/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/array-examples/standard_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:06:28,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:06:28,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:06:28,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:06:28,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:06:28,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:06:28,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:06:28,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:06:28,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:06:28,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:06:28,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:06:28,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:06:28,626 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:06:28,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:06:28,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:06:28,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:06:28,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:06:28,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:06:28,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:06:28,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:06:28,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:06:28,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:06:28,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:06:28,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:06:28,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:06:28,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:06:28,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:06:28,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:06:28,656 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:06:28,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:06:28,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:06:28,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:06:28,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:06:28,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:06:28,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:06:28,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:06:28,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:06:28,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:06:28,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:06:28,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:06:28,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:06:28,707 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 09:06:28,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:06:28,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:06:28,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:06:28,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:06:28,762 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:06:28,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:06:28,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:06:28,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:06:28,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:06:28,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:06:28,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:06:28,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:06:28,764 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:06:28,764 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:06:28,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:06:28,765 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:06:28,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:06:28,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:06:28,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:06:28,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:06:28,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:06:28,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:06:28,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:06:28,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:06:28,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:06:28,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:06:28,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:06:28,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:06:28,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:06:28,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:06:29,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:06:29,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:06:29,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:06:29,224 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:06:29,225 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:06:29,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-28 09:06:29,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ee8fe0b9/2122a818d9e343f3adaf24cc9cc072d3/FLAG2f98d9705 [2020-10-28 09:06:29,881 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:06:29,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_running-1.i [2020-10-28 09:06:29,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ee8fe0b9/2122a818d9e343f3adaf24cc9cc072d3/FLAG2f98d9705 [2020-10-28 09:06:30,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ee8fe0b9/2122a818d9e343f3adaf24cc9cc072d3 [2020-10-28 09:06:30,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:06:30,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:06:30,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:30,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:06:30,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:06:30,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a62b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30, skipping insertion in model container [2020-10-28 09:06:30,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:06:30,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:06:30,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:30,456 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:06:30,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:06:30,501 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:06:30,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30 WrapperNode [2020-10-28 09:06:30,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:06:30,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:06:30,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:06:30,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:06:30,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (1/1) ... [2020-10-28 09:06:30,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:06:30,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:06:30,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:06:30,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:06:30,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (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 09:06:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:06:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:06:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:06:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:06:30,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:06:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:06:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:06:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:06:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:06:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:06:30,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:06:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:06:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:06:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:06:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:06:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:06:30,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:06:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:06:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:06:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:06:30,977 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:06:30,978 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:06:30,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:30 BoogieIcfgContainer [2020-10-28 09:06:30,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:06:30,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:06:30,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:06:30,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:06:30,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:06:30" (1/3) ... [2020-10-28 09:06:30,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263dda1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:30, skipping insertion in model container [2020-10-28 09:06:30,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:06:30" (2/3) ... [2020-10-28 09:06:30,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@263dda1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:06:30, skipping insertion in model container [2020-10-28 09:06:30,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:06:30" (3/3) ... [2020-10-28 09:06:30,990 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2020-10-28 09:06:31,005 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:06:31,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:06:31,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:06:31,060 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:06:31,060 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:06:31,060 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:06:31,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:06:31,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:06:31,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:06:31,061 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:06:31,061 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:06:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-28 09:06:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:06:31,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:31,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:31,103 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1112199025, now seen corresponding path program 1 times [2020-10-28 09:06:31,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:31,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229992441] [2020-10-28 09:06:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:31,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:31,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:06:31,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:31,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-28 09:06:31,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:31,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:31,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:31,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:06:31,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:31,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:06:31,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:31,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:32,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 09:06:32,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:32,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:32,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:32,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:06:32,036 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 09:06:32,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229992441] [2020-10-28 09:06:32,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:32,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:06:32,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926867613] [2020-10-28 09:06:32,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:06:32,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:32,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:06:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:06:32,082 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-28 09:06:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:32,199 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-28 09:06:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:06:32,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-28 09:06:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:32,210 INFO L225 Difference]: With dead ends: 63 [2020-10-28 09:06:32,210 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 09:06:32,214 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 09:06:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 09:06:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 09:06:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 09:06:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-28 09:06:32,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 17 [2020-10-28 09:06:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:32,258 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-28 09:06:32,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:06:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-28 09:06:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 09:06:32,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:32,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:32,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:06:32,260 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1368569504, now seen corresponding path program 1 times [2020-10-28 09:06:32,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:32,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583336931] [2020-10-28 09:06:32,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 09:06:32,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:32,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-28 09:06:32,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:06:32,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:06:32,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:06:32,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:32,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:32,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:32,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:32,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:32,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:06:32,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:32,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:32,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:32,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:32,944 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 09:06:32,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583336931] [2020-10-28 09:06:32,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:06:32,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:06:32,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828290175] [2020-10-28 09:06:32,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:06:32,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:32,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:06:32,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:06:32,948 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 4 states. [2020-10-28 09:06:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:33,091 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2020-10-28 09:06:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:06:33,092 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-28 09:06:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:33,093 INFO L225 Difference]: With dead ends: 58 [2020-10-28 09:06:33,094 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:06:33,095 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 09:06:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:06:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-28 09:06:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:06:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-28 09:06:33,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-10-28 09:06:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:33,105 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-28 09:06:33,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:06:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-28 09:06:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:06:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:33,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:33,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:06:33,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1252613861, now seen corresponding path program 1 times [2020-10-28 09:06:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:33,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201104863] [2020-10-28 09:06:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:33,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:33,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 09:06:38,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:06:38,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:06:38,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:06:38,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:06:38,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:06:38,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:38,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:38,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:38,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:38,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:06:38,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:38,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:38,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:38,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:06:38,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201104863] [2020-10-28 09:06:38,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:38,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:06:38,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753006235] [2020-10-28 09:06:38,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:06:38,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:06:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:06:38,211 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-10-28 09:06:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:38,388 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2020-10-28 09:06:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:06:38,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-28 09:06:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:38,390 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:06:38,391 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 09:06:38,394 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 09:06:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 09:06:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-28 09:06:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:06:38,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-10-28 09:06:38,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 29 [2020-10-28 09:06:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:38,414 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-10-28 09:06:38,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:06:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-10-28 09:06:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:06:38,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:38,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:38,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:06:38,416 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:38,418 INFO L82 PathProgramCache]: Analyzing trace with hash 424207484, now seen corresponding path program 2 times [2020-10-28 09:06:38,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:38,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850949146] [2020-10-28 09:06:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:38,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:38,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:43,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:06:43,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:06:43,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:06:43,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:43,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:43,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:06:43,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:06:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:06:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:06:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:43,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:43,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:43,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:43,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:06:43,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:43,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:43,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:06:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850949146] [2020-10-28 09:06:43,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:43,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:06:43,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839603304] [2020-10-28 09:06:43,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:06:43,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:43,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:06:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:43,593 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 7 states. [2020-10-28 09:06:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:43,880 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2020-10-28 09:06:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:06:43,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-28 09:06:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:43,883 INFO L225 Difference]: With dead ends: 84 [2020-10-28 09:06:43,883 INFO L226 Difference]: Without dead ends: 68 [2020-10-28 09:06:43,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:06:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-28 09:06:43,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-28 09:06:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 09:06:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2020-10-28 09:06:43,895 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 41 [2020-10-28 09:06:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:43,896 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2020-10-28 09:06:43,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:06:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2020-10-28 09:06:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:06:43,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:43,903 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:43,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:06:43,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:43,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -596860870, now seen corresponding path program 1 times [2020-10-28 09:06:43,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:43,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154734771] [2020-10-28 09:06:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:43,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:43,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:44,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:46,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:47,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:47,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:47,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:47,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:47,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:48,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:06:48,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:06:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:06:48,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:48,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:06:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:06:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:06:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:48,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:48,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:48,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:48,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:48,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:48,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:48,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:49,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:49,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:49,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:06:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:06:49,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154734771] [2020-10-28 09:06:49,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:49,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:06:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323536541] [2020-10-28 09:06:49,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:06:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:06:49,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:49,012 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand 6 states. [2020-10-28 09:06:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:49,179 INFO L93 Difference]: Finished difference Result 127 states and 176 transitions. [2020-10-28 09:06:49,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:06:49,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-28 09:06:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:49,181 INFO L225 Difference]: With dead ends: 127 [2020-10-28 09:06:49,181 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 09:06:49,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:06:49,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 09:06:49,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2020-10-28 09:06:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 09:06:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2020-10-28 09:06:49,192 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 41 [2020-10-28 09:06:49,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:49,194 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2020-10-28 09:06:49,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:06:49,194 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2020-10-28 09:06:49,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:06:49,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:49,196 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:49,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:06:49,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2137367289, now seen corresponding path program 2 times [2020-10-28 09:06:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:49,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873510773] [2020-10-28 09:06:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:49,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:49,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:54,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:06:54,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:06:54,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:06:54,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:54,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:54,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:06:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 09:06:54,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:06:54,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:54,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:54,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:54,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:54,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:54,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:54,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:54,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:54,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-28 09:06:54,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873510773] [2020-10-28 09:06:54,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:54,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:06:54,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171693873] [2020-10-28 09:06:54,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:06:54,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:54,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:06:54,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:54,312 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand 7 states. [2020-10-28 09:06:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:54,470 INFO L93 Difference]: Finished difference Result 157 states and 218 transitions. [2020-10-28 09:06:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:06:54,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-28 09:06:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:54,471 INFO L225 Difference]: With dead ends: 157 [2020-10-28 09:06:54,472 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:06:54,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:06:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:06:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-10-28 09:06:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 09:06:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2020-10-28 09:06:54,483 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 53 [2020-10-28 09:06:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:54,483 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2020-10-28 09:06:54,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:06:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2020-10-28 09:06:54,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:06:54,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:54,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:54,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:06:54,488 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2039036714, now seen corresponding path program 3 times [2020-10-28 09:06:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:54,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705063395] [2020-10-28 09:06:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:54,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:54,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:56,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:56,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:59,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-28 09:06:59,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:06:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:59,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:59,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:59,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:59,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:59,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:06:59,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:59,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:59,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:59,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:59,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:59,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-28 09:06:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705063395] [2020-10-28 09:06:59,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:59,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:06:59,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928681500] [2020-10-28 09:06:59,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:06:59,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:59,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:06:59,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:59,616 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand 8 states. [2020-10-28 09:06:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:59,787 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2020-10-28 09:06:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:06:59,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-28 09:06:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:59,788 INFO L225 Difference]: With dead ends: 187 [2020-10-28 09:06:59,789 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 09:06:59,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:06:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 09:06:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2020-10-28 09:06:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 09:06:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 138 transitions. [2020-10-28 09:06:59,800 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 138 transitions. Word has length 65 [2020-10-28 09:06:59,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:59,800 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 138 transitions. [2020-10-28 09:06:59,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:06:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 138 transitions. [2020-10-28 09:06:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:06:59,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:59,802 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:06:59,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:06:59,803 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash -696245035, now seen corresponding path program 4 times [2020-10-28 09:06:59,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:59,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747333027] [2020-10-28 