/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_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:43:21,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:43:21,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:43:21,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:43:21,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:43:21,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:43:21,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:43:21,941 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:43:21,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:43:21,944 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:43:21,945 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:43:21,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:43:21,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:43:21,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:43:21,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:43:21,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:43:21,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:43:21,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:43:21,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:43:21,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:43:21,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:43:21,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:43:21,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:43:21,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:43:21,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:43:21,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:43:21,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:43:21,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:43:21,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:43:21,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:43:21,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:43:21,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:43:21,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:43:21,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:43:21,976 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:43:21,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:43:21,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:43:21,977 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:43:21,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:43:21,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:43:21,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:43:21,980 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 21:43:22,026 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:43:22,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:43:22,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:43:22,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:43:22,029 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:43:22,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:43:22,030 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:43:22,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:43:22,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:43:22,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:43:22,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:43:22,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:43:22,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:43:22,032 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:43:22,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:43:22,033 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:43:22,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:43:22,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:43:22,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:43:22,034 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:43:22,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:43:22,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:43:22,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:43:22,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:43:22,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:43:22,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:43:22,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:43:22,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:43:22,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:43:22,036 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 21:43:22,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:43:22,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:43:22,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:43:22,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:43:22,535 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:43:22,536 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label46.c [2020-09-24 21:43:22,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c8bc5cad/5e7e043f77504558bdd1a10610268ffe/FLAG99b7b8598 [2020-09-24 21:43:23,278 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:43:23,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label46.c [2020-09-24 21:43:23,292 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c8bc5cad/5e7e043f77504558bdd1a10610268ffe/FLAG99b7b8598 [2020-09-24 21:43:23,512 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c8bc5cad/5e7e043f77504558bdd1a10610268ffe [2020-09-24 21:43:23,527 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:43:23,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:43:23,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:23,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:43:23,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:43:23,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:23" (1/1) ... [2020-09-24 21:43:23,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5783693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:23, skipping insertion in model container [2020-09-24 21:43:23,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:43:23" (1/1) ... [2020-09-24 21:43:23,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:43:23,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:24,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:24,089 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:24,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:24,355 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:24,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24 WrapperNode [2020-09-24 21:43:24,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:24,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:24,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:24,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:24,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (1/1) ... [2020-09-24 21:43:24,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:24,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:24,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:24,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:24,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (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 21:43:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:24,582 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:24,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:24,583 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:25,971 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:25,972 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:25,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:25 BoogieIcfgContainer [2020-09-24 21:43:25,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:25,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:25,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:25,987 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:25,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:43:23" (1/3) ... [2020-09-24 21:43:25,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786d3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:25, skipping insertion in model container [2020-09-24 21:43:25,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:24" (2/3) ... [2020-09-24 21:43:25,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786d3a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:25, skipping insertion in model container [2020-09-24 21:43:25,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:25" (3/3) ... [2020-09-24 21:43:25,993 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label46.c [2020-09-24 21:43:26,006 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:26,018 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:26,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:26,082 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:26,084 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:26,084 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:26,084 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:26,084 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:26,084 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:26,084 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:26,085 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 21:43:26,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:26,175 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] [2020-09-24 21:43:26,175 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -87322735, now seen corresponding path program 1 times [2020-09-24 21:43:26,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:26,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106040551] [2020-09-24 21:43:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:26,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:26,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:28,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:29,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:29,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:29,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:31,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:31,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-09-24 21:43:31,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:43:31,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-24 21:43:31,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:31,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:31,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:31,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:32,182 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:32,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:32,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:32,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:32,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:32,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:32,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 21:43:32,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:32,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:33,085 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 21:43:33,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106040551] [2020-09-24 21:43:33,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:33,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:33,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702912818] [2020-09-24 21:43:33,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:33,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:33,118 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:33,501 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 21:43:33,643 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-09-24 21:43:33,803 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:34,180 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 98 [2020-09-24 21:43:34,507 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 95 [2020-09-24 21:43:34,898 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:43:35,225 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-09-24 21:43:35,695 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 91 [2020-09-24 21:43:36,892 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:43:37,110 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-09-24 21:43:37,455 