/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_label41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:42:57,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:42:57,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:42:57,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:42:57,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:42:57,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:42:57,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:42:57,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:42:57,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:42:57,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:42:57,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:42:57,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:42:57,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:42:57,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:42:57,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:42:57,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:42:57,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:42:57,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:42:57,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:42:57,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:42:57,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:42:57,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:42:57,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:42:57,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:42:57,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:42:57,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:42:57,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:42:57,960 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:42:57,960 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:42:57,961 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:42:57,961 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:42:57,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:42:57,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:42:57,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:42:57,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:42:57,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:42:57,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:42:57,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:42:57,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:42:57,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:42:57,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:42:57,970 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 21:42:57,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:42:57,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:42:57,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:42:57,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:42:57,999 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:42:57,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:42:57,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:42:58,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:42:58,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:42:58,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:42:58,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:42:58,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:42:58,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:42:58,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:42:58,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:42:58,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:42:58,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:42:58,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:42:58,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:42:58,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:42:58,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:42:58,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:42:58,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:42:58,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:42:58,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:42:58,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:42:58,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:42:58,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:42:58,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:42:58,004 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 21:42:58,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:42:58,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:42:58,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:42:58,530 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:42:58,531 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:42:58,532 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2020-09-24 21:42:58,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bff287fc/70bc2683b8b44acf80992b6a59b1c9b7/FLAGc52bc141a [2020-09-24 21:42:59,239 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:42:59,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label41.c [2020-09-24 21:42:59,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bff287fc/70bc2683b8b44acf80992b6a59b1c9b7/FLAGc52bc141a [2020-09-24 21:42:59,471 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3bff287fc/70bc2683b8b44acf80992b6a59b1c9b7 [2020-09-24 21:42:59,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:42:59,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:42:59,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:42:59,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:42:59,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:42:59,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:59" (1/1) ... [2020-09-24 21:42:59,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66409f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:42:59, skipping insertion in model container [2020-09-24 21:42:59,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:42:59" (1/1) ... [2020-09-24 21:42:59,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:42:59,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:43:00,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:00,176 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:43:00,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:43:00,413 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:43:00,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00 WrapperNode [2020-09-24 21:43:00,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:43:00,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:43:00,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:43:00,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:43:00,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (1/1) ... [2020-09-24 21:43:00,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:43:00,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:43:00,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:43:00,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:43:00,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (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 21:43:00,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:43:00,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:43:00,613 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:43:00,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:43:00,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:43:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:43:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:43:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:43:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:43:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:43:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:43:01,984 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:43:01,985 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:43:01,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:01 BoogieIcfgContainer [2020-09-24 21:43:01,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:43:01,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:43:01,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:43:02,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:43:02,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:42:59" (1/3) ... [2020-09-24 21:43:02,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333f2b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:02, skipping insertion in model container [2020-09-24 21:43:02,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:43:00" (2/3) ... [2020-09-24 21:43:02,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333f2b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:43:02, skipping insertion in model container [2020-09-24 21:43:02,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:43:01" (3/3) ... [2020-09-24 21:43:02,008 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label41.c [2020-09-24 21:43:02,021 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:43:02,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:43:02,056 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:43:02,095 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:43:02,095 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:43:02,095 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:43:02,095 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:43:02,095 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:43:02,096 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:43:02,096 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:43:02,096 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:43:02,131 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 21:43:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 21:43:02,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:02,159 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] [2020-09-24 21:43:02,160 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:02,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1858793511, now seen corresponding path program 1 times [2020-09-24 21:43:02,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:02,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268021424] [2020-09-24 21:43:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:02,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:02,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:03,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:05,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:05,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:06,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:07,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:07,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-24 21:43:07,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:43:07,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-09-24 21:43:07,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:43:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 21:43:07,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:43:07,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:43:07,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:07,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:08,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:08,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:08,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:08,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-09-24 21:43:08,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:08,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:08,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:08,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:08,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:08,389 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 21:43:08,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268021424] [2020-09-24 21:43:08,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:43:08,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-24 21:43:08,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306552579] [2020-09-24 21:43:08,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:43:08,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:08,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:43:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:43:08,428 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 16 states. [2020-09-24 21:43:09,213 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2020-09-24 21:43:09,453 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2020-09-24 21:43:09,995 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-09-24 21:43:10,366 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-09-24 21:43:11,493 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-09-24 21:43:11,699 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-09-24 21:43:12,003 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 21:43:12,754 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-09-24 21:43:13,227 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-09-24 21:43:13,402 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-24 21:43:14,192 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-09-24 21:43:14,581 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-09-24 21:43:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:16,982 INFO L93 Difference]: Finished difference Result 1869 states and 2661 transitions. [2020-09-24 21:43:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 21:43:16,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 116 [2020-09-24 21:43:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:17,022 INFO L225 Difference]: With dead ends: 1869 [2020-09-24 21:43:17,023 INFO L226 Difference]: Without dead ends: 1239 [2020-09-24 21:43:17,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:43:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2020-09-24 21:43:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1076. [2020-09-24 21:43:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1076 states. [2020-09-24 21:43:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1293 transitions. [2020-09-24 21:43:17,198 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1293 transitions. Word has length 116 [2020-09-24 21:43:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:17,200 INFO L479 AbstractCegarLoop]: Abstraction has 1076 states and 1293 transitions. [2020-09-24 21:43:17,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:43:17,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1293 transitions. [2020-09-24 21:43:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-09-24 21:43:17,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:17,212 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] [2020-09-24 21:43:17,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:43:17,212 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:17,213 INFO L82 PathProgramCache]: Analyzing trace with hash 336019643, now seen corresponding path program 1 times [2020-09-24 21:43:17,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:17,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056562585] [2020-09-24 21:43:17,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:17,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:18,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:19,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:20,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:22,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:22,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-09-24 21:43:22,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:43:22,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-24 21:43:22,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:43:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:43:22,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 21:43:22,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:22,843 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-09-24 21:43:22,965 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-09-24 21:43:23,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:23,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:23,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:23,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:23,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 21:43:23,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:43:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:23,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:23,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:23,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:23,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:23,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:23,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 21:43:23,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:23,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 21:43:23,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:43:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:23,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:43:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:43:23,712 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 21:43:23,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056562585] [2020-09-24 21:43:23,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:23,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:43:23,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317094777] [2020-09-24 21:43:23,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:43:23,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:23,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:43:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:43:23,717 INFO L87 Difference]: Start difference. First operand 1076 states and 1293 transitions. Second operand 19 states. [2020-09-24 21:43:24,550 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-24 21:43:25,060 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 97 [2020-09-24 21:43:25,360 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2020-09-24 21:43:26,745 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-09-24 21:43:27,101 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-09-24 21:43:28,422 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-09-24 21:43:28,823 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-09-24 21:43:30,168 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-09-24 21:43:30,911 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-09-24 21:43:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:32,719 INFO L93 Difference]: Finished difference Result 4103 states and 5484 transitions. [2020-09-24 21:43:32,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 21:43:32,720 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 138 [2020-09-24 21:43:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:32,749 INFO L225 Difference]: With dead ends: 4103 [2020-09-24 21:43:32,749 INFO L226 Difference]: Without dead ends: 3107 [2020-09-24 21:43:32,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=593, Invalid=1477, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 21:43:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2020-09-24 21:43:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3029. [2020-09-24 21:43:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3029 states. [2020-09-24 21:43:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 3672 transitions. [2020-09-24 21:43:32,913 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 3672 transitions. Word has length 138 [2020-09-24 21:43:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:32,915 INFO L479 AbstractCegarLoop]: Abstraction has 3029 states and 3672 transitions. [2020-09-24 21:43:32,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:43:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 3672 transitions. [2020-09-24 21:43:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-24 21:43:32,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:32,934 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] [2020-09-24 21:43:32,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:43:32,935 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:32,936 INFO L82 PathProgramCache]: Analyzing trace with hash 649535782, now seen corresponding path program 1 times [2020-09-24 21:43:32,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:32,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365929902] [2020-09-24 21:43:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:33,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:35,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:36,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:37,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:37,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:37,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:37,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-09-24 21:43:37,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:43:37,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 21:43:37,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:37,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:43:37,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:43:38,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:43:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:38,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:38,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:43:38,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:43:38,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 21:43:38,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:38,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:43:38,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:43:38,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:43:38,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 21:43:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:38,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:38,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:43:38,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:38,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:43:38,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:38,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:43:38,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:38,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:43:38,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:43:38,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 21:43:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:38,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:38,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:38,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 21:43:38,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:43:38,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-24 21:43:38,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:43:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:43:38,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 21:43:38,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 21:43:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-24 21:43:38,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365929902] [2020-09-24 21:43:38,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:43:38,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:43:38,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673142042] [2020-09-24 21:43:38,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:43:38,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:43:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:43:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:43:38,987 INFO L87 Difference]: Start difference. First operand 3029 states and 3672 transitions. Second operand 12 states. [2020-09-24 21:43:39,925 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-09-24 21:43:40,423 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-09-24 21:43:42,379 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-09-24 21:43:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:43:45,622 INFO L93 Difference]: Finished difference Result 8675 states and 11475 transitions. [2020-09-24 21:43:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:43:45,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-09-24 21:43:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:43:45,653 INFO L225 Difference]: With dead ends: 8675 [2020-09-24 21:43:45,654 INFO L226 Difference]: Without dead ends: 5373 [2020-09-24 21:43:45,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:43:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2020-09-24 21:43:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 4725. [2020-09-24 21:43:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4725 states. [2020-09-24 21:43:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 5816 transitions. [2020-09-24 21:43:45,841 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 5816 transitions. Word has length 151 [2020-09-24 21:43:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:43:45,842 INFO L479 AbstractCegarLoop]: Abstraction has 4725 states and 5816 transitions. [2020-09-24 21:43:45,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:43:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 5816 transitions. [2020-09-24 21:43:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 21:43:45,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:43:45,858 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, 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] [2020-09-24 21:43:45,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:43:45,858 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:43:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:43:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash 155721396, now seen corresponding path program 1 times [2020-09-24 21:43:45,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:43:45,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131077857] [2020-09-24 21:43:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:43:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:43:45,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:43:50,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:43:50,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-09-24 21:43:50,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:43:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4195 [2020-09-24 21:43:50,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:43:50,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 21:43:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:43:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-09-24 21:43:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1