09:06:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:59,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:59,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:00,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:03,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:04,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:07:04,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:07:04,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:07:04,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:04,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:07:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 09:07:04,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:07:04,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:04,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:04,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:04,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:04,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:04,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:04,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:04,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-10-28 09:07:04,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747333027] [2020-10-28 09:07:04,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:07:04,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 09:07:04,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082788703] [2020-10-28 09:07:04,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:07:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:04,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:07:04,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:07:04,933 INFO L87 Difference]: Start difference. First operand 103 states and 138 transitions. Second operand 6 states. [2020-10-28 09:07:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:05,026 INFO L93 Difference]: Finished difference Result 175 states and 239 transitions. [2020-10-28 09:07:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:07:05,026 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 77 [2020-10-28 09:07:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:05,029 INFO L225 Difference]: With dead ends: 175 [2020-10-28 09:07:05,029 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:07:05,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:07:05,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2020-10-28 09:07:05,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 09:07:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 158 transitions. [2020-10-28 09:07:05,040 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 158 transitions. Word has length 77 [2020-10-28 09:07:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:05,041 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 158 transitions. [2020-10-28 09:07:05,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:07:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 158 transitions. [2020-10-28 09:07:05,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:07:05,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:05,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:05,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:07:05,043 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash -968241645, now seen corresponding path program 1 times [2020-10-28 09:07:05,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:05,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301385190] [2020-10-28 09:07:05,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:05,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:05,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:05,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:07,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:07,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:07,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:08,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:08,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:09,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:10,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:07:10,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:07:10,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:07:10,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:10,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:10,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:07:10,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 09:07:10,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:07:10,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:10,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:10,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:10,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:10,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:10,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:10,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:10,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:10,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:10,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:10,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-28 09:07:10,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301385190] [2020-10-28 09:07:10,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:10,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:07:10,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856912262] [2020-10-28 09:07:10,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:07:10,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:07:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:10,205 INFO L87 Difference]: Start difference. First operand 118 states and 158 transitions. Second operand 9 states. [2020-10-28 09:07:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:10,460 INFO L93 Difference]: Finished difference Result 253 states and 350 transitions. [2020-10-28 09:07:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:07:10,460 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-28 09:07:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:10,461 INFO L225 Difference]: With dead ends: 253 [2020-10-28 09:07:10,462 INFO L226 Difference]: Without dead ends: 152 [2020-10-28 09:07:10,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-28 09:07:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2020-10-28 09:07:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 09:07:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2020-10-28 09:07:10,489 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 77 [2020-10-28 09:07:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:10,489 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2020-10-28 09:07:10,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:07:10,490 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2020-10-28 09:07:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:07:10,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:10,495 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:10,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:07:10,495 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash -282489676, now seen corresponding path program 2 times [2020-10-28 09:07:10,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:10,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675034787] [2020-10-28 09:07:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:10,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:10,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:13,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:15,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:07:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:07:15,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:07:15,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:15,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:15,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:15,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:15,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:15,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:15,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 62 proven. 49 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-28 09:07:15,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675034787] [2020-10-28 09:07:15,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:15,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:07:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322306720] [2020-10-28 09:07:15,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:07:15,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:07:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:15,750 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand 11 states. [2020-10-28 09:07:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:16,472 INFO L93 Difference]: Finished difference Result 288 states and 395 transitions. [2020-10-28 09:07:16,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:07:16,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 89 [2020-10-28 09:07:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:16,479 INFO L225 Difference]: With dead ends: 288 [2020-10-28 09:07:16,479 INFO L226 Difference]: Without dead ends: 221 [2020-10-28 09:07:16,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:07:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-28 09:07:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 174. [2020-10-28 09:07:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:07:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 227 transitions. [2020-10-28 09:07:16,490 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 227 transitions. Word has length 89 [2020-10-28 09:07:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:16,490 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 227 transitions. [2020-10-28 09:07:16,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:07:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 227 transitions. [2020-10-28 09:07:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:07:16,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:16,492 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:16,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:07:16,492 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -354876234, now seen corresponding path program 1 times [2020-10-28 09:07:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:16,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019060234] [2020-10-28 09:07:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:16,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:17,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:21,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:07:21,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:21,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:21,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:21,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:21,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:21,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:21,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:21,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:21,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:21,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:21,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:21,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:21,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-10-28 09:07:21,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019060234] [2020-10-28 09:07:21,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:21,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:07:21,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782902683] [2020-10-28 09:07:21,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:07:21,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:07:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:07:21,694 INFO L87 Difference]: Start difference. First operand 174 states and 227 transitions. Second operand 9 states. [2020-10-28 09:07:22,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:22,262 INFO L93 Difference]: Finished difference Result 316 states and 413 transitions. [2020-10-28 09:07:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:07:22,263 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-28 09:07:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:22,266 INFO L225 Difference]: With dead ends: 316 [2020-10-28 09:07:22,266 INFO L226 Difference]: Without dead ends: 260 [2020-10-28 09:07:22,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:07:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-28 09:07:22,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 203. [2020-10-28 09:07:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-28 09:07:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 266 transitions. [2020-10-28 09:07:22,284 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 266 transitions. Word has length 89 [2020-10-28 09:07:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:22,286 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-10-28 09:07:22,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:07:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 266 transitions. [2020-10-28 09:07:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:07:22,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:22,289 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:22,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:07:22,290 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:22,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1726683532, now seen corresponding path program 2 times [2020-10-28 09:07:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:22,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027127660] [2020-10-28 09:07:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:22,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:07:27,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:07:27,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:07:27,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:27,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:27,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:27,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:27,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:27,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:27,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-28 09:07:27,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027127660] [2020-10-28 09:07:27,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:27,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:07:27,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541288112] [2020-10-28 09:07:27,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:07:27,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:07:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:07:27,440 INFO L87 Difference]: Start difference. First operand 203 states and 266 transitions. Second operand 7 states. [2020-10-28 09:07:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:27,712 INFO L93 Difference]: Finished difference Result 335 states and 436 transitions. [2020-10-28 09:07:27,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:07:27,713 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-28 09:07:27,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:27,716 INFO L225 Difference]: With dead ends: 335 [2020-10-28 09:07:27,716 INFO L226 Difference]: Without dead ends: 268 [2020-10-28 09:07:27,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-28 09:07:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 204. [2020-10-28 09:07:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 09:07:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 267 transitions. [2020-10-28 09:07:27,727 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 267 transitions. Word has length 89 [2020-10-28 09:07:27,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:27,728 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 267 transitions. [2020-10-28 09:07:27,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:07:27,729 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 267 transitions. [2020-10-28 09:07:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:07:27,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:27,731 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:27,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:07:27,732 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:27,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2079771914, now seen corresponding path program 3 times [2020-10-28 09:07:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:27,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413907285] [2020-10-28 