/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=BIGGEST --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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:33:59,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:33:59,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:33:59,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:33:59,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:33:59,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:33:59,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:33:59,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:33:59,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:33:59,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:33:59,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:33:59,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:33:59,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:33:59,522 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:33:59,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:33:59,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:33:59,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:33:59,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:33:59,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:33:59,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:33:59,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:33:59,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:33:59,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:33:59,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:33:59,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:33:59,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:33:59,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:33:59,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:33:59,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:33:59,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:33:59,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:33:59,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:33:59,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:33:59,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:33:59,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:33:59,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:33:59,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:33:59,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:33:59,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:33:59,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:33:59,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:33:59,568 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 20:33:59,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:33:59,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:33:59,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:33:59,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:33:59,609 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:33:59,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:33:59,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:33:59,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:33:59,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:33:59,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:33:59,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:33:59,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:33:59,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:33:59,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:33:59,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:33:59,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:33:59,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:33:59,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:33:59,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:33:59,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:33:59,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:33:59,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:33:59,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:33:59,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:33:59,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:33:59,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:33:59,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:33:59,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:33:59,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:33:59,614 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:34:00,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:34:00,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:34:00,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:34:00,085 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:34:00,085 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:34:00,086 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-09-24 20:34:00,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a5ffff77/8156e106edf14fec96c5078633ceb249/FLAGb6e3c40b5 [2020-09-24 20:34:00,762 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:34:00,763 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label25.c [2020-09-24 20:34:00,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a5ffff77/8156e106edf14fec96c5078633ceb249/FLAGb6e3c40b5 [2020-09-24 20:34:01,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a5ffff77/8156e106edf14fec96c5078633ceb249 [2020-09-24 20:34:01,016 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:34:01,023 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:34:01,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:34:01,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:34:01,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:34:01,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245d8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01, skipping insertion in model container [2020-09-24 20:34:01,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:34:01,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:34:01,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:34:01,639 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:34:01,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:34:01,873 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:34:01,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01 WrapperNode [2020-09-24 20:34:01,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:34:01,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:34:01,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:34:01,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:34:01,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (1/1) ... [2020-09-24 20:34:01,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:34:01,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:34:01,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:34:01,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:34:01,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (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 20:34:02,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:34:02,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:34:02,083 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 20:34:02,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:34:02,083 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 20:34:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:34:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 20:34:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 20:34:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:34:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:34:02,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:34:03,459 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:34:03,460 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:34:03,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:34:03 BoogieIcfgContainer [2020-09-24 20:34:03,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:34:03,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:34:03,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:34:03,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:34:03,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:34:01" (1/3) ... [2020-09-24 20:34:03,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80f973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:34:03, skipping insertion in model container [2020-09-24 20:34:03,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:34:01" (2/3) ... [2020-09-24 20:34:03,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80f973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:34:03, skipping insertion in model container [2020-09-24 20:34:03,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:34:03" (3/3) ... [2020-09-24 20:34:03,489 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label25.c [2020-09-24 20:34:03,501 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:34:03,515 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:34:03,538 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:34:03,572 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:34:03,572 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:34:03,572 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:34:03,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:34:03,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:34:03,573 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:34:03,573 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:34:03,573 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:34:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-24 20:34:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 20:34:03,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:34:03,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:34:03,649 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:34:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:34:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1730766665, now seen corresponding path program 1 times [2020-09-24 20:34:03,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:34:03,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652298201] [2020-09-24 20:34:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:34:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:04,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:04,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:04,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:04,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:05,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:08,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:08,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-09-24 20:34:08,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:34:08,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 20:34:08,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-24 20:34:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 20:34:08,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-09-24 20:34:08,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:34:09,506 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-09-24 20:34:10,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:34:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:10,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:10,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:10,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:34:10,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:34:10,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-09-24 20:34:10,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:34:10,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:34:10,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:34:10,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:34:10,590 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 20:34:10,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652298201] [2020-09-24 20:34:10,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:34:10,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-09-24 20:34:10,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578902870] [2020-09-24 20:34:10,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 20:34:10,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:34:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 20:34:10,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-24 20:34:10,623 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 21 states. [2020-09-24 20:34:11,413 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-09-24 20:34:11,668 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-09-24 20:34:11,949 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 20:34:12,396 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 20:34:12,907 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 20:34:13,284 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-09-24 20:34:13,532 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-09-24 20:34:13,843 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 20:34:14,065 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 20:34:14,293 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-09-24 20:34:14,577 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 20:34:15,170 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 20:34:15,684 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-24 20:34:16,251 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-24 20:34:16,729 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 20:34:17,018 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 20:34:17,444 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-09-24 20:34:17,689 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 20:34:18,747 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 20:34:19,357 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-24 20:34:20,084 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-09-24 20:34:20,880 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-09-24 20:34:21,281 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-09-24 20:34:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:34:22,650 INFO L93 Difference]: Finished difference Result 1741 states and 2475 transitions. [2020-09-24 20:34:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-24 20:34:22,652 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 160 [2020-09-24 20:34:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:34:22,679 INFO L225 Difference]: With dead ends: 1741 [2020-09-24 20:34:22,679 INFO L226 Difference]: Without dead ends: 1007 [2020-09-24 20:34:22,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1084, Invalid=2948, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 20:34:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2020-09-24 20:34:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 892. [2020-09-24 20:34:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2020-09-24 20:34:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1066 transitions. [2020-09-24 20:34:22,812 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1066 transitions. Word has length 160 [2020-09-24 20:34:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:34:22,813 INFO L479 AbstractCegarLoop]: Abstraction has 892 states and 1066 transitions. [2020-09-24 20:34:22,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 20:34:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1066 transitions. [2020-09-24 20:34:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-24 20:34:22,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:34:22,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:34:22,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:34:22,824 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:34:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:34:22,825 INFO L82 PathProgramCache]: Analyzing trace with hash 492784939, now seen corresponding path program 1 times [2020-09-24 20:34:22,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:34:22,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176457963] [2020-09-24 20:34:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:34:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:22,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:23,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:23,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:23,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:23,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:25,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:27,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:27,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-24 20:34:27,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 20:34:27,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-09-24 20:34:27,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:27,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 20:34:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 20:34:27,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-09-24 20:34:27,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:34:28,589 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-09-24 20:34:28,718 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-09-24 20:34:28,855 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-09-24 20:34:28,988 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-09-24 20:34:29,264 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-09-24 20:34:29,411 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-09-24 20:34:30,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:34:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:30,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:30,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:34:30,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:34:30,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 20:34:30,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:34:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:34:30,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:34:30,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:34:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 20:34:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:30,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:30,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 20:34:30,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:34:30,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-24 20:34:30,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:34:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:34:30,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 20:34:30,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:34:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:34:30,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176457963] [2020-09-24 20:34:30,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:34:30,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 20:34:30,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145896736] [2020-09-24 20:34:30,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 20:34:30,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:34:30,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 20:34:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-09-24 20:34:30,612 INFO L87 Difference]: Start difference. First operand 892 states and 1066 transitions. Second operand 27 states. [2020-09-24 20:34:31,876 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 20:34:32,145 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2020-09-24 20:34:32,406 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-24 20:34:32,810 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 20:34:33,149 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 20:34:33,709 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 20:34:33,951 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-09-24 20:34:34,563 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-09-24 20:34:34,794 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-09-24 20:34:35,132 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-09-24 20:34:35,531 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-09-24 20:34:35,776 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-09-24 20:34:36,172 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-09-24 20:34:36,678 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-24 20:34:36,970 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-09-24 20:34:37,253 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-09-24 20:34:37,521 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-09-24 20:34:37,703 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-24 20:34:37,997 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-09-24 20:34:38,140 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-09-24 20:34:38,397 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-09-24 20:34:38,707 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-09-24 20:34:39,005 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2020-09-24 20:34:39,354 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-09-24 20:34:39,655 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-09-24 20:34:39,958 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-09-24 20:34:40,594 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-09-24 20:34:40,825 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-09-24 20:34:41,102 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-09-24 20:34:41,497 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-09-24 20:34:41,796 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2020-09-24 20:34:42,228 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-09-24 20:34:42,540 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-09-24 20:34:42,815 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-09-24 20:34:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:34:43,618 INFO L93 Difference]: Finished difference Result 3055 states and 3915 transitions. [2020-09-24 20:34:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 20:34:43,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 182 [2020-09-24 20:34:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:34:43,632 INFO L225 Difference]: With dead ends: 3055 [2020-09-24 20:34:43,632 INFO L226 Difference]: Without dead ends: 2238 [2020-09-24 20:34:43,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1507, Invalid=3605, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 20:34:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2020-09-24 20:34:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1835. [2020-09-24 20:34:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1835 states. [2020-09-24 20:34:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2245 transitions. [2020-09-24 20:34:43,713 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2245 transitions. Word has length 182 [2020-09-24 20:34:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:34:43,714 INFO L479 AbstractCegarLoop]: Abstraction has 1835 states and 2245 transitions. [2020-09-24 20:34:43,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 20:34:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2245 transitions. [2020-09-24 20:34:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-09-24 20:34:43,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:34:43,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:34:43,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:34:43,723 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:34:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:34:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1894807830, now seen corresponding path program 1 times [2020-09-24 20:34:43,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:34:43,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228804043] [2020-09-24 20:34:43,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:34:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:43,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:43,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:43,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:44,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:45,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:45,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:48,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:48,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-24 20:34:48,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 20:34:48,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-09-24 20:34:48,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 20:34:48,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 20:34:48,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-09-24 20:34:48,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:34:49,443 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-09-24 20:34:49,625 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-09-24 20:34:49,768 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-09-24 20:34:49,925 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-09-24 20:34:50,087 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 33 [2020-09-24 20:34:50,388 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-09-24 20:34:50,541 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-09-24 20:34:50,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:34:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:50,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:50,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:50,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 20:34:50,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:34:50,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 20:34:50,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:34:50,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:34:50,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 20:34:50,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:34:51,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 20:34:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:51,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:51,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:51,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:51,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 20:34:51,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:34:51,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 20:34:51,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:51,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 20:34:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:34:51,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 20:34:51,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:34:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-24 20:34:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:34:51,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:34:51,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:34:51,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-24 20:34:51,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 20:34:51,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-09-24 20:34:51,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:34:51,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 20:34:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:34:51,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 20:34:51,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:34:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 20:34:51,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228804043] [2020-09-24 20:34:51,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 20:34:51,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 20:34:51,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986063054] [2020-09-24 20:34:51,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 20:34:51,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:34:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 20:34:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-24 20:34:51,550 INFO L87 Difference]: Start difference. First operand 1835 states and 2245 transitions. Second operand 25 states.