/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:23,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:23,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:23,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:23,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:23,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:23,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:23,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:23,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:23,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:23,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:24,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:24,000 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:24,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:24,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:24,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:24,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:24,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:24,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:24,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:24,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:24,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:24,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:24,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:24,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:24,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:24,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:24,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:24,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:24,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:24,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:24,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:24,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:24,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:24,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:24,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:24,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:24,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:24,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:24,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:24,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:24,043 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 [2020-09-21 11:32:24,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:24,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:24,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:24,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:24,082 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:24,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:24,083 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:24,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:24,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:24,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:24,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:24,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:24,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:24,084 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:24,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:24,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:24,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:24,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:24,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:24,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:24,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:24,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:24,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:24,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:24,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:24,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:24,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:24,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:24,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:24,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.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;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:24,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:24,581 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:24,591 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:24,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:24,593 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:24,594 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-09-21 11:32:24,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2157cc16c/b872ca9e2cc44c47ae4db918a912aa09/FLAG7fd2b7faf [2020-09-21 11:32:25,190 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:25,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2020-09-21 11:32:25,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2157cc16c/b872ca9e2cc44c47ae4db918a912aa09/FLAG7fd2b7faf [2020-09-21 11:32:25,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2157cc16c/b872ca9e2cc44c47ae4db918a912aa09 [2020-09-21 11:32:25,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:25,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:25,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:25,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:25,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:25,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:25" (1/1) ... [2020-09-21 11:32:25,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cc622fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:25, skipping insertion in model container [2020-09-21 11:32:25,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:25" (1/1) ... [2020-09-21 11:32:25,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:25,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:25,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:25,967 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:26,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:26,144 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:26,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26 WrapperNode [2020-09-21 11:32:26,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:26,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:26,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:26,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:26,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (1/1) ... [2020-09-21 11:32:26,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:26,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:26,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:26,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:26,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (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 [2020-09-21 11:32:26,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:26,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:26,303 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-09-21 11:32:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-09-21 11:32:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:32:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:32:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-21 11:32:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-21 11:32:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:32:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-21 11:32:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:32:29,040 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:29,040 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 11:32:29,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:29 BoogieIcfgContainer [2020-09-21 11:32:29,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:29,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:29,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:29,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:29,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:25" (1/3) ... [2020-09-21 11:32:29,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f00ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:29, skipping insertion in model container [2020-09-21 11:32:29,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:26" (2/3) ... [2020-09-21 11:32:29,056 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f00ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:29, skipping insertion in model container [2020-09-21 11:32:29,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:29" (3/3) ... [2020-09-21 11:32:29,061 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2020-09-21 11:32:29,073 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:29,083 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:29,105 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:29,138 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:29,138 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:29,138 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:29,138 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:29,139 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:29,139 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:29,139 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:29,139 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 11:32:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:32:29,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:29,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:29,175 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1960518123, now seen corresponding path program 1 times [2020-09-21 11:32:29,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:29,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989243775] [2020-09-21 11:32:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:29,779 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:29,780 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:29,780 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:29,780 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:29,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-21 11:32:29,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-09-21 11:32:29,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:32:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:29,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:29,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:29,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:29,945 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:29,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:29,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:29,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:29,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989243775] [2020-09-21 11:32:29,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:29,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:29,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961201986] [2020-09-21 11:32:29,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:29,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:29,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:29,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:29,991 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-09-21 11:32:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:32,212 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-09-21 11:32:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:32:32,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-21 11:32:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:32,226 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:32:32,226 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:32:32,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:32:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-09-21 11:32:32,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:32:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-21 11:32:32,278 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2020-09-21 11:32:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:32,279 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-21 11:32:32,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-21 11:32:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:32:32,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:32,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:32,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:32,281 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1182240945, now seen corresponding path program 1 times [2020-09-21 11:32:32,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:32,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928896850] [2020-09-21 11:32:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:32,526 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:32,526 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:32,527 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:32,527 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:32,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:32:32,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:32,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-09-21 11:32:32,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:32,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:32,690 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:32,690 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:32,691 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:32,691 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:32,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:32,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:32,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928896850] [2020-09-21 11:32:32,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:32,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:32:32,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800515650] [2020-09-21 11:32:32,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:32:32,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:32:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:32,707 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-09-21 11:32:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:36,961 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-21 11:32:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:32:36,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-21 11:32:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:36,965 INFO L225 Difference]: With dead ends: 29 [2020-09-21 11:32:36,965 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:32:36,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:32:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-09-21 11:32:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:32:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-21 11:32:36,978 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-09-21 11:32:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:36,979 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-21 11:32:36,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:32:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-21 11:32:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:32:36,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:36,981 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:36,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:36,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:36,982 INFO L82 PathProgramCache]: Analyzing trace with hash 491744683, now seen corresponding path program 2 times [2020-09-21 11:32:36,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:36,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031459008] [2020-09-21 11:32:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:37,225 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:37,226 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:37,226 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:37,227 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:37,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:32:37,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:37,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-09-21 11:32:37,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:32:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:37,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:32:37,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:37,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:37,376 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:37,376 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:37,376 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:37,377 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:37,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:37,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:37,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:37,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:37,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:37,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:37,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031459008] [2020-09-21 11:32:37,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:37,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:32:37,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354283714] [2020-09-21 11:32:37,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:37,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:37,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:37,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:37,389 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2020-09-21 11:32:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:43,654 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-21 11:32:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:43,654 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-09-21 11:32:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:43,656 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:32:43,656 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:32:43,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:32:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-09-21 11:32:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-21 11:32:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-21 11:32:43,663 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2020-09-21 11:32:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:43,663 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-21 11:32:43,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-21 11:32:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:32:43,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:43,665 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:43,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:43,665 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 161258737, now seen corresponding path program 3 times [2020-09-21 11:32:43,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:43,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136881880] [2020-09-21 11:32:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:43,858 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:43,858 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:43,858 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:43,859 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:43,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:32:43,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:43,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-09-21 11:32:43,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:43,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:43,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:43,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 11:32:43,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:44,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:44,012 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:44,013 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:44,013 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:44,013 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:44,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:44,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:44,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:44,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:44,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:44,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:44,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:44,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:44,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136881880] [2020-09-21 11:32:44,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:44,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:44,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009918185] [2020-09-21 11:32:44,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:44,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:44,053 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 8 states. [2020-09-21 11:32:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:52,385 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-21 11:32:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:52,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-21 11:32:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:52,387 INFO L225 Difference]: With dead ends: 39 [2020-09-21 11:32:52,387 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:32:52,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:32:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-09-21 11:32:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:32:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-21 11:32:52,394 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2020-09-21 11:32:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:52,395 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-21 11:32:52,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-21 11:32:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:32:52,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:52,396 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:52,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:52,397 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1890060651, now seen corresponding path program 4 times [2020-09-21 11:32:52,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:52,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725924161] [2020-09-21 11:32:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,629 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:52,629 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,629 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:32:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-09-21 11:32:52,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:32:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:32:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:52,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:52,851 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:52,852 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:52,852 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:52,852 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:52,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:52,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:52,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:52,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:52,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:52,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:32:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:52,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725924161] [2020-09-21 11:32:52,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:52,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:52,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421253356] [2020-09-21 11:32:52,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:52,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:52,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:52,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:52,871 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 9 states. [2020-09-21 11:33:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:03,280 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-21 11:33:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:33:03,280 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-09-21 11:33:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:03,281 INFO L225 Difference]: With dead ends: 44 [2020-09-21 11:33:03,281 INFO L226 Difference]: Without dead ends: 41 [2020-09-21 11:33:03,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:33:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-21 11:33:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-09-21 11:33:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:33:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-21 11:33:03,294 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2020-09-21 11:33:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:03,295 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-21 11:33:03,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:33:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-21 11:33:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 11:33:03,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:03,298 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:03,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:33:03,299 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -737191631, now seen corresponding path program 5 times [2020-09-21 11:33:03,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:03,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408457795] [2020-09-21 11:33:03,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:03,561 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:03,561 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:03,561 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:03,562 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:03,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:33:03,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-09-21 11:33:03,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:33:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:33:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-21 11:33:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:03,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:03,796 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:03,796 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:03,797 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:03,797 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:03,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:03,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:03,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:03,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:03,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:03,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:03,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:03,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:33:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:03,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408457795] [2020-09-21 11:33:03,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:03,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:33:03,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239453742] [2020-09-21 11:33:03,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:33:03,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:03,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:33:03,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:33:03,822 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 10 states. [2020-09-21 11:33:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:16,272 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-21 11:33:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:33:16,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-21 11:33:16,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:16,274 INFO L225 Difference]: With dead ends: 49 [2020-09-21 11:33:16,274 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:33:16,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:33:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:33:16,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-09-21 11:33:16,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:33:16,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-21 11:33:16,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2020-09-21 11:33:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:16,289 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-21 11:33:16,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:33:16,289 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-21 11:33:16,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:33:16,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:16,293 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:16,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:33:16,294 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1715407573, now seen corresponding path program 6 times [2020-09-21 11:33:16,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:16,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259416364] [2020-09-21 11:33:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,719 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:16,719 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,719 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,720 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:33:16,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-09-21 11:33:16,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:33:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:33:16,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:33:16,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:16,953 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:16,954 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:16,954 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:16,954 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:16,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:16,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:16,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:16,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259416364] [2020-09-21 11:33:16,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:16,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:33:16,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732173631] [2020-09-21 11:33:16,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:33:16,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:33:16,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:33:16,975 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 11 states. [2020-09-21 11:33:31,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:33:31,528 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-09-21 11:33:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:33:31,529 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-09-21 11:33:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:33:31,530 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:33:31,530 INFO L226 Difference]: Without dead ends: 51 [2020-09-21 11:33:31,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:33:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-21 11:33:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-09-21 11:33:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 11:33:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-21 11:33:31,538 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2020-09-21 11:33:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:33:31,538 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-21 11:33:31,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:33:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-21 11:33:31,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-21 11:33:31,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:33:31,540 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:33:31,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:33:31,540 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:33:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:33:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash -462174863, now seen corresponding path program 7 times [2020-09-21 11:33:31,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:33:31,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23171020] [2020-09-21 11:33:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:33:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:31,945 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:33:31,946 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:31,946 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:31,946 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:31,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-21 11:33:31,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:31,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-09-21 11:33:31,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:33:31,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:33:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-21 11:33:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:32,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:33:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:33:32,182 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:33:32,182 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:33:32,182 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:33:32,182 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:33:32,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:33:32,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:33:32,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:33:32,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:33:32,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:33:32,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:33:32,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:33:32,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:33:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:33:32,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23171020] [2020-09-21 11:33:32,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:33:32,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:33:32,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283054905] [2020-09-21 11:33:32,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:33:32,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:33:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:33:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:33:32,198 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 12 states.