09:07:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:27,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:27,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:27,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:27,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:30,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:31,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:32,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:32,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:07:32,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:07:32,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 09:07:32,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:32,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:07:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:07:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 09:07:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:33,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:33,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:33,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-10-28 09:07:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413907285] [2020-10-28 09:07:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:07:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754145987] [2020-10-28 09:07:33,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:07:33,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:07:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:07:33,090 INFO L87 Difference]: Start difference. First operand 204 states and 267 transitions. Second operand 12 states. [2020-10-28 09:07:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:33,510 INFO L93 Difference]: Finished difference Result 316 states and 405 transitions. [2020-10-28 09:07:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:07:33,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-28 09:07:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:33,515 INFO L225 Difference]: With dead ends: 316 [2020-10-28 09:07:33,515 INFO L226 Difference]: Without dead ends: 309 [2020-10-28 09:07:33,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:07:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-28 09:07:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 274. [2020-10-28 09:07:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-28 09:07:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 363 transitions. [2020-10-28 09:07:33,554 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 363 transitions. Word has length 89 [2020-10-28 09:07:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:33,555 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 363 transitions. [2020-10-28 09:07:33,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:07:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 363 transitions. [2020-10-28 09:07:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 09:07:33,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:33,556 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:33,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:07:33,557 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1821606476, now seen corresponding path program 4 times [2020-10-28 09:07:33,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:33,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148386928] [2020-10-28 09:07:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:33,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:33,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:37,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:38,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:38,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 09:07:38,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:07:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:07:38,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:38,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:07:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:07:38,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:07:38,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:38,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:38,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:38,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:38,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:38,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:38,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-10-28 09:07:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148386928] [2020-10-28 09:07:38,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:38,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:07:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803168710] [2020-10-28 09:07:38,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:07:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:38,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:07:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:38,714 INFO L87 Difference]: Start difference. First operand 274 states and 363 transitions. Second operand 10 states. [2020-10-28 09:07:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:39,026 INFO L93 Difference]: Finished difference Result 611 states and 820 transitions. [2020-10-28 09:07:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:07:39,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2020-10-28 09:07:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:39,029 INFO L225 Difference]: With dead ends: 611 [2020-10-28 09:07:39,030 INFO L226 Difference]: Without dead ends: 356 [2020-10-28 09:07:39,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:07:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-28 09:07:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 310. [2020-10-28 09:07:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-28 09:07:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 411 transitions. [2020-10-28 09:07:39,047 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 411 transitions. Word has length 89 [2020-10-28 09:07:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:39,047 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 411 transitions. [2020-10-28 09:07:39,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:07:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 411 transitions. [2020-10-28 09:07:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:07:39,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:39,049 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:39,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:07:39,050 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:39,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -196782165, now seen corresponding path program 5 times [2020-10-28 09:07:39,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:39,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045108459] [2020-10-28 09:07:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:39,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:39,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:40,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:44,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:44,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 09:07:44,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:07:44,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 09:07:44,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:44,097 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:07:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:07:44,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 09:07:44,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:44,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:44,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:44,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:44,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:44,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:44,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:44,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:44,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:44,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:44,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 09:07:44,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045108459] [2020-10-28 09:07:44,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:44,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:07:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043946799] [2020-10-28 09:07:44,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:07:44,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:07:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:07:44,340 INFO L87 Difference]: Start difference. First operand 310 states and 411 transitions. Second operand 13 states. [2020-10-28 09:07:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:45,534 INFO L93 Difference]: Finished difference Result 448 states and 594 transitions. [2020-10-28 09:07:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:07:45,534 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 101 [2020-10-28 09:07:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:45,537 INFO L225 Difference]: With dead ends: 448 [2020-10-28 09:07:45,537 INFO L226 Difference]: Without dead ends: 403 [2020-10-28 09:07:45,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:07:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-28 09:07:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2020-10-28 09:07:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-28 09:07:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 476 transitions. [2020-10-28 09:07:45,560 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 476 transitions. Word has length 101 [2020-10-28 09:07:45,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:45,560 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 476 transitions. [2020-10-28 09:07:45,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:07:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 476 transitions. [2020-10-28 09:07:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-28 09:07:45,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:45,562 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:45,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:07:45,563 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:45,563 INFO L82 PathProgramCache]: Analyzing trace with hash -269168723, now seen corresponding path program 6 times [2020-10-28 09:07:45,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:45,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127012215] [2020-10-28 09:07:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:45,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:45,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:50,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:07:50,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:50,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:50,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:50,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:50,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:50,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:50,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:50,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:50,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:50,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:50,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-10-28 09:07:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127012215] [2020-10-28 09:07:50,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:50,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:07:50,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682653055] [2020-10-28 09:07:50,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:07:50,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:07:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:50,736 INFO L87 Difference]: Start difference. First operand 358 states and 476 transitions. Second operand 11 states. [2020-10-28 09:07:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:51,046 INFO L93 Difference]: Finished difference Result 782 states and 1052 transitions. [2020-10-28 09:07:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:07:51,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-28 09:07:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:51,052 INFO L225 Difference]: With dead ends: 782 [2020-10-28 09:07:51,052 INFO L226 Difference]: Without dead ends: 445 [2020-10-28 09:07:51,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:07:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-28 09:07:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 397. [2020-10-28 09:07:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-28 09:07:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 528 transitions. [2020-10-28 09:07:51,078 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 528 transitions. Word has length 101 [2020-10-28 09:07:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:51,078 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 528 transitions. [2020-10-28 09:07:51,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:07:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 528 transitions. [2020-10-28 09:07:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:07:51,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:51,080 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:51,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:07:51,080 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1188290830, now seen corresponding path program 7 times [2020-10-28 09:07:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:51,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220873025] [2020-10-28 09:07:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:51,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:51,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:56,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:56,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 09:07:56,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:07:56,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:07:56,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:56,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:56,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:07:56,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:07:56,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 09:07:56,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:56,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:07:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:56,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:07:56,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:07:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:07:56,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:07:56,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:07:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 114 proven. 