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 21:43:38,206 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-09-24 21:43:38,722 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-09-24 21:43:38,947 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 21:43:40,015 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-09-24 21:43:40,448 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-09-24 21:43:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:42,990 INFO L93 Difference]: Finished difference Result 1870 states and 2662 transitions. [2020-09-24 21:43:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:42,992 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 138 [2020-09-24 21:43:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:43,020 INFO L225 Difference]: With dead ends: 1870 [2020-09-24 21:43:43,020 INFO L226 Difference]: Without dead ends: 1241 [2020-09-24 21:43:43,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-09-24 21:43:43,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1076. [2020-09-24 21:43:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1294 transitions. [2020-09-24 21:43:43,163 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1294 transitions. Word has length 138 [2020-09-24 21:43:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:43,164 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1294 transitions. [2020-09-24 21:43:43,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1294 transitions. [2020-09-24 21:43:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 21:43:43,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:43,172 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] [2020-09-24 21:43:43,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:43,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2136798477, now seen corresponding path program 1 times [2020-09-24 21:43:43,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:43,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199262087] [2020-09-24 21:43:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:43,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:43,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:47,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:48,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:48,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 21:43:48,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:43:48,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:43:48,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:48,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:48,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:48,812 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:48,956 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-09-24 21:43:49,078 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-09-24 21:43:49,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:49,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:49,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:49,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:43:49,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:49,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:49,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:49,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:49,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:49,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:49,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:49,748 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 21:43:49,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199262087] [2020-09-24 21:43:49,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:49,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:49,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839169995] [2020-09-24 21:43:49,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:49,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:49,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:49,753 INFO L87 Difference]: Start difference. First operand 1076 states and 1294 transitions. Second operand 19 states. [2020-09-24 21:43:50,537 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:51,099 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-09-24 21:43:51,427 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-09-24 21:43:52,552 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:43:52,922 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-24 21:43:53,221 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-09-24 21:43:54,594 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-09-24 21:43:55,023 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-09-24 21:43:56,359 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-09-24 21:43:57,151 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-09-24 21:43:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:59,133 INFO L93 Difference]: Finished difference Result 4103 states and 5490 transitions. [2020-09-24 21:43:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:43:59,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 160 [2020-09-24 21:43:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:59,162 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:43:59,162 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:43:59,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:43:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:43:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:43:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:43:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3673 transitions. [2020-09-24 21:43:59,279 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3673 transitions. Word has length 160 [2020-09-24 21:43:59,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:59,280 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3673 transitions. [2020-09-24 21:43:59,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3673 transitions. [2020-09-24 21:43:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-09-24 21:43:59,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:59,291 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] [2020-09-24 21:43:59,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:59,291 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:59,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1055258910, now seen corresponding path program 1 times [2020-09-24 21:43:59,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:59,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680386548] [2020-09-24 21:43:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:59,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:59,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:00,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:01,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:03,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-24 21:44:04,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-24 21:44:04,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:44:04,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:44:04,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:44:04,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:44:04,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:04,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:44:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:44:04,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:44:04,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 21:44:04,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:44:04,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:44:04,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:04,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:44:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:44:04,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:04,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 21:44:04,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:44:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:44:04,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:44:04,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:44:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:04,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:04,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:44:04,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:44:04,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:44:04,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 21:44:04,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:44:04,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:44:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:44:04,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:44:04,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:44:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:44:05,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680386548] [2020-09-24 21:44:05,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:44:05,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:44:05,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881643686] [2020-09-24 21:44:05,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:44:05,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:44:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:44:05,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:44:05,064 INFO L87 Difference]: Start difference. First operand 3029 states and 3673 transitions. Second operand 13 states. [2020-09-24 21:44:05,895 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-09-24 21:44:06,354 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-09-24 21:44:08,209 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-24 21:44:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:44:11,453 INFO L93 Difference]: Finished difference Result 8675 states and 11482 transitions. [2020-09-24 21:44:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:44:11,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 173 [2020-09-24 21:44:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:44:11,482 INFO L225 Difference]: With dead ends: 8675 [2020-09-24 21:44:11,483 INFO L226 Difference]: Without dead ends: 5373 [2020-09-24 21:44:11,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:44:11,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2020-09-24 21:44:11,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 4725. [2020-09-24 21:44:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4725 states. [2020-09-24 21:44:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 5819 transitions. [2020-09-24 21:44:11,651 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 5819 transitions. Word has length 173 [2020-09-24 21:44:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:44:11,652 INFO L479 AbstractCegarLoop]: Abstraction has 4725 states and 5819 transitions. [2020-09-24 21:44:11,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:44:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 5819 transitions. [2020-09-24 21:44:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-24 21:44:11,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:44:11,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:44:11,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:44:11,670 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:44:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:44:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash -458078327, now seen corresponding path program 1 times [2020-09-24 21:44:11,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:44:11,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206286184] [2020-09-24 21:44:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:44:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:44:11,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:11,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:13,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:13,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:13,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:44:15,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking...