/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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:14:54,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:14:54,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:14:54,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:14:54,877 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:14:54,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:14:54,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:14:54,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:14:54,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:14:54,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:14:54,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:14:54,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:14:54,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:14:54,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:14:54,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:14:54,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:14:54,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:14:54,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:14:54,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:14:54,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:14:54,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:14:54,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:14:54,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:14:54,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:14:54,957 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:14:54,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:14:54,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:14:54,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:14:54,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:14:54,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:14:54,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:14:54,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:14:54,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:14:54,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:14:54,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:14:54,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:14:54,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:14:54,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:14:54,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:14:54,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:14:54,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:14:54,986 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 15:14:55,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:14:55,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:14:55,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:14:55,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:14:55,046 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:14:55,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:14:55,046 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:14:55,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:14:55,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:14:55,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:14:55,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:14:55,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:14:55,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:14:55,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:14:55,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:14:55,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:14:55,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:14:55,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:14:55,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:14:55,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:14:55,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:14:55,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:14:55,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:14:55,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:14:55,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:14:55,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:14:55,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:14:55,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:14:55,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:14:55,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:14:55,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:14:55,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:14:55,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:14:55,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:14:55,469 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:14:55,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-10-28 15:14:55,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cd76029b/6295b1ef221d4d398304bcca579a3eb8/FLAGf0a877b51 [2020-10-28 15:14:56,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:14:56,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-10-28 15:14:56,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cd76029b/6295b1ef221d4d398304bcca579a3eb8/FLAGf0a877b51 [2020-10-28 15:14:56,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7cd76029b/6295b1ef221d4d398304bcca579a3eb8 [2020-10-28 15:14:56,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:14:56,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:14:56,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:14:56,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:14:56,562 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:14:56,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1219ad88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56, skipping insertion in model container [2020-10-28 15:14:56,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,576 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:14:56,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:14:56,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:14:56,777 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:14:56,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:14:56,811 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:14:56,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56 WrapperNode [2020-10-28 15:14:56,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:14:56,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:14:56,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:14:56,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:14:56,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (1/1) ... [2020-10-28 15:14:56,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:14:56,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:14:56,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:14:56,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:14:56,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (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 15:14:56,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:14:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:14:56,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:14:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:14:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:14:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:14:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:14:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:14:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:14:56,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:14:56,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:14:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:14:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:14:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:14:56,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:14:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:14:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:14:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:14:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:14:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:14:57,402 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:14:57,403 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:14:57,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:14:57 BoogieIcfgContainer [2020-10-28 15:14:57,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:14:57,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:14:57,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:14:57,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:14:57,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:14:56" (1/3) ... [2020-10-28 15:14:57,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5673dd7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:14:57, skipping insertion in model container [2020-10-28 15:14:57,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:14:56" (2/3) ... [2020-10-28 15:14:57,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5673dd7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:14:57, skipping insertion in model container [2020-10-28 15:14:57,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:14:57" (3/3) ... [2020-10-28 15:14:57,430 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-10-28 15:14:57,443 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:14:57,448 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:14:57,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:14:57,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:14:57,494 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:14:57,494 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:14:57,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:14:57,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:14:57,494 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:14:57,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:14:57,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:14:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-28 15:14:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:14:57,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:57,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:57,523 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2024755940, now seen corresponding path program 1 times [2020-10-28 15:14:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:57,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045371703] [2020-10-28 15:14:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:57,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:57,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:58,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:58,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:14:58,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:58,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-28 15:14:58,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:58,130 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:14:58,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:58,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:14:58,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:58,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:58,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:58,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:58,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 15:14:58,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:58,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:58,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:58,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:58,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:58,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:58,348 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 15:14:58,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045371703] [2020-10-28 15:14:58,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:14:58,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:14:58,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348149668] [2020-10-28 15:14:58,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:14:58,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:58,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:14:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:14:58,388 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-28 15:14:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:58,497 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2020-10-28 15:14:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:14:58,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:14:58,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:58,509 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:14:58,509 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:14:58,513 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 15:14:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:14:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 15:14:58,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:14:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-28 15:14:58,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-28 15:14:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:58,567 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-28 15:14:58,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:14:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-28 15:14:58,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:14:58,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:58,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:58,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:14:58,570 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:58,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1898032393, now seen corresponding path program 1 times [2020-10-28 15:14:58,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:58,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626125522] [2020-10-28 15:14:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:58,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:58,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:58,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:58,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:14:58,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:14:58,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-28 15:14:58,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:58,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:14:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:14:58,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:14:58,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:58,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:58,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:58,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:58,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:58,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:58,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:14:58,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:58,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:58,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:58,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:58,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:58,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:58,880 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 15:14:58,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626125522] [2020-10-28 15:14:58,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:14:58,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:14:58,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493671274] [2020-10-28 15:14:58,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:14:58,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:14:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:14:58,885 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-10-28 15:14:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:59,089 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-28 15:14:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:14:59,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:14:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:59,091 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:14:59,091 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:14:59,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 15:14:59,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:14:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:14:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:14:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-28 15:14:59,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2020-10-28 15:14:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:59,103 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-28 15:14:59,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:14:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-28 15:14:59,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:14:59,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:59,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:59,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:14:59,105 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1951596611, now seen corresponding path program 1 times [2020-10-28 15:14:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:59,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843332376] [2020-10-28 15:14:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:59,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:59,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:14:59,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:59,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-28 15:14:59,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:59,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:59,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:14:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:14:59,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:14:59,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:59,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:14:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:59,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:14:59,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:14:59,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:14:59,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:14:59,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:14:59,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:14:59,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:14:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:14:59,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:14:59,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:14:59,359 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 15:14:59,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843332376] [2020-10-28 15:14:59,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:14:59,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 15:14:59,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952792201] [2020-10-28 15:14:59,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:14:59,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:14:59,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:14:59,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:14:59,362 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2020-10-28 15:14:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:14:59,770 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-10-28 15:14:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:14:59,771 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-28 15:14:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:14:59,772 INFO L225 Difference]: With dead ends: 31 [2020-10-28 15:14:59,772 INFO L226 Difference]: Without dead ends: 28 [2020-10-28 15:14:59,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:14:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-28 15:14:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-28 15:14:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:14:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 15:14:59,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2020-10-28 15:14:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:14:59,784 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 15:14:59,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:14:59,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 15:14:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:14:59,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:14:59,786 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:14:59,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:14:59,786 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:14:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:14:59,787 INFO L82 PathProgramCache]: Analyzing trace with hash -549680435, now seen corresponding path program 1 times [2020-10-28 15:14:59,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:14:59,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160890256] [2020-10-28 15:14:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:14:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:14:59,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:14:59,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:00,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:15:00,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:15:00,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-28 15:15:00,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:00,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:00,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:15:00,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:15:00,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:15:00,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:00,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:15:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:00,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:00,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:15:00,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:15:00,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:15:00,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:00,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:00,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:15:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:00,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:15:00,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:00,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 15:15:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:15:00,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:15:00,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:15:00,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 15:15:00,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:15:00,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:15:00,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:15:00,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:15:00,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:15:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:15:00,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:15:00,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:15:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:15:00,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160890256] [2020-10-28 15:15:00,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:15:00,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 15:15:00,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712166629] [2020-10-28 15:15:00,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:15:00,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:15:00,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:15:00,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:15:00,383 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 8 states. [2020-10-28 15:15:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:15:00,823 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-28 15:15:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:15:00,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-28 15:15:00,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:15:00,825 INFO L225 Difference]: With dead ends: 35 [2020-10-28 15:15:00,825 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:15:00,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:15:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:15:00,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-28 15:15:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:15:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-28 15:15:00,835 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 20 [2020-10-28 15:15:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:15:00,835 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-28 15:15:00,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:15:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-28 15:15:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:15:00,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:15:00,837 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:15:00,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:15:00,837 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:15:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:15:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1572252782, now seen corresponding path program 1 times [2020-10-28 15:15:00,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:15:00,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868950222] [2020-10-28 15:15:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:15:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 15:15:00,853 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 15:15:00,853 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 15:15:00,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:15:00,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:15:00 BoogieIcfgContainer [2020-10-28 15:15:00,