131 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-10-28 09:07:56,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220873025] [2020-10-28 09:07:56,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:07:56,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:07:56,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493833083] [2020-10-28 09:07:56,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:07:56,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:07:56,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:07:56,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:07:56,435 INFO L87 Difference]: Start difference. First operand 397 states and 528 transitions. Second operand 15 states. [2020-10-28 09:07:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:07:57,989 INFO L93 Difference]: Finished difference Result 546 states and 726 transitions. [2020-10-28 09:07:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:07:57,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-10-28 09:07:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:07:57,992 INFO L225 Difference]: With dead ends: 546 [2020-10-28 09:07:57,993 INFO L226 Difference]: Without dead ends: 501 [2020-10-28 09:07:57,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:07:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-10-28 09:07:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 456. [2020-10-28 09:07:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-28 09:07:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 608 transitions. [2020-10-28 09:07:58,026 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 608 transitions. Word has length 113 [2020-10-28 09:07:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:07:58,026 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 608 transitions. [2020-10-28 09:07:58,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:07:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 608 transitions. [2020-10-28 09:07:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-28 09:07:58,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:07:58,030 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:07:58,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:07:58,030 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:07:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:07:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1115904272, now seen corresponding path program 8 times [2020-10-28 09:07:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:07:58,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884113306] [2020-10-28 09:07:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:07:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:07:58,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:07:58,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:01,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:03,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-28 09:08:03,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:08:03,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:08:03,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:03,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:08:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:08:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:08:03,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:03,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:03,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:03,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:03,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:03,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:03,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:03,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:03,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-28 09:08:03,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884113306] [2020-10-28 09:08:03,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:03,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:08:03,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118367592] [2020-10-28 09:08:03,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:08:03,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:08:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:08:03,222 INFO L87 Difference]: Start difference. First operand 456 states and 608 transitions. Second operand 12 states. [2020-10-28 09:08:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:03,576 INFO L93 Difference]: Finished difference Result 981 states and 1322 transitions. [2020-10-28 09:08:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:08:03,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 113 [2020-10-28 09:08:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:03,579 INFO L225 Difference]: With dead ends: 981 [2020-10-28 09:08:03,579 INFO L226 Difference]: Without dead ends: 548 [2020-10-28 09:08:03,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:08:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-28 09:08:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 498. [2020-10-28 09:08:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-10-28 09:08:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 664 transitions. [2020-10-28 09:08:03,604 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 664 transitions. Word has length 113 [2020-10-28 09:08:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:03,604 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 664 transitions. [2020-10-28 09:08:03,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:08:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 664 transitions. [2020-10-28 09:08:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-28 09:08:03,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:03,606 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:03,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:08:03,606 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:03,607 INFO L82 PathProgramCache]: Analyzing trace with hash 641721031, now seen corresponding path program 9 times [2020-10-28 09:08:03,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:03,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296860475] [2020-10-28 09:08:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:03,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:04,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 09:08:08,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:08:08,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:08,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:08,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:08,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:08,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:08,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:08,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:08:08,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:08,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:08,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-28 09:08:08,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296860475] [2020-10-28 09:08:08,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:08,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:08:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418224481] [2020-10-28 09:08:08,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:08:08,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:08:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:08:08,830 INFO L87 Difference]: Start difference. First operand 498 states and 664 transitions. Second operand 13 states. [2020-10-28 09:08:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:09,173 INFO L93 Difference]: Finished difference Result 1063 states and 1432 transitions. [2020-10-28 09:08:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:08:09,174 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 125 [2020-10-28 09:08:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:09,178 INFO L225 Difference]: With dead ends: 1063 [2020-10-28 09:08:09,178 INFO L226 Difference]: Without dead ends: 590 [2020-10-28 09:08:09,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:08:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-10-28 09:08:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 540. [2020-10-28 09:08:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-10-28 09:08:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 720 transitions. [2020-10-28 09:08:09,208 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 720 transitions. Word has length 125 [2020-10-28 09:08:09,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:09,208 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 720 transitions. [2020-10-28 09:08:09,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:08:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 720 transitions. [2020-10-28 09:08:09,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 09:08:09,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:09,211 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:09,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:08:09,211 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:09,212 INFO L82 PathProgramCache]: Analyzing trace with hash 811391148, now seen corresponding path program 10 times [2020-10-28 09:08:09,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:09,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677357305] [2020-10-28 09:08:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:09,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:09,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:09,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:13,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:14,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:14,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 09:08:14,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:08:14,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:08:14,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:14,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:14,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:08:14,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:08:14,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 09:08:14,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:14,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:14,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:14,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:14,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:14,676 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 178 proven. 204 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2020-10-28 09:08:14,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677357305] [2020-10-28 09:08:14,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:14,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:08:14,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651035364] [2020-10-28 09:08:14,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:08:14,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:08:14,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:14,679 INFO L87 Difference]: Start difference. First operand 540 states and 720 transitions. Second operand 17 states. [2020-10-28 09:08:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:16,672 INFO L93 Difference]: Finished difference Result 726 states and 968 transitions. [2020-10-28 09:08:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:08:16,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 137 [2020-10-28 09:08:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:16,681 INFO L225 Difference]: With dead ends: 726 [2020-10-28 09:08:16,682 INFO L226 Difference]: Without dead ends: 670 [2020-10-28 09:08:16,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 09:08:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-28 09:08:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 613. [2020-10-28 09:08:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613 states. [2020-10-28 09:08:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 819 transitions. [2020-10-28 09:08:16,712 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 819 transitions. Word has length 137 [2020-10-28 09:08:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:16,713 INFO L481 AbstractCegarLoop]: Abstraction has 613 states and 819 transitions. [2020-10-28 09:08:16,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:08:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 819 transitions. [2020-10-28 09:08:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-28 09:08:16,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:16,716 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:16,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:08:16,716 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash -560416150, now seen corresponding path program 11 times [2020-10-28 09:08:16,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:16,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62720213] [2020-10-28 09:08:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:16,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:16,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:16,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:17,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:21,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:08:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:21,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:21,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:21,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:21,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:21,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:21,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:21,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:21,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:21,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:21,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:21,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:21,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-28 09:08:21,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62720213] [2020-10-28 09:08:21,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:21,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:08:21,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871526961] [2020-10-28 09:08:21,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:08:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:08:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:08:21,963 INFO L87 Difference]: Start difference. First operand 613 states and 819 transitions. Second operand 14 states. [2020-10-28 09:08:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:22,310 INFO L93 Difference]: Finished difference Result 1296 states and 1748 transitions. [2020-10-28 09:08:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:08:22,311 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 137 [2020-10-28 09:08:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:22,315 INFO L225 Difference]: With dead ends: 1296 [2020-10-28 09:08:22,315 INFO L226 Difference]: Without dead ends: 710 [2020-10-28 09:08:22,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:08:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-10-28 09:08:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 658. [2020-10-28 09:08:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-10-28 09:08:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 879 transitions. [2020-10-28 09:08:22,347 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 879 transitions. Word has length 137 [2020-10-28 09:08:22,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:22,348 INFO L481 AbstractCegarLoop]: Abstraction has 658 states and 879 transitions. [2020-10-28 09:08:22,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:08:22,348 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 879 transitions. [2020-10-28 09:08:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 09:08:22,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:22,351 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:22,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:08:22,351 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2062042587, now seen corresponding path program 12 times [2020-10-28 09:08:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:22,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33837746] [2020-10-28 09:08:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:22,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:22,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:22,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:25,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:27,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:27,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 09:08:27,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:08:27,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:08:27,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:27,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:27,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:27,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:27,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-10-28 09:08:27,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33837746] [2020-10-28 09:08:27,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:27,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:08:27,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122866278] [2020-10-28 09:08:27,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:08:27,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:08:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:08:27,645 INFO L87 Difference]: Start difference. First operand 658 states and 879 transitions. Second operand 15 states. [2020-10-28 09:08:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:28,070 INFO L93 Difference]: Finished difference Result 1384 states and 1866 transitions. [2020-10-28 09:08:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:08:28,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 149 [2020-10-28 09:08:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:28,079 INFO L225 Difference]: With dead ends: 1384 [2020-10-28 09:08:28,079 INFO L226 Difference]: Without dead ends: 755 [2020-10-28 09:08:28,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:08:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2020-10-28 09:08:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 703. [2020-10-28 09:08:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-10-28 09:08:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 939 transitions. [2020-10-28 09:08:28,112 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 939 transitions. Word has length 149 [2020-10-28 09:08:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:28,112 INFO L481 AbstractCegarLoop]: Abstraction has 703 states and 939 transitions. [2020-10-28 09:08:28,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:08:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 939 transitions. [2020-10-28 09:08:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 09:08:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:28,115 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:28,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:08:28,116 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1618320506, now seen corresponding path program 13 times [2020-10-28 09:08:28,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:28,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420857095] [2020-10-28 09:08:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:28,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:28,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:29,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:31,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:33,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:33,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 09:08:33,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:08:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 09:08:33,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:33,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:08:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:08:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 09:08:33,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:33,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:33,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:33,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:33,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:33,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:08:33,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:33,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:33,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:33,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 256 proven. 293 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2020-10-28 09:08:33,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420857095] [2020-10-28 09:08:33,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:33,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:08:33,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226388946] [2020-10-28 09:08:33,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:08:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:08:33,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:08:33,683 INFO L87 Difference]: Start difference. First operand 703 states and 939 transitions. Second operand 19 states. [2020-10-28 09:08:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:36,144 INFO L93 Difference]: Finished difference Result 926 states and 1237 transitions. [2020-10-28 09:08:36,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 09:08:36,144 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 161 [2020-10-28 09:08:36,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:36,150 INFO L225 Difference]: With dead ends: 926 [2020-10-28 09:08:36,150 INFO L226 Difference]: Without dead ends: 859 [2020-10-28 09:08:36,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=195, Invalid=2061, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:08:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2020-10-28 09:08:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 790. [2020-10-28 09:08:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 790 states. [2020-10-28 09:08:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1057 transitions. [2020-10-28 09:08:36,181 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1057 transitions. Word has length 161 [2020-10-28 09:08:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:36,181 INFO L481 AbstractCegarLoop]: Abstraction has 790 states and 1057 transitions. [2020-10-28 09:08:36,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:08:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1057 transitions. [2020-10-28 09:08:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-28 09:08:36,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:36,185 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:36,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:08:36,185 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:36,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:36,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1971408888, now seen corresponding path program 14 times [2020-10-28 09:08:36,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:36,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081489761] [2020-10-28 09:08:36,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:36,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:36,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:36,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:37,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:41,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-28 09:08:41,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:08:41,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 09:08:41,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:41,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:08:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:08:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:08:41,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:41,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:41,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:41,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:41,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:41,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2020-10-28 09:08:41,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081489761] [2020-10-28 09:08:41,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:41,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:08:41,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30098825] [2020-10-28 09:08:41,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:08:41,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:41,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:08:41,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:41,492 INFO L87 Difference]: Start difference. First operand 790 states and 1057 transitions. Second operand 16 states. [2020-10-28 09:08:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:41,931 INFO L93 Difference]: Finished difference Result 1651 states and 2228 transitions. [2020-10-28 09:08:41,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:08:41,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 161 [2020-10-28 09:08:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:41,937 INFO L225 Difference]: With dead ends: 1651 [2020-10-28 09:08:41,937 INFO L226 Difference]: Without dead ends: 892 [2020-10-28 09:08:41,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:08:41,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-10-28 09:08:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 838. [2020-10-28 09:08:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 838 states. [2020-10-28 09:08:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1121 transitions. [2020-10-28 09:08:41,970 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1121 transitions. Word has length 161 [2020-10-28 09:08:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:41,970 INFO L481 AbstractCegarLoop]: Abstraction has 838 states and 1121 transitions. [2020-10-28 09:08:41,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:08:41,970 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1121 transitions. [2020-10-28 09:08:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 09:08:41,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:41,974 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:41,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:08:41,974 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:41,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:41,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2134158145, now seen corresponding path program 15 times [2020-10-28 09:08:41,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:41,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164803885] [2020-10-28 09:08:41,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:42,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:42,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:45,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:47,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:08:47,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:08:47,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-28 09:08:47,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:47,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:47,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:47,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:47,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 296 proven. 375 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2020-10-28 09:08:47,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164803885] [2020-10-28 09:08:47,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:47,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:08:47,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552535852] [2020-10-28 09:08:47,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:08:47,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:47,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:08:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:08:47,566 INFO L87 Difference]: Start difference. First operand 838 states and 1121 transitions. Second operand 21 states. [2020-10-28 09:08:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:50,650 INFO L93 Difference]: Finished difference Result 1072 states and 1434 transitions. [2020-10-28 09:08:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-28 09:08:50,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 173 [2020-10-28 09:08:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:50,658 INFO L225 Difference]: With dead ends: 1072 [2020-10-28 09:08:50,658 INFO L226 Difference]: Without dead ends: 1005 [2020-10-28 09:08:50,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=2641, Unknown=0, NotChecked=0, Total=2862 [2020-10-28 09:08:50,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-10-28 09:08:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 936. [2020-10-28 09:08:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 936 states. [2020-10-28 09:08:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1254 transitions. [2020-10-28 09:08:50,695 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1254 transitions. Word has length 173 [2020-10-28 09:08:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:50,695 INFO L481 AbstractCegarLoop]: Abstraction has 936 states and 1254 transitions. [2020-10-28 09:08:50,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:08:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1254 transitions. [2020-10-28 09:08:50,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-28 09:08:50,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:50,700 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:50,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:08:50,700 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1807720769, now seen corresponding path program 16 times [2020-10-28 09:08:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:50,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781468036] [2020-10-28 09:08:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:50,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:50,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:52,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:55,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:55,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-28 09:08:55,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:08:55,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:08:55,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:08:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:55,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:56,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:08:56,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:08:56,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:08:56,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:08:56,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:08:56,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:08:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:08:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:08:56,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:08:56,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:08:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-28 09:08:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781468036] [2020-10-28 09:08:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:08:56,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:08:56,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708750346] [2020-10-28 09:08:56,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:08:56,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:08:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:08:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:56,051 INFO L87 Difference]: Start difference. First operand 936 states and 1254 transitions. Second operand 17 states. [2020-10-28 09:08:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:08:56,566 INFO L93 Difference]: Finished difference Result 1946 states and 2628 transitions. [2020-10-28 09:08:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:08:56,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 173 [2020-10-28 09:08:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:08:56,573 INFO L225 Difference]: With dead ends: 1946 [2020-10-28 09:08:56,573 INFO L226 Difference]: Without dead ends: 1043 [2020-10-28 09:08:56,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:08:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-10-28 09:08:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 987. [2020-10-28 09:08:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987 states. [2020-10-28 09:08:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1322 transitions. [2020-10-28 09:08:56,615 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1322 transitions. Word has length 173 [2020-10-28 09:08:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:08:56,616 INFO L481 AbstractCegarLoop]: Abstraction has 987 states and 1322 transitions. [2020-10-28 09:08:56,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:08:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1322 transitions. [2020-10-28 09:08:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-28 09:08:56,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:08:56,620 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:08:56,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:08:56,621 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:08:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:08:56,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1069037794, now seen corresponding path program 17 times [2020-10-28 09:08:56,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:08:56,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893744241] [2020-10-28 09:08:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:08:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:08:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:08:58,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:01,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:01,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 09:09:01,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:01,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:01,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:01,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:01,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:01,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:01,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:09:01,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:01,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:01,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:01,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:01,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:01,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-28 09:09:01,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893744241] [2020-10-28 09:09:01,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:01,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:09:01,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173271496] [2020-10-28 09:09:01,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:09:01,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:01,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:09:01,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:09:01,993 INFO L87 Difference]: Start difference. First operand 987 states and 1322 transitions. Second operand 18 states. [2020-10-28 09:09:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:02,465 INFO L93 Difference]: Finished difference Result 2046 states and 2762 transitions. [2020-10-28 09:09:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:09:02,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 185 [2020-10-28 09:09:02,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:02,470 INFO L225 Difference]: With dead ends: 2046 [2020-10-28 09:09:02,470 INFO L226 Difference]: Without dead ends: 1094 [2020-10-28 09:09:02,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:09:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-10-28 09:09:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1038. [2020-10-28 09:09:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2020-10-28 09:09:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1390 transitions. [2020-10-28 09:09:02,510 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1390 transitions. Word has length 185 [2020-10-28 09:09:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:02,510 INFO L481 AbstractCegarLoop]: Abstraction has 1038 states and 1390 transitions. [2020-10-28 09:09:02,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:09:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1390 transitions. [2020-10-28 09:09:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 09:09:02,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:02,514 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:02,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:09:02,515 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1874105187, now seen corresponding path program 18 times [2020-10-28 09:09:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:02,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652886894] [2020-10-28 09:09:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:02,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:02,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:07,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:07,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 09:09:07,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:09:07,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-28 09:09:07,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:07,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:09:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:09:07,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 09:09:07,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:08,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:08,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:08,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:08,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 395 proven. 493 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-28 09:09:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652886894] [2020-10-28 09:09:08,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:08,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:09:08,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40611175] [2020-10-28 09:09:08,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:09:08,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:09:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:09:08,254 INFO L87 Difference]: Start difference. First operand 1038 states and 1390 transitions. Second operand 23 states. [2020-10-28 09:09:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:11,909 INFO L93 Difference]: Finished difference Result 1309 states and 1753 transitions. [2020-10-28 09:09:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-28 09:09:11,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 197 [2020-10-28 09:09:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:11,917 INFO L225 Difference]: With dead ends: 1309 [2020-10-28 09:09:11,917 INFO L226 Difference]: Without dead ends: 1231 [2020-10-28 09:09:11,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:09:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2020-10-28 09:09:11,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1150. [2020-10-28 09:09:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2020-10-28 09:09:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1542 transitions. [2020-10-28 09:09:11,961 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1542 transitions. Word has length 197 [2020-10-28 09:09:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:11,961 INFO L481 AbstractCegarLoop]: Abstraction has 1150 states and 1542 transitions. [2020-10-28 09:09:11,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:09:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1542 transitions. [2020-10-28 09:09:11,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 09:09:11,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:11,966 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:11,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:09:11,966 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:11,967 INFO L82 PathProgramCache]: Analyzing trace with hash -998086181, now seen corresponding path program 19 times [2020-10-28 09:09:11,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:11,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788587451] [2020-10-28 09:09:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:12,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:12,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:15,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:17,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:17,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 09:09:17,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:09:17,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-28 09:09:17,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:17,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:09:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:09:17,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:09:17,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:17,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:17,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:17,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:17,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2020-10-28 09:09:17,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788587451] [2020-10-28 09:09:17,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:17,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:09:17,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128714784] [2020-10-28 09:09:17,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:09:17,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:09:17,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:09:17,370 INFO L87 Difference]: Start difference. First operand 1150 states and 1542 transitions. Second operand 19 states. [2020-10-28 09:09:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:17,921 INFO L93 Difference]: Finished difference Result 2375 states and 3208 transitions. [2020-10-28 09:09:17,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:09:17,921 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 197 [2020-10-28 09:09:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:17,927 INFO L225 Difference]: With dead ends: 2375 [2020-10-28 09:09:17,927 INFO L226 Difference]: Without dead ends: 1262 [2020-10-28 09:09:17,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:09:17,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2020-10-28 09:09:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1204. [2020-10-28 09:09:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2020-10-28 09:09:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1614 transitions. [2020-10-28 09:09:17,972 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1614 transitions. Word has length 197 [2020-10-28 09:09:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:17,972 INFO L481 AbstractCegarLoop]: Abstraction has 1204 states and 1614 transitions. [2020-10-28 09:09:17,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:09:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1614 transitions. [2020-10-28 09:09:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-28 09:09:17,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:17,976 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:17,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:09:17,976 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -9826560, now seen corresponding path program 20 times [2020-10-28 09:09:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:17,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294318039] [2020-10-28 09:09:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:18,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:18,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:22,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5162 [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:09:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 09:09:23,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 09:09:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:23,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:23,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:23,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:23,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:23,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:23,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2020-10-28 09:09:23,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294318039] [2020-10-28 09:09:23,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:23,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:09:23,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238501940] [2020-10-28 09:09:23,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:09:23,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:09:23,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:09:23,531 INFO L87 Difference]: Start difference. First operand 1204 states and 1614 transitions. Second operand 20 states. [2020-10-28 09:09:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:24,122 INFO L93 Difference]: Finished difference Result 2481 states and 3350 transitions. [2020-10-28 09:09:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:09:24,122 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 209 [2020-10-28 09:09:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:24,128 INFO L225 Difference]: With dead ends: 2481 [2020-10-28 09:09:24,129 INFO L226 Difference]: Without dead ends: 1316 [2020-10-28 09:09:24,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:09:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2020-10-28 09:09:24,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1258. [2020-10-28 09:09:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-28 09:09:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1686 transitions. [2020-10-28 09:09:24,176 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1686 transitions. Word has length 209 [2020-10-28 09:09:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:24,176 INFO L481 AbstractCegarLoop]: Abstraction has 1258 states and 1686 transitions. [2020-10-28 09:09:24,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:09:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1686 transitions. [2020-10-28 09:09:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 09:09:24,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:24,180 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:24,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:09:24,180 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:24,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:24,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1688301239, now seen corresponding path program 21 times [2020-10-28 09:09:24,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:24,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287616023] [2020-10-28 09:09:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:24,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:26,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:29,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:29,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-28 09:09:29,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:29,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:29,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:29,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:29,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:29,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:29,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:29,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:29,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:29,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 09:09:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 508 proven. 627 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2020-10-28 09:09:30,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287616023] [2020-10-28 09:09:30,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:30,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:09:30,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101339614] [2020-10-28 09:09:30,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:09:30,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:30,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:09:30,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:09:30,009 INFO L87 Difference]: Start difference. First operand 1258 states and 1686 transitions. Second operand 25 states. [2020-10-28 09:09:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:34,360 INFO L93 Difference]: Finished difference Result 1566 states and 2099 transitions. [2020-10-28 09:09:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 09:09:34,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 221 [2020-10-28 09:09:34,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:34,373 INFO L225 Difference]: With dead ends: 1566 [2020-10-28 09:09:34,373 INFO L226 Difference]: Without dead ends: 1477 [2020-10-28 09:09:34,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=273, Invalid=4017, Unknown=0, NotChecked=0, Total=4290 [2020-10-28 09:09:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2020-10-28 09:09:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1384. [2020-10-28 09:09:34,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2020-10-28 09:09:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1857 transitions. [2020-10-28 09:09:34,424 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1857 transitions. Word has length 221 [2020-10-28 09:09:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:34,425 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 1857 transitions. [2020-10-28 09:09:34,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:09:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1857 transitions. [2020-10-28 09:09:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-28 09:09:34,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:34,429 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:34,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:09:34,429 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -645091399, now seen corresponding path program 22 times [2020-10-28 09:09:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:34,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122230651] [2020-10-28 09:09:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:34,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:34,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:39,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:39,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:39,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-28 09:09:39,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:09:39,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:09:39,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:39,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:09:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:09:39,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 09:09:39,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:39,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:39,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:39,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:39,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:39,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:39,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-10-28 09:09:39,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122230651] [2020-10-28 09:09:39,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:39,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:09:39,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517045926] [2020-10-28 09:09:39,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:09:39,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:39,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:09:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:09:39,850 INFO L87 Difference]: Start difference. First operand 1384 states and 1857 transitions. Second operand 21 states. [2020-10-28 09:09:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:40,492 INFO L93 Difference]: Finished difference Result 2844 states and 3842 transitions. [2020-10-28 09:09:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:09:40,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 221 [2020-10-28 09:09:40,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:40,499 INFO L225 Difference]: With dead ends: 2844 [2020-10-28 09:09:40,499 INFO L226 Difference]: Without dead ends: 1501 [2020-10-28 09:09:40,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:09:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2020-10-28 09:09:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1441. [2020-10-28 09:09:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1441 states. [2020-10-28 09:09:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 1933 transitions. [2020-10-28 09:09:40,553 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 1933 transitions. Word has length 221 [2020-10-28 09:09:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:40,553 INFO L481 AbstractCegarLoop]: Abstraction has 1441 states and 1933 transitions. [2020-10-28 09:09:40,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:09:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 1933 transitions. [2020-10-28 09:09:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-28 09:09:40,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:40,558 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:40,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:09:40,558 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1238474586, now seen corresponding path program 23 times [2020-10-28 09:09:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:40,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839006523] [2020-10-28 09:09:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:40,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:40,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:41,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:45,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-28 09:09:45,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:46,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:46,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:46,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:46,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:46,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:46,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:09:46,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:46,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:46,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 562 proven. 745 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2020-10-28 09:09:46,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839006523] [2020-10-28 09:09:46,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:46,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:09:46,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597469739] [2020-10-28 09:09:46,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:09:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:09:46,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:09:46,434 INFO L87 Difference]: Start difference. First operand 1441 states and 1933 transitions. Second operand 27 states. [2020-10-28 09:09:51,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:51,531 INFO L93 Difference]: Finished difference Result 1760 states and 2361 transitions. [2020-10-28 09:09:51,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-28 09:09:51,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 233 [2020-10-28 09:09:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:51,539 INFO L225 Difference]: With dead ends: 1760 [2020-10-28 09:09:51,539 INFO L226 Difference]: Without dead ends: 1671 [2020-10-28 09:09:51,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=299, Invalid=4813, Unknown=0, NotChecked=0, Total=5112 [2020-10-28 09:09:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2020-10-28 09:09:51,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1578. [2020-10-28 09:09:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-10-28 09:09:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2119 transitions. [2020-10-28 09:09:51,598 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2119 transitions. Word has length 233 [2020-10-28 09:09:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:51,598 INFO L481 AbstractCegarLoop]: Abstraction has 1578 states and 2119 transitions. [2020-10-28 09:09:51,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:09:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2119 transitions. [2020-10-28 09:09:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-28 09:09:51,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:51,603 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:51,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:09:51,604 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:51,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1094918052, now seen corresponding path program 24 times [2020-10-28 09:09:51,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:51,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883474354] [2020-10-28 09:09:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:51,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:51,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:51,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:56,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:56,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-28 09:09:56,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:09:56,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:09:56,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:56,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:09:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 09:09:56,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:09:56,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:57,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:09:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:57,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:57,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:09:57,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:09:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:09:57,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:09:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1413 trivial. 0 not checked. [2020-10-28 09:09:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883474354] [2020-10-28 09:09:57,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:09:57,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:09:57,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284743264] [2020-10-28 09:09:57,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:09:57,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:09:57,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:09:57,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:09:57,095 INFO L87 Difference]: Start difference. First operand 1578 states and 2119 transitions. Second operand 22 states. [2020-10-28 09:09:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:09:57,701 INFO L93 Difference]: Finished difference Result 3235 states and 4372 transitions. [2020-10-28 09:09:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:09:57,701 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 233 [2020-10-28 09:09:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:09:57,708 INFO L225 Difference]: With dead ends: 3235 [2020-10-28 09:09:57,709 INFO L226 Difference]: Without dead ends: 1700 [2020-10-28 09:09:57,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:09:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2020-10-28 09:09:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1638. [2020-10-28 09:09:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-10-28 09:09:57,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2199 transitions. [2020-10-28 09:09:57,767 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2199 transitions. Word has length 233 [2020-10-28 09:09:57,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:09:57,767 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2199 transitions. [2020-10-28 09:09:57,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:09:57,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2199 transitions. [2020-10-28 09:09:57,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-28 09:09:57,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:09:57,772 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:09:57,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:09:57,772 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:09:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:09:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash 552067027, now seen corresponding path program 25 times [2020-10-28 09:09:57,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:09:57,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900746215] [2020-10-28 09:09:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:09:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:09:57,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:09:58,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:00,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:02,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:02,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 255 [2020-10-28 09:10:02,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:10:02,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 09:10:02,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:02,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:10:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-28 09:10:02,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 09:10:02,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:03,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:03,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:03,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:03,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1577 trivial. 0 not checked. [2020-10-28 09:10:03,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900746215] [2020-10-28 09:10:03,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:03,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:10:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283551614] [2020-10-28 09:10:03,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:10:03,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:10:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:10:03,288 INFO L87 Difference]: Start difference. First operand 1638 states and 2199 transitions. Second operand 23 states. [2020-10-28 09:10:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:03,915 INFO L93 Difference]: Finished difference Result 3353 states and 4530 transitions. [2020-10-28 09:10:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:10:03,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 245 [2020-10-28 09:10:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:03,922 INFO L225 Difference]: With dead ends: 3353 [2020-10-28 09:10:03,922 INFO L226 Difference]: Without dead ends: 1760 [2020-10-28 09:10:03,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:10:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2020-10-28 09:10:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1698. [2020-10-28 09:10:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1698 states. [2020-10-28 09:10:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2279 transitions. [2020-10-28 09:10:03,978 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2279 transitions. Word has length 245 [2020-10-28 09:10:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:03,979 INFO L481 AbstractCegarLoop]: Abstraction has 1698 states and 2279 transitions. [2020-10-28 09:10:03,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:10:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2279 transitions. [2020-10-28 09:10:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-28 09:10:03,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:03,984 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:03,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:10:03,984 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1566668280, now seen corresponding path program 26 times [2020-10-28 09:10:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:03,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922906488] [2020-10-28 09:10:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:04,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:04,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:04,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 09:10:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 09:10:09,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:09,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:10:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:09,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:09,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:10:09,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:10:09,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:10:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:10:09,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:10:09,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:10:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:10:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:10:09,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:10:09,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:10:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1750 trivial. 0 not checked. [2020-10-28 09:10:09,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922906488] [2020-10-28 09:10:09,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:10:09,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:10:09,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525707496] [2020-10-28 09:10:09,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:10:09,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:10:09,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:10:09,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:10:09,558 INFO L87 Difference]: Start difference. First operand 1698 states and 2279 transitions. Second operand 24 states. [2020-10-28 09:10:10,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:10:10,230 INFO L93 Difference]: Finished difference Result 3471 states and 4688 transitions. [2020-10-28 09:10:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:10:10,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 257 [2020-10-28 09:10:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:10:10,238 INFO L225 Difference]: With dead ends: 3471 [2020-10-28 09:10:10,238 INFO L226 Difference]: Without dead ends: 1820 [2020-10-28 09:10:10,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:10:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2020-10-28 09:10:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1758. [2020-10-28 09:10:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1758 states. [2020-10-28 09:10:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2359 transitions. [2020-10-28 09:10:10,295 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2359 transitions. Word has length 257 [2020-10-28 09:10:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:10:10,295 INFO L481 AbstractCegarLoop]: Abstraction has 1758 states and 2359 transitions. [2020-10-28 09:10:10,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:10:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2359 transitions. [2020-10-28 09:10:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-28 09:10:10,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:10:10,301 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:10:10,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:10:10,301 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:10:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:10:10,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2106183505, now seen corresponding path program 27 times [2020-10-28 09:10:10,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:10:10,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819486815] [2020-10-28 09:10:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:10:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:10:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:10,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:10:11,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking...