,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:59:37,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-28 14:59:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:37,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:37,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:37,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:37,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:37,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:37,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:37,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:59:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 8 proven. 121 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 14:59:37,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209451992] [2020-10-28 14:59:37,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:37,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:59:37,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610689003] [2020-10-28 14:59:37,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:59:37,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:59:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:59:37,873 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 15 states. [2020-10-28 14:59:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:38,827 INFO L93 Difference]: Finished difference Result 205 states and 227 transitions. [2020-10-28 14:59:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:59:38,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 74 [2020-10-28 14:59:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:38,829 INFO L225 Difference]: With dead ends: 205 [2020-10-28 14:59:38,829 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 14:59:38,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:59:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 14:59:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2020-10-28 14:59:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-28 14:59:38,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-28 14:59:38,857 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 74 [2020-10-28 14:59:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:38,857 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-28 14:59:38,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:59:38,857 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-28 14:59:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 14:59:38,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:38,861 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:38,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:59:38,861 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:38,862 INFO L82 PathProgramCache]: Analyzing trace with hash 448211397, now seen corresponding path program 8 times [2020-10-28 14:59:38,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:38,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780602829] [2020-10-28 14:59:38,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:39,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:43,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:59:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:44,870 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2020-10-28 14:59:45,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:45,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:45,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:45,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:45,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:45,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:45,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:45,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:59:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:45,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:45,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:45,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 14:59:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:45,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:45,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 14:59:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:45,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 14:59:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:45,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:45,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:45,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:45,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:59:45,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:45,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:59:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:45,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:59:45,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-28 14:59:45,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780602829] [2020-10-28 14:59:45,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:45,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:59:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931820863] [2020-10-28 14:59:45,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:59:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:45,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:59:45,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:59:45,098 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 17 states. [2020-10-28 14:59:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:45,877 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2020-10-28 14:59:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:59:45,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-28 14:59:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:45,879 INFO L225 Difference]: With dead ends: 123 [2020-10-28 14:59:45,879 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:59:45,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:59:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:59:45,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-28 14:59:45,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-28 14:59:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-28 14:59:45,897 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 76 [2020-10-28 14:59:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:45,897 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-28 14:59:45,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:59:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-28 14:59:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 14:59:45,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:45,898 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:45,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:59:45,898 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:45,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1791969756, now seen corresponding path program 9 times [2020-10-28 14:59:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:45,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146423539] [2020-10-28 14:59:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:45,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:46,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 14:59:51,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:51,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-28 14:59:51,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:59:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:51,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:59:51,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:59:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:51,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:59:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:51,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:51,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:51,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:51,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:51,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 14:59:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:51,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-28 14:59:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:51,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:51,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-10-28 14:59:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:51,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:51,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:51,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:51,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:51,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:51,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-28 14:59:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:51,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:51,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:51,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 14:59:51,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:59:51,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:59:51,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:51,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:59:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 14:59:51,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:59:51,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:59:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 10 proven. 144 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-28 14:59:51,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146423539] [2020-10-28 14:59:51,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:59:51,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:59:51,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883039877] [2020-10-28 14:59:51,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:59:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:59:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:59:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:59:51,357 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 16 states. [2020-10-28 14:59:54,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:59:54,510 INFO L93 Difference]: Finished difference Result 225 states and 247 transitions. [2020-10-28 14:59:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:59:54,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 85 [2020-10-28 14:59:54,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:59:54,512 INFO L225 Difference]: With dead ends: 225 [2020-10-28 14:59:54,512 INFO L226 Difference]: Without dead ends: 137 [2020-10-28 14:59:54,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:59:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-28 14:59:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 126. [2020-10-28 14:59:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:59:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-10-28 14:59:54,530 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 85 [2020-10-28 14:59:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:59:54,532 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-10-28 14:59:54,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:59:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-10-28 14:59:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-28 14:59:54,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:59:54,533 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:59:54,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:59:54,533 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:59:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:59:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash 822343802, now seen corresponding path program 10 times [2020-10-28 14:59:54,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:59:54,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813753764] [2020-10-28 14:59:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:59:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:59:54,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:55,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:59:59,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-28 14:59:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,037 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 28 [2020-10-28 15:00:01,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:01,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:01,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:01,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:01,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 15:00:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:01,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:01,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:01,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:01,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:01,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:00:01,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:01,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:01,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:01,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 15:00:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:01,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:01,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:01,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:01,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:01,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:00:01,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:01,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:01,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 15:00:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:01,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:01,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:01,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:01,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:01,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:00:01,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:01,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:01,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:01,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 15:00:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:01,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:01,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:01,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:01,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:00:01,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:01,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:01,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:01,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 15:00:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:01,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:01,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:01,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:01,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:01,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 10 proven. 193 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 15:00:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813753764] [2020-10-28 15:00:01,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:01,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:00:01,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662666210] [2020-10-28 15:00:01,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:00:01,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:00:01,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:00:01,347 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 20 states. [2020-10-28 15:00:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:02,593 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-28 15:00:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:00:02,593 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-10-28 15:00:02,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:02,598 INFO L225 Difference]: With dead ends: 134 [2020-10-28 15:00:02,598 INFO L226 Difference]: Without dead ends: 130 [2020-10-28 15:00:02,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:00:02,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-28 15:00:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-28 15:00:02,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-28 15:00:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2020-10-28 15:00:02,619 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 87 [2020-10-28 15:00:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:02,619 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2020-10-28 15:00:02,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:00:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2020-10-28 15:00:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-28 15:00:02,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:02,620 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:02,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:00:02,621 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1629240701, now seen corresponding path program 11 times [2020-10-28 15:00:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:02,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136888915] [2020-10-28 15:00:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:02,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:03,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-28 15:00:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:00:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 15:00:07,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:07,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:00:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 15:00:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:07,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:07,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:07,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:07,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:07,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:07,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:07,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:07,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:07,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:07,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:07,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:07,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-28 15:00:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:07,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:08,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:08,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:08,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:08,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:08,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:08,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-28 15:00:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:08,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:08,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:08,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:08,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:08,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 15:00:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:08,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:08,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:08,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 15:00:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:08,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:08,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:08,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:08,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-28 15:00:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:08,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:08,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:08,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-10-28 15:00:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:08,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:08,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:08,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:08,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 12 proven. 169 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 15:00:08,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136888915] [2020-10-28 15:00:08,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:08,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:00:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015234072] [2020-10-28 15:00:08,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:00:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:00:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:00:08,043 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 17 states. [2020-10-28 15:00:09,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:09,219 INFO L93 Difference]: Finished difference Result 245 states and 267 transitions. [2020-10-28 15:00:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:00:09,221 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-10-28 15:00:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:09,222 INFO L225 Difference]: With dead ends: 245 [2020-10-28 15:00:09,223 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 15:00:09,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:00:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 15:00:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2020-10-28 15:00:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 15:00:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2020-10-28 15:00:09,251 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 96 [2020-10-28 15:00:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:09,251 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2020-10-28 15:00:09,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:00:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2020-10-28 15:00:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-28 15:00:09,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:09,255 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:09,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:00:09,255 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:09,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:09,256 INFO L82 PathProgramCache]: Analyzing trace with hash 775578917, now seen corresponding path program 12 times [2020-10-28 15:00:09,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:09,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868846631] [2020-10-28 15:00:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:09,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:11,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-28 15:00:14,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:00:14,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 15:00:14,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:00:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:14,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 15:00:14,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:14,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:00:14,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:14,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-28 15:00:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:14,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:14,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 15:00:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:14,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-28 15:00:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:14,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 15:00:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:00:14,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:00:14,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-28 15:00:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:14,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:14,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:14,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:14,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-28 15:00:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:14,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:14,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:14,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:14,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:14,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:00:14,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:14,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:14,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:00:14,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:14,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:00:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 12 proven. 196 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 15:00:14,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868846631] [2020-10-28 15:00:14,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:14,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:00:14,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907873239] [2020-10-28 15:00:14,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:00:14,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:14,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:00:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:00:14,718 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand 18 states. [2020-10-28 15:00:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:00:16,025 INFO L93 Difference]: Finished difference Result 257 states and 281 transitions. [2020-10-28 15:00:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:00:16,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 98 [2020-10-28 15:00:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:00:16,031 INFO L225 Difference]: With dead ends: 257 [2020-10-28 15:00:16,031 INFO L226 Difference]: Without dead ends: 155 [2020-10-28 15:00:16,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:00:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-28 15:00:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2020-10-28 15:00:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 15:00:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2020-10-28 15:00:16,047 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 98 [2020-10-28 15:00:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:00:16,047 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2020-10-28 15:00:16,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:00:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2020-10-28 15:00:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 15:00:16,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:00:16,049 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:00:16,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:00:16,049 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:00:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:00:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1114826567, now seen corresponding path program 13 times [2020-10-28 15:00:16,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:00:16,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139681001] [2020-10-28 15:00:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:00:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:16,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:17,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:21,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:21,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-28 15:00:21,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:00:21,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 15:00:21,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:21,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:21,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:00:21,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:00:21,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 15:00:21,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:32,370 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-28 15:00:34,727 WARN L193 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-28 15:00:43,167 WARN L193 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-28 15:00:43,401 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2020-10-28 15:00:43,622 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-28 15:00:46,138 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-28 15:00:52,657 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 80 DAG size of output: 29 [2020-10-28 15:00:57,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:00:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:00:57,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:00:57,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 15:00:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:57,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:00:57,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:57,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 15:00:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:57,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 15:00:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:57,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 15:00:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:57,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:57,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-28 15:00:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:57,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 15:00:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:00:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:00:57,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:00:57,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:00:57,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:00:57,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:00:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 12 proven. 225 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-28 15:00:57,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139681001] [2020-10-28 15:00:57,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:00:57,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:00:57,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591119082] [2020-10-28 15:00:57,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:00:57,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:00:57,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:00:57,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=364, Unknown=5, NotChecked=0, Total=420 [2020-10-28 15:00:57,177 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand 21 states. [2020-10-28 15:00:59,509 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-10-28 15:01:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:17,990 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2020-10-28 15:01:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:01:17,991 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-28 15:01:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:17,992 INFO L225 Difference]: With dead ends: 152 [2020-10-28 15:01:17,992 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 15:01:17,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=138, Invalid=1045, Unknown=7, NotChecked=0, Total=1190 [2020-10-28 15:01:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 15:01:18,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-28 15:01:18,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-28 15:01:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 157 transitions. [2020-10-28 15:01:18,011 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 157 transitions. Word has length 100 [2020-10-28 15:01:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:18,011 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 157 transitions. [2020-10-28 15:01:18,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:01:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 157 transitions. [2020-10-28 15:01:18,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 15:01:18,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:18,013 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:18,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:01:18,013 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash 188980890, now seen corresponding path program 14 times [2020-10-28 15:01:18,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:18,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094048560] [2020-10-28 15:01:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:18,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5370 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 15:01:23,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:23,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-28 15:01:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 15:01:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-28 15:01:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 15:01:23,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 15:01:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-28 15:01:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-10-28 15:01:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-28 15:01:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:23,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:23,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:23,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:23,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 14 proven. 225 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-28 15:01:23,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094048560] [2020-10-28 15:01:23,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:23,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:01:23,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319528100] [2020-10-28 15:01:23,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:01:23,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:23,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:01:23,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:01:23,852 INFO L87 Difference]: Start difference. First operand 148 states and 157 transitions. Second operand 19 states. [2020-10-28 15:01:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:27,438 INFO L93 Difference]: Finished difference Result 277 states and 301 transitions. [2020-10-28 15:01:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:01:27,439 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 109 [2020-10-28 15:01:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:27,441 INFO L225 Difference]: With dead ends: 277 [2020-10-28 15:01:27,441 INFO L226 Difference]: Without dead ends: 166 [2020-10-28 15:01:27,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:01:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-28 15:01:27,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-10-28 15:01:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-28 15:01:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2020-10-28 15:01:27,471 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 109 [2020-10-28 15:01:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:27,473 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2020-10-28 15:01:27,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:01:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2020-10-28 15:01:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-28 15:01:27,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:27,477 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:27,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:01:27,479 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:27,479 INFO L82 PathProgramCache]: Analyzing trace with hash -543304904, now seen corresponding path program 15 times [2020-10-28 15:01:27,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:27,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835220282] [2020-10-28 15:01:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:27,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:29,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:32,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:32,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5206 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 15:01:32,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:01:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:01:33,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:01:33,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,154 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:01:33,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-28 15:01:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 15:01:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:33,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-28 15:01:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:01:33,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 15:01:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-28 15:01:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-28 15:01:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:33,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-10-28 15:01:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:33,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:33,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-28 15:01:33,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:01:33,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:01:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 14 proven. 256 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-28 15:01:33,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835220282] [2020-10-28 15:01:33,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:01:33,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:01:33,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687884692] [2020-10-28 15:01:33,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:01:33,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:01:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:01:33,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:01:33,217 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand 20 states. [2020-10-28 15:01:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:01:34,785 INFO L93 Difference]: Finished difference Result 289 states and 315 transitions. [2020-10-28 15:01:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:01:34,786 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-10-28 15:01:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:01:34,788 INFO L225 Difference]: With dead ends: 289 [2020-10-28 15:01:34,788 INFO L226 Difference]: Without dead ends: 173 [2020-10-28 15:01:34,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:01:34,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-28 15:01:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 162. [2020-10-28 15:01:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 15:01:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 173 transitions. [2020-10-28 15:01:34,807 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 173 transitions. Word has length 111 [2020-10-28 15:01:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:01:34,808 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 173 transitions. [2020-10-28 15:01:34,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:01:34,808 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 173 transitions. [2020-10-28 15:01:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 15:01:34,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:01:34,809 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:01:34,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:01:34,809 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:01:34,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:01:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash 104683606, now seen corresponding path program 16 times [2020-10-28 15:01:34,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:01:34,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544382501] [2020-10-28 15:01:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:01:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:01:34,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:01:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking...