/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/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 20:01:54,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 20:01:54,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 20:01:54,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 20:01:54,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 20:01:54,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 20:01:54,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 20:01:54,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 20:01:54,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 20:01:54,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 20:01:54,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 20:01:54,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 20:01:54,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 20:01:54,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 20:01:54,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 20:01:54,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 20:01:54,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 20:01:54,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 20:01:54,840 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 20:01:54,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 20:01:54,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 20:01:54,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 20:01:54,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 20:01:54,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 20:01:54,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 20:01:54,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 20:01:54,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 20:01:54,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 20:01:54,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 20:01:54,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 20:01:54,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 20:01:54,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 20:01:54,881 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 20:01:54,882 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 20:01:54,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 20:01:54,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 20:01:54,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 20:01:54,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 20:01:54,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 20:01:54,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 20:01:54,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 20:01:54,890 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 20:01:54,950 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 20:01:54,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 20:01:54,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 20:01:54,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 20:01:54,956 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 20:01:54,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 20:01:54,957 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 20:01:54,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 20:01:54,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 20:01:54,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 20:01:54,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 20:01:54,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 20:01:54,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 20:01:54,959 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 20:01:54,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 20:01:54,960 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 20:01:54,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 20:01:54,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 20:01:54,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 20:01:54,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 20:01:54,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 20:01:54,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 20:01:54,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 20:01:54,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 20:01:54,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 20:01:54,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 20:01:54,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 20:01:54,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 20:01:54,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 20:01:54,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 20:01:55,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 20:01:55,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 20:01:55,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 20:01:55,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 20:01:55,455 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 20:01:55,456 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-10-28 20:01:55,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de247b30d/335fb17b23ad4910b0672138439f656a/FLAGcc5ad5ef0 [2020-10-28 20:01:56,166 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 20:01:56,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2020-10-28 20:01:56,176 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de247b30d/335fb17b23ad4910b0672138439f656a/FLAGcc5ad5ef0 [2020-10-28 20:01:56,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de247b30d/335fb17b23ad4910b0672138439f656a [2020-10-28 20:01:56,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 20:01:56,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 20:01:56,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 20:01:56,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 20:01:56,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 20:01:56,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d653f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56, skipping insertion in model container [2020-10-28 20:01:56,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 20:01:56,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 20:01:56,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 20:01:56,775 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 20:01:56,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 20:01:56,816 INFO L208 MainTranslator]: Completed translation [2020-10-28 20:01:56,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56 WrapperNode [2020-10-28 20:01:56,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 20:01:56,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 20:01:56,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 20:01:56,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 20:01:56,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (1/1) ... [2020-10-28 20:01:56,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 20:01:56,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 20:01:56,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 20:01:56,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 20:01:56,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (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 20:01:56,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 20:01:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 20:01:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 20:01:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 20:01:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 20:01:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-28 20:01:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 20:01:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-28 20:01:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 20:01:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 20:01:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 20:01:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 20:01:56,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 20:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 20:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 20:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-28 20:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 20:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 20:01:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 20:01:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 20:01:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 20:01:57,510 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 20:01:57,510 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 20:01:57,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:01:57 BoogieIcfgContainer [2020-10-28 20:01:57,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 20:01:57,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 20:01:57,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 20:01:57,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 20:01:57,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:01:56" (1/3) ... [2020-10-28 20:01:57,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f893f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:01:57, skipping insertion in model container [2020-10-28 20:01:57,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:01:56" (2/3) ... [2020-10-28 20:01:57,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f893f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:01:57, skipping insertion in model container [2020-10-28 20:01:57,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:01:57" (3/3) ... [2020-10-28 20:01:57,529 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-10-28 20:01:57,544 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 20:01:57,551 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 20:01:57,569 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 20:01:57,614 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 20:01:57,614 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 20:01:57,615 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 20:01:57,615 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 20:01:57,615 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 20:01:57,615 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 20:01:57,615 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 20:01:57,616 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 20:01:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-28 20:01:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 20:01:57,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:01:57,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 20:01:57,655 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:01:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:01:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2109147679, now seen corresponding path program 1 times [2020-10-28 20:01:57,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:01:57,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939703265] [2020-10-28 20:01:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:01:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:58,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:58,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:58,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 20:01:58,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 20:01:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 586 [2020-10-28 20:01:58,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:58,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 20:01:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:58,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 20:01:58,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:01:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:58,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:58,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:01:58,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 20:01:58,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:58,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:01:58,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:58,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 20:01:58,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 20:01:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:58,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:58,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:58,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:01:58,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 20:01:58,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:58,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 20:01:58,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:58,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:01:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 20:01:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:58,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:58,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:58,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:01:58,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:58,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 20:01:58,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:58,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:58,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 20:01:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:58,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:01:58,703 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 20:01:58,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939703265] [2020-10-28 20:01:58,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 20:01:58,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 20:01:58,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144086968] [2020-10-28 20:01:58,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 20:01:58,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:01:58,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 20:01:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 20:01:58,732 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-28 20:01:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:01:59,003 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-28 20:01:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 20:01:59,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 20:01:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:01:59,015 INFO L225 Difference]: With dead ends: 82 [2020-10-28 20:01:59,015 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 20:01:59,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 20:01:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 20:01:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 20:01:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 20:01:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-28 20:01:59,076 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2020-10-28 20:01:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:01:59,077 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-28 20:01:59,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 20:01:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-28 20:01:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 20:01:59,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:01:59,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 20:01:59,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 20:01:59,080 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:01:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:01:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 520799777, now seen corresponding path program 1 times [2020-10-28 20:01:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:01:59,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908995796] [2020-10-28 20:01:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:01:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:59,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:59,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:59,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 20:01:59,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:59,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-28 20:01:59,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:59,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:59,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 20:01:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 20:01:59,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 20:01:59,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:01:59,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:01:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:59,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:59,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:59,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:01:59,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:59,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 20:01:59,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:59,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:59,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:59,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:01:59,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:59,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:01:59,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 20:01:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:59,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:59,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:59,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:01:59,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:01:59,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:59,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:01:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:59,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:01:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 20:01:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:01:59,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:01:59,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:01:59,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:01:59,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:01:59,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:01:59,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:01:59,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:01:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:01:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:01:59,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:01:59,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:01:59,519 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 20:01:59,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908995796] [2020-10-28 20:01:59,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 20:01:59,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 20:01:59,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863617893] [2020-10-28 20:01:59,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 20:01:59,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:01:59,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 20:01:59,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 20:01:59,528 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2020-10-28 20:02:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:00,117 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-28 20:02:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 20:02:00,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-28 20:02:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:00,120 INFO L225 Difference]: With dead ends: 58 [2020-10-28 20:02:00,120 INFO L226 Difference]: Without dead ends: 52 [2020-10-28 20:02:00,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-28 20:02:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-28 20:02:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-28 20:02:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 20:02:00,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-28 20:02:00,140 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 25 [2020-10-28 20:02:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:00,140 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-28 20:02:00,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 20:02:00,141 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-28 20:02:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 20:02:00,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:00,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 20:02:00,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 20:02:00,144 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1305446031, now seen corresponding path program 1 times [2020-10-28 20:02:00,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:00,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1476157494] [2020-10-28 20:02:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:01,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:01,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 20:02:01,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 20:02:01,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 894 [2020-10-28 20:02:01,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:01,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:01,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 20:02:01,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 20:02:01,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 20:02:01,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:01,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:01,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:01,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:01,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:01,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:01,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:01,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:01,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:01,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:01,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:01,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:01,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:01,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 20:02:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:01,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:01,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:01,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:01,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:01,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:01,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:01,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:01,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:01,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:01,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:01,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:01,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 20:02:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:01,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:01,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:01,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:01,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:01,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:01,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:01,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:01,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:01,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:01,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 20:02:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:01,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:01,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:01,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:01,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:01,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 20:02:01,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:01,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:01,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:01,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 20:02:01,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1476157494] [2020-10-28 20:02:01,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 20:02:01,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 20:02:01,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798524962] [2020-10-28 20:02:01,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 20:02:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 20:02:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 20:02:01,276 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-10-28 20:02:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:02,264 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-10-28 20:02:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 20:02:02,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 20:02:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:02,270 INFO L225 Difference]: With dead ends: 85 [2020-10-28 20:02:02,270 INFO L226 Difference]: Without dead ends: 82 [2020-10-28 20:02:02,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-28 20:02:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-28 20:02:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-10-28 20:02:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 20:02:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-28 20:02:02,288 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 35 [2020-10-28 20:02:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:02,289 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-28 20:02:02,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 20:02:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-28 20:02:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 20:02:02,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 20:02:02,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 20:02:02,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 20:02:02,291 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 20:02:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 20:02:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1310958683, now seen corresponding path program 1 times [2020-10-28 20:02:02,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 20:02:02,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887705173] [2020-10-28 20:02:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 20:02:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:02,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:04,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:04,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 20:02:04,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 20:02:04,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2485 [2020-10-28 20:02:04,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:04,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 20:02:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 20:02:04,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 20:02:04,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:04,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 20:02:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:04,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:04,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:04,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:04,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:04,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 20:02:04,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:04,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:04,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:04,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:04,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:04,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 20:02:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:04,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:04,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:04,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:04,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 20:02:04,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:04,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:04,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 20:02:04,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:04,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 20:02:04,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 20:02:05,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 20:02:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:05,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:05,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:05,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 20:02:05,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:05,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 20:02:05,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:05,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 20:02:05,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:05,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:05,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 20:02:05,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 20:02:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:05,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:05,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:05,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:05,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:05,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:05,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:05,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:05,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:05,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:05,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 20:02:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:05,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:05,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:05,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:05,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:05,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:05,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:05,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:05,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:05,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 20:02:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 20:02:05,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 20:02:05,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 20:02:05,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 20:02:05,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 20:02:05,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 20:02:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 20:02:05,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887705173] [2020-10-28 20:02:05,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 20:02:05,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 20:02:05,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82353943] [2020-10-28 20:02:05,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 20:02:05,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 20:02:05,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 20:02:05,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 20:02:05,100 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 12 states. [2020-10-28 20:02:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 20:02:05,871 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2020-10-28 20:02:05,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 20:02:05,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-28 20:02:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 20:02:05,873 INFO L225 Difference]: With dead ends: 58 [2020-10-28 20:02:05,874 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 20:02:05,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2020-10-28 20:02:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 20:02:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 20:02:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 20:02:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 20:02:05,876 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-10-28 20:02:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 20:02:05,876 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 20:02:05,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 20:02:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 20:02:05,877 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 20:02:05,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 20:02:05,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 20:02:06,405 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-28 20:02:06,616 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-28 20:02:06,833 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-28 20:02:07,050 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2020-10-28 20:02:07,053 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2020-10-28 20:02:07,054 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 5) the Hoare annotation is: true [2020-10-28 20:02:07,054 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2020-10-28 20:02:07,054 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-28 20:02:07,054 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 20:02:07,056 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#t~string6.offset)| |#t~string6.offset|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |#t~string7.offset| |old(#t~string7.offset)|) (= |old(#t~string7.base)| |#t~string7.base|) (= |old(#valid)| |#valid|)) [2020-10-28 20:02:07,056 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 20:02:07,056 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 20:02:07,056 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 20:02:07,056 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 20:02:07,056 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 20:02:07,057 INFO L277 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2020-10-28 20:02:07,057 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-28 20:02:07,057 INFO L274 CegarLoopResult]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2020-10-28 20:02:07,057 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2020-10-28 20:02:07,057 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= (select |#memory_int| main_~a~0.base) .cse0) (= .cse0 (select |#memory_int| |main_#t~malloc17.base|)))) [2020-10-28 20:02:07,057 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 41 50) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-10-28 20:02:07,057 INFO L270 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-28 20:02:07,058 INFO L274 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-10-28 20:02:07,058 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 41 50) no Hoare annotation was computed. [2020-10-28 20:02:07,058 INFO L270 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-10-28 20:02:07,058 INFO L274 CegarLoopResult]: For program point L45-1(line 45) no Hoare annotation was computed. [2020-10-28 20:02:07,059 INFO L274 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-10-28 20:02:07,059 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 41 50) no Hoare annotation was computed. [2020-10-28 20:02:07,060 INFO L270 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (let ((.cse5 ((as const (Array Int Int)) 0))) (let ((.cse0 (<= (+ check_~y 1) check_~n)) (.cse2 (= (select |#memory_int| check_~a.base) .cse5)) (.cse1 (<= 1 check_~x)) (.cse3 (not (<= (+ |check_#in~y| 1) |check_#in~n|))) (.cse4 (not (= (select |#memory_int| |check_#in~a.base|) .cse5)))) (and (or (and (or (and .cse0 .cse1) (and .cse0 (= check_~x 0))) .cse2) .cse3 (not (= |check_#in~x| 0)) .cse4) (or (and .cse0 .cse2 .cse1) .cse3 (not (<= 1 |check_#in~x|)) .cse4)))) [2020-10-28 20:02:07,060 INFO L274 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-10-28 20:02:07,060 INFO L277 CegarLoopResult]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2020-10-28 20:02:07,060 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-28 20:02:07,060 INFO L274 CegarLoopResult]: For program point L25(lines 25 26) no Hoare annotation was computed. [2020-10-28 20:02:07,061 INFO L270 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse5 ((as const (Array Int Int)) 0))) (let ((.cse0 (<= (+ check_~y 1) check_~n)) (.cse2 (= (select |#memory_int| check_~a.base) .cse5)) (.cse1 (<= 1 check_~x)) (.cse3 (not (<= (+ |check_#in~y| 1) |check_#in~n|))) (.cse4 (not (= (select |#memory_int| |check_#in~a.base|) .cse5)))) (and (or (and (or (and .cse0 .cse1) (and .cse0 (= check_~x 0))) .cse2) .cse3 (not (= |check_#in~x| 0)) .cse4) (or (and .cse0 .cse2 .cse1) .cse3 (not (<= 1 |check_#in~x|)) .cse4)))) [2020-10-28 20:02:07,061 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse3 ((as const (Array Int Int)) 0))) (let ((.cse2 (= (select |#memory_int| check_~a.base) .cse3)) (.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|))) (.cse1 (not (= (select |#memory_int| |check_#in~a.base|) .cse3)))) (and (or .cse0 (not (= |check_#in~x| 0)) .cse1 (and (< check_~y check_~n) .cse2 (= check_~x 0))) (or (and (<= (+ check_~y 1) check_~n) .cse2 (<= 1 check_~x)) .cse0 (not (<= 1 |check_#in~x|)) .cse1)))) [2020-10-28 20:02:07,062 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-10-28 20:02:07,062 INFO L274 CegarLoopResult]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2020-10-28 20:02:07,062 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-28 20:02:07,062 INFO L274 CegarLoopResult]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2020-10-28 20:02:07,062 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (let ((.cse2 ((as const (Array Int Int)) 0)) (.cse1 (= |check_#in~x| 0))) (or (let ((.cse0 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse0 (not .cse1)) (or .cse0 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse2)) (and (<= check_~ai~0 check_~ax~0) (= (select |#memory_int| check_~a.base) .cse2) (let ((.cse3 (<= (+ check_~y 1) check_~n))) (or (and .cse3 (<= 1 check_~x)) (and .cse1 .cse3 (= check_~x 0))))))) [2020-10-28 20:02:07,062 INFO L274 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-10-28 20:02:07,062 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 10 12) the Hoare annotation is: true [2020-10-28 20:02:07,063 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-28 20:02:07,063 INFO L270 CegarLoopResult]: At program point L11-1(line 11) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 20:02:07,063 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 10 12) no Hoare annotation was computed. [2020-10-28 20:02:07,063 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-10-28 20:02:07,063 INFO L274 CegarLoopResult]: For program point L11-4(lines 10 12) no Hoare annotation was computed. [2020-10-28 20:02:07,063 INFO L270 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2020-10-28 20:02:07,063 INFO L274 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-10-28 20:02:07,063 INFO L274 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-10-28 20:02:07,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:02:07 BoogieIcfgContainer [2020-10-28 20:02:07,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 20:02:07,074 INFO L168 Benchmark]: Toolchain (without parser) took 10541.19 ms. Allocated memory was 125.8 MB in the beginning and 218.1 MB in the end (delta: 92.3 MB). Free memory was 101.0 MB in the beginning and 94.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 120.4 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:07,076 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 84.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 20:02:07,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.52 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:07,081 INFO L168 Benchmark]: Boogie Preprocessor took 44.59 ms. Allocated memory is still 125.8 MB. Free memory was 90.4 MB in the beginning and 88.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:07,087 INFO L168 Benchmark]: RCFGBuilder took 649.91 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 88.8 MB in the beginning and 133.5 MB in the end (delta: -44.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:07,088 INFO L168 Benchmark]: TraceAbstraction took 9553.23 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 133.0 MB in the beginning and 94.2 MB in the end (delta: 38.8 MB). Peak memory consumption was 125.8 MB. Max. memory is 8.0 GB. [2020-10-28 20:02:07,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 125.8 MB. Free memory is still 84.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.52 ms. Allocated memory is still 125.8 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.59 ms. Allocated memory is still 125.8 MB. Free memory was 90.4 MB in the beginning and 88.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 649.91 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 88.8 MB in the beginning and 133.5 MB in the end (delta: -44.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9553.23 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 133.0 MB in the beginning and 94.2 MB in the end (delta: 38.8 MB). Peak memory consumption was 125.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 287 SDslu, 188 SDs, 0 SdLazy, 765 SolverSat, 235 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=3, 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, 4 MinimizatonAttempts, 26 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 54 PreInvPairs, 65 NumberOfFragments, 363 HoareAnnotationTreeSize, 54 FomulaSimplifications, 741 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 17 FomulaSimplificationsInter, 1118 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 14572 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 8/13 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...