/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:53:52,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:53:52,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:53:52,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:53:52,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:53:52,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:53:52,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:53:52,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:53:52,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:53:52,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:53:52,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:53:52,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:53:52,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:53:52,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:53:52,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:53:52,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:53:52,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:53:52,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:53:52,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:53:52,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:53:52,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:53:52,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:53:52,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:53:52,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:53:52,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:53:52,703 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:53:52,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:53:52,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:53:52,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:53:52,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:53:52,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:53:52,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:53:52,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:53:52,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:53:52,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:53:52,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:53:52,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:53:52,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:53:52,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:53:52,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:53:52,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:53:52,723 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 [2020-10-28 14:53:52,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:53:52,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:53:52,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:53:52,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:53:52,781 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:53:52,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:53:52,781 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:53:52,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:53:52,782 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:53:52,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:53:52,783 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:53:52,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:53:52,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:53:52,784 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:53:52,784 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:53:52,785 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:53:52,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:53:52,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:53:52,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:53:52,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:53:52,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:53:52,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:53:52,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:53:52,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:53:52,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:53:52,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:53:52,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:53:52,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:53:52,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:53:52,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:53:53,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:53:53,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:53:53,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:53:53,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:53:53,205 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:53:53,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-28 14:53:53,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e383640c5/ed99066c09cf47aaa62dc3cc91da0147/FLAG5691cb95e [2020-10-28 14:53:53,939 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:53:53,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-10-28 14:53:53,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e383640c5/ed99066c09cf47aaa62dc3cc91da0147/FLAG5691cb95e [2020-10-28 14:53:54,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e383640c5/ed99066c09cf47aaa62dc3cc91da0147 [2020-10-28 14:53:54,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:53:54,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:53:54,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:54,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:53:54,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:53:54,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735c9605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54, skipping insertion in model container [2020-10-28 14:53:54,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:53:54,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:53:54,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:54,541 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:53:54,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:53:54,595 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:53:54,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54 WrapperNode [2020-10-28 14:53:54,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:53:54,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:53:54,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:53:54,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:53:54,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (1/1) ... [2020-10-28 14:53:54,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:53:54,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:53:54,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:53:54,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:53:54,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (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 [2020-10-28 14:53:54,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:53:54,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:53:54,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:53:54,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:53:54,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:53:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:53:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:53:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:53:54,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:53:54,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:53:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:53:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:53:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:53:54,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:53:54,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:53:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:53:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:53:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:53:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:53:54,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:53:55,314 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:53:55,314 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-28 14:53:55,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:55 BoogieIcfgContainer [2020-10-28 14:53:55,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:53:55,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:53:55,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:53:55,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:53:55,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:53:54" (1/3) ... [2020-10-28 14:53:55,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bcc377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:55, skipping insertion in model container [2020-10-28 14:53:55,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:53:54" (2/3) ... [2020-10-28 14:53:55,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37bcc377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:53:55, skipping insertion in model container [2020-10-28 14:53:55,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:53:55" (3/3) ... [2020-10-28 14:53:55,364 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-10-28 14:53:55,402 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:53:55,410 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:53:55,424 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:53:55,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:53:55,453 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:53:55,453 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:53:55,453 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:53:55,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:53:55,454 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:53:55,454 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:53:55,454 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:53:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 14:53:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:53:55,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:55,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:55,480 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash 174536931, now seen corresponding path program 1 times [2020-10-28 14:53:55,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:55,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805633918] [2020-10-28 14:53:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:55,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:56,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:56,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 14:53:56,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:56,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-28 14:53:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:56,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:56,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:53:56,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:56,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 14:53:56,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:56,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:56,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:56,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:56,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:56,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:53:56,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:56,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:56,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:56,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:56,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:56,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805633918] [2020-10-28 14:53:56,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:56,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:53:56,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241658202] [2020-10-28 14:53:56,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:53:56,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:56,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:53:56,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:53:56,231 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-28 14:53:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:56,322 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-10-28 14:53:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:53:56,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-28 14:53:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:56,332 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:53:56,332 INFO L226 Difference]: Without dead ends: 20 [2020-10-28 14:53:56,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:53:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-28 14:53:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-28 14:53:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 14:53:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-28 14:53:56,376 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2020-10-28 14:53:56,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:56,377 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-28 14:53:56,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:53:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-28 14:53:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:53:56,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:56,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:56,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:53:56,379 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1346698167, now seen corresponding path program 1 times [2020-10-28 14:53:56,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:56,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665573929] [2020-10-28 14:53:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:56,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:56,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:56,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:56,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 14:53:56,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:56,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-28 14:53:56,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:56,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:53:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:53:56,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:56,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:56,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:56,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:56,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:56,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:56,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:56,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:56,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:56,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:56,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:53:56,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665573929] [2020-10-28 14:53:56,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:56,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:53:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473406423] [2020-10-28 14:53:56,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:53:56,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:53:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:56,723 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2020-10-28 14:53:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:56,803 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-28 14:53:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:53:56,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:53:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:56,806 INFO L225 Difference]: With dead ends: 39 [2020-10-28 14:53:56,807 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 14:53:56,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:53:56,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 14:53:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-28 14:53:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:53:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-28 14:53:56,817 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-28 14:53:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:56,818 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-28 14:53:56,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:53:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-28 14:53:56,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:53:56,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:56,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:56,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:53:56,819 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:56,820 INFO L82 PathProgramCache]: Analyzing trace with hash 261615961, now seen corresponding path program 1 times [2020-10-28 14:53:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:56,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3884499] [2020-10-28 14:53:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:56,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:56,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 14:53:57,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:53:57,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-28 14:53:57,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:53:57,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 14:53:57,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:53:57,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:57,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:57,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:57,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:57,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,250 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:57,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:57,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:57,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:53:57,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3884499] [2020-10-28 14:53:57,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:53:57,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:53:57,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026778581] [2020-10-28 14:53:57,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:53:57,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:53:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:53:57,259 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-10-28 14:53:57,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:57,411 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-28 14:53:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:53:57,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-28 14:53:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:57,413 INFO L225 Difference]: With dead ends: 31 [2020-10-28 14:53:57,413 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 14:53:57,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:53:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 14:53:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-28 14:53:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-28 14:53:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-28 14:53:57,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-10-28 14:53:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:57,421 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-28 14:53:57,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:53:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-28 14:53:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:53:57,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:57,422 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:57,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:53:57,423 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:57,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1489759200, now seen corresponding path program 1 times [2020-10-28 14:53:57,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:57,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735637013] [2020-10-28 14:53:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:53:57,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-28 14:53:57,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:53:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:53:57,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:53:57,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:57,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:57,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:57,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:57,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:57,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:57,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:57,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:57,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:57,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:57,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:57,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:57,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:53:57,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735637013] [2020-10-28 14:53:57,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:57,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:53:57,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562115526] [2020-10-28 14:53:57,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:53:57,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:53:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:57,919 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-28 14:53:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:58,049 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-28 14:53:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:53:58,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-28 14:53:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:58,051 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:53:58,051 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:53:58,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:53:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:53:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-28 14:53:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:53:58,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-28 14:53:58,059 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-10-28 14:53:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:58,060 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-28 14:53:58,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:53:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-28 14:53:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:53:58,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:58,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:58,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:53:58,061 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash -244529086, now seen corresponding path program 2 times [2020-10-28 14:53:58,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:58,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071925062] [2020-10-28 14:53:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:58,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:58,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:53:58,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:53:58,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-28 14:53:58,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:58,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:53:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:58,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:53:58,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:58,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:58,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:58,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:58,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:53:58,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:58,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:58,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:58,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:58,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:53:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:53:58,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071925062] [2020-10-28 14:53:58,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:58,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:53:58,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795390650] [2020-10-28 14:53:58,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:53:58,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:58,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:53:58,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:53:58,623 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2020-10-28 14:53:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:58,776 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-28 14:53:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:53:58,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-28 14:53:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:58,778 INFO L225 Difference]: With dead ends: 37 [2020-10-28 14:53:58,778 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 14:53:58,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:53:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 14:53:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 14:53:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:53:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-28 14:53:58,785 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-10-28 14:53:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:58,785 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-28 14:53:58,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:53:58,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-28 14:53:58,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 14:53:58,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:58,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:58,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:53:58,787 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:58,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:58,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1400983177, now seen corresponding path program 3 times [2020-10-28 14:53:58,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:58,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845853626] [2020-10-28 14:53:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:58,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:59,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:53:59,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:53:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-28 14:53:59,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:59,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:53:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:53:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:53:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:59,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:53:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:59,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:53:59,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:53:59,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:53:59,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:53:59,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:53:59,600 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:53:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:53:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:53:59,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:53:59,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:53:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:53:59,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845853626] [2020-10-28 14:53:59,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:53:59,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:53:59,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638865353] [2020-10-28 14:53:59,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:53:59,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:53:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:53:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:53:59,608 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-28 14:53:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:53:59,803 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-10-28 14:53:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:53:59,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-28 14:53:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:53:59,805 INFO L225 Difference]: With dead ends: 60 [2020-10-28 14:53:59,805 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 14:53:59,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:53:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 14:53:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-28 14:53:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 14:53:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-28 14:53:59,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2020-10-28 14:53:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:53:59,814 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-28 14:53:59,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:53:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-28 14:53:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:53:59,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:53:59,823 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:53:59,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:53:59,824 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:53:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:53:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1746062066, now seen corresponding path program 4 times [2020-10-28 14:53:59,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:53:59,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384584604] [2020-10-28 14:53:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:53:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:53:59,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:53:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:00,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:00,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:54:00,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:54:00,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1154 [2020-10-28 14:54:00,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:00,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:00,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:54:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:54:01,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:54:01,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:01,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:01,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:01,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:01,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:01,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:01,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:01,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:01,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:01,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:01,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:54:01,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384584604] [2020-10-28 14:54:01,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:01,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:54:01,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588965682] [2020-10-28 14:54:01,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:54:01,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:01,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:54:01,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:54:01,220 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2020-10-28 14:54:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:01,430 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2020-10-28 14:54:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:54:01,430 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-28 14:54:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:01,431 INFO L225 Difference]: With dead ends: 70 [2020-10-28 14:54:01,431 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 14:54:01,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:54:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 14:54:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-28 14:54:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 14:54:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-28 14:54:01,439 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2020-10-28 14:54:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:01,439 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-28 14:54:01,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:54:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-28 14:54:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:54:01,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:01,441 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:01,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:54:01,441 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash 770091355, now seen corresponding path program 5 times [2020-10-28 14:54:01,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:01,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779685357] [2020-10-28 14:54:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:01,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:01,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:02,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:02,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:54:02,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:54:02,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1541 [2020-10-28 14:54:02,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:02,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:02,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:54:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:54:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:54:02,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:03,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:03,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:03,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:03,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:54:03,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:03,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:03,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:03,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:54:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 14:54:03,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779685357] [2020-10-28 14:54:03,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:03,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:54:03,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871286640] [2020-10-28 14:54:03,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:54:03,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:54:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:54:03,124 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 10 states. [2020-10-28 14:54:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:03,329 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-28 14:54:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:54:03,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 14:54:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:03,331 INFO L225 Difference]: With dead ends: 80 [2020-10-28 14:54:03,331 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 14:54:03,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:54:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 14:54:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-28 14:54:03,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:54:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-28 14:54:03,343 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2020-10-28 14:54:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:03,345 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-28 14:54:03,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:54:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-28 14:54:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:54:03,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:54:03,348 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:54:03,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:54:03,349 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:54:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:54:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash 437455300, now seen corresponding path program 6 times [2020-10-28 14:54:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:54:03,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006911580] [2020-10-28 14:54:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:54:03,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:03,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:03,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:05,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:54:05,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:54:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2007 [2020-10-28 14:54:05,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:05,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:54:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 14:54:05,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:54:05,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:54:05,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:54:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:54:05,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:54:05,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:54:05,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:54:05,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:54:05,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:54:05,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:54:05,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:54:05,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:54:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:54:05,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:54:05,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:54:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-28 14:54:05,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006911580] [2020-10-28 14:54:05,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:54:05,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:54:05,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325552885] [2020-10-28 14:54:05,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:54:05,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:54:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:54:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:54:05,488 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 8 states. [2020-10-28 14:54:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:54:05,632 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-28 14:54:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:54:05,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-28 14:54:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:54:05,633 INFO L225 Difference]: With dead ends: 48 [2020-10-28 14:54:05,633 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:54:05,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:54:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:54:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:54:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:54:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:54:05,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-10-28 14:54:05,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:54:05,635 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:54:05,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:54:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:54:05,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:54:05,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:54:05,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:54:05,785 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 14:54:05,785 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 14:54:05,785 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 14:54:05,785 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 14:54:05,785 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 14:54:05,786 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:54:05,786 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 14:54:05,786 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:54:05,786 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:54:05,786 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:54:05,786 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:54:05,786 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:54:05,787 INFO L274 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-10-28 14:54:05,787 INFO L274 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-10-28 14:54:05,787 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 20 34) no Hoare annotation was computed. [2020-10-28 14:54:05,787 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 20 34) no Hoare annotation was computed. [2020-10-28 14:54:05,787 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 20 34) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-28 14:54:05,801 INFO L274 CegarLoopResult]: For program point L28-1(lines 28 32) no Hoare annotation was computed. [2020-10-28 14:54:05,802 INFO L274 CegarLoopResult]: For program point L28-3(lines 28 32) no Hoare annotation was computed. [2020-10-28 14:54:05,802 INFO L270 CegarLoopResult]: At program point L28-4(lines 28 32) the Hoare annotation is: (<= main_~i~0 1023) [2020-10-28 14:54:05,802 INFO L270 CegarLoopResult]: At program point L28-5(lines 28 32) the Hoare annotation is: (<= main_~i~0 1024) [2020-10-28 14:54:05,802 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-28 14:54:05,802 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (<= main_~i~0 1024) [2020-10-28 14:54:05,802 INFO L274 CegarLoopResult]: For program point L24-4(lines 24 26) no Hoare annotation was computed. [2020-10-28 14:54:05,802 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 14:54:05,803 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-10-28 14:54:05,803 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-28 14:54:05,803 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2020-10-28 14:54:05,803 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2020-10-28 14:54:05,803 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2020-10-28 14:54:05,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:54:05 BoogieIcfgContainer [2020-10-28 14:54:05,833 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:54:05,836 INFO L168 Benchmark]: Toolchain (without parser) took 11528.37 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 125.9 MB in the beginning and 243.0 MB in the end (delta: -117.1 MB). Peak memory consumption was 145.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:54:05,837 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:54:05,838 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.37 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:54:05,839 INFO L168 Benchmark]: Boogie Preprocessor took 70.85 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:54:05,839 INFO L168 Benchmark]: RCFGBuilder took 647.72 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 100.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:54:05,841 INFO L168 Benchmark]: TraceAbstraction took 10512.27 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 99.7 MB in the beginning and 243.0 MB in the end (delta: -143.3 MB). Peak memory consumption was 119.3 MB. Max. memory is 8.0 GB. [2020-10-28 14:54:05,844 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.37 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 115.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.85 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 113.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 647.72 ms. Allocated memory is still 151.0 MB. Free memory was 113.9 MB in the beginning and 100.1 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10512.27 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 99.7 MB in the beginning and 243.0 MB in the end (delta: -143.3 MB). Peak memory consumption was 119.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: i <= 1024 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.1s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 117 SDslu, 287 SDs, 0 SdLazy, 522 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 40 PreInvPairs, 56 NumberOfFragments, 48 HoareAnnotationTreeSize, 40 FomulaSimplifications, 76 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 116 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 243 NumberOfCodeBlocks, 243 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 18064 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 108/172 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...