/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:40,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:40,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:40,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:40,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:40,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:40,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:40,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:40,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:40,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:40,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:40,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:40,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:40,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:40,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:40,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:40,965 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:40,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:40,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:40,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:40,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:40,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:40,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:40,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:40,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:41,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:41,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:41,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:41,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:41,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 21:42:41,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:41,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:41,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:41,022 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 [2020-09-24 21:42:41,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:41,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:41,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:41,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:41,069 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:41,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:41,070 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:41,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:41,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:41,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:41,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:41,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:41,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:41,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:41,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:41,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:41,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:41,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:41,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:41,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:41,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:41,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:41,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:41,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:41,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:41,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:41,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:41,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:41,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:41,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement 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=LOWLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:42:41,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:41,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:41,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:41,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:41,551 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:41,552 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label33.c [2020-09-24 21:42:41,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28ce7507b/157873e501a34774b4c8b53720451f27/FLAG291b0ab0a [2020-09-24 21:42:42,315 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:42,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label33.c [2020-09-24 21:42:42,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28ce7507b/157873e501a34774b4c8b53720451f27/FLAG291b0ab0a [2020-09-24 21:42:42,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/28ce7507b/157873e501a34774b4c8b53720451f27 [2020-09-24 21:42:42,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:42,516 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:42,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:42,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:42,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:42,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4734e8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:42, skipping insertion in model container [2020-09-24 21:42:42,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:42" (1/1) ... [2020-09-24 21:42:42,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:42,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:42:43,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:43,027 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:42:43,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:42:43,265 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:42:43,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43 WrapperNode [2020-09-24 21:42:43,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:43,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:42:43,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:42:43,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:42:43,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (1/1) ... [2020-09-24 21:42:43,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:42:43,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:42:43,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:42:43,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:42:43,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (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 [2020-09-24 21:42:43,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:42:43,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:42:43,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:42:43,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:42:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:42:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:42:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:42:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:42:43,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:42:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:42:43,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:42:44,800 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:42:44,800 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:42:44,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:44 BoogieIcfgContainer [2020-09-24 21:42:44,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:42:44,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:42:44,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:42:44,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:42:44,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:42" (1/3) ... [2020-09-24 21:42:44,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e8696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:44, skipping insertion in model container [2020-09-24 21:42:44,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:43" (2/3) ... [2020-09-24 21:42:44,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e8696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:42:44, skipping insertion in model container [2020-09-24 21:42:44,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:42:44" (3/3) ... [2020-09-24 21:42:44,828 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label33.c [2020-09-24 21:42:44,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:42:44,858 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:42:44,881 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:42:44,927 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:42:44,928 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:42:44,928 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:42:44,929 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:42:44,929 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:42:44,929 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:42:44,929 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:42:44,929 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:42:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:42:45,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-24 21:42:45,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:42:45,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:42:45,022 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:42:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:42:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash 341026450, now seen corresponding path program 1 times [2020-09-24 21:42:45,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:42:45,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436210047] [2020-09-24 21:42:45,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:42:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:45,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:45,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:46,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:46,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:48,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:49,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:49,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:50,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:50,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-24 21:42:50,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:42:50,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-24 21:42:50,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:42:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:42:50,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:42:50,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:42:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:42:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:42:51,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:42:51,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:42:51,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:42:51,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:42:51,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 21:42:51,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:42:51,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:42:51,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:42:51,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:42:51,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:42:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:42:51,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436210047] [2020-09-24 21:42:51,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:42:51,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-09-24 21:42:51,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443063220] [2020-09-24 21:42:51,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:42:51,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:42:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:42:51,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:42:51,437 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 17 states. [2020-09-24 21:42:51,897 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:42:52,063 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:42:52,248 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-09-24 21:42:52,448 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-09-24 21:42:52,652 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:42:53,089 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-09-24 21:42:53,320 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:42:53,786 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-09-24 21:42:54,732 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:42:54,923 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-09-24 21:42:55,067 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-09-24 21:42:55,337 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:42:56,081 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-09-24 21:42:56,529 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-09-24 21:42:56,728 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:42:57,642 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:42:58,047 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:43:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:00,274 INFO L93 Difference]: Finished difference Result 1860 states and 2652 transitions. [2020-09-24 21:43:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:43:00,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 167 [2020-09-24 21:43:00,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:00,306 INFO L225 Difference]: With dead ends: 1860 [2020-09-24 21:43:00,307 INFO L226 Difference]: Without dead ends: 1230 [2020-09-24 21:43:00,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 21:43:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2020-09-24 21:43:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1070. [2020-09-24 21:43:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1070 states. [2020-09-24 21:43:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1287 transitions. [2020-09-24 21:43:00,455 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1287 transitions. Word has length 167 [2020-09-24 21:43:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:00,456 INFO L479 AbstractCegarLoop]: Abstraction has 1070 states and 1287 transitions. [2020-09-24 21:43:00,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:43:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1287 transitions. [2020-09-24 21:43:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-24 21:43:00,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:00,464 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:00,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:00,465 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:00,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:00,466 INFO L82 PathProgramCache]: Analyzing trace with hash 174833264, now seen corresponding path program 1 times [2020-09-24 21:43:00,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:00,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442893469] [2020-09-24 21:43:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:00,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:00,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:00,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:05,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:05,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-09-24 21:43:05,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:05,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-24 21:43:05,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:06,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:06,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:06,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:06,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 21:43:06,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:06,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:06,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:06,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:06,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:06,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:06,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 21:43:06,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:06,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:06,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:06,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:06,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:43:06,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442893469] [2020-09-24 21:43:06,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:06,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:06,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626169742] [2020-09-24 21:43:06,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:06,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:06,458 INFO L87 Difference]: Start difference. First operand 1070 states and 1287 transitions. Second operand 19 states. [2020-09-24 21:43:07,645 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-09-24 21:43:07,887 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2020-09-24 21:43:09,234 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-09-24 21:43:09,499 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-09-24 21:43:10,882 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-09-24 21:43:11,241 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 21:43:12,581 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-09-24 21:43:13,334 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 21:43:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:15,110 INFO L93 Difference]: Finished difference Result 4081 states and 5455 transitions. [2020-09-24 21:43:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:43:15,111 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 189 [2020-09-24 21:43:15,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:15,139 INFO L225 Difference]: With dead ends: 4081 [2020-09-24 21:43:15,140 INFO L226 Difference]: Without dead ends: 3091 [2020-09-24 21:43:15,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:43:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2020-09-24 21:43:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 3017. [2020-09-24 21:43:15,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2020-09-24 21:43:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3661 transitions. [2020-09-24 21:43:15,297 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3661 transitions. Word has length 189 [2020-09-24 21:43:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:15,298 INFO L479 AbstractCegarLoop]: Abstraction has 3017 states and 3661 transitions. [2020-09-24 21:43:15,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3661 transitions. [2020-09-24 21:43:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-09-24 21:43:15,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:15,316 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:15,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:15,316 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash -268934107, now seen corresponding path program 1 times [2020-09-24 21:43:15,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:15,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001434402] [2020-09-24 21:43:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:15,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:15,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:15,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:16,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:16,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:16,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:20,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-09-24 21:43:20,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 21:43:20,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-24 21:43:20,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:20,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-24 21:43:20,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:20,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:20,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:20,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:43:20,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:20,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:20,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:20,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:20,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:20,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:20,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:20,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:20,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:20,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 21:43:20,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:20,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:20,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:20,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:20,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:20,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:20,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:43:20,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:20,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:43:20,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:43:20,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:43:21,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001434402] [2020-09-24 21:43:21,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:21,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:43:21,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111732207] [2020-09-24 21:43:21,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:43:21,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:21,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:43:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:43:21,421 INFO L87 Difference]: Start difference. First operand 3017 states and 3661 transitions. Second operand 13 states. [2020-09-24 21:43:22,342 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-09-24 21:43:22,799 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-09-24 21:43:22,938 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-09-24 21:43:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:27,196 INFO L93 Difference]: Finished difference Result 8656 states and 11529 transitions. [2020-09-24 21:43:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:43:27,196 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 202 [2020-09-24 21:43:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:27,225 INFO L225 Difference]: With dead ends: 8656 [2020-09-24 21:43:27,226 INFO L226 Difference]: Without dead ends: 5397 [2020-09-24 21:43:27,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:43:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2020-09-24 21:43:27,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4711. [2020-09-24 21:43:27,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4711 states. [2020-09-24 21:43:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 5798 transitions. [2020-09-24 21:43:27,384 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 5798 transitions. Word has length 202 [2020-09-24 21:43:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:27,385 INFO L479 AbstractCegarLoop]: Abstraction has 4711 states and 5798 transitions. [2020-09-24 21:43:27,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:43:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 5798 transitions. [2020-09-24 21:43:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-09-24 21:43:27,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:27,406 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:43:27,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:43:27,406 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:27,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1380450301, now seen corresponding path program 1 times [2020-09-24 21:43:27,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:27,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288275751] [2020-09-24 21:43:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:32,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-09-24 21:43:32,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:43:32,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:43:32,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:32,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-24 21:43:32,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:43:32,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:32,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:32,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:32,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:32,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 21:43:32,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:43:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:32,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:43:32,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:32,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:32,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:32,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:32,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:43:32,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:43:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:32,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-24 21:43:32,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:32,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:32,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 21:43:32,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:32,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-24 21:43:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-24 21:43:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:32,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-24 21:43:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:32,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:32,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:32,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:32,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-24 21:43:32,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:32,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:43:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:43:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:43:32,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 85 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-24 21:43:32,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288275751] [2020-09-24 21:43:32,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:32,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:43:32,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028289530] [2020-09-24 21:43:32,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:43:32,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:43:32,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:43:32,881 INFO L87 Difference]: Start difference. First operand 4711 states and 5798 transitions. Second operand 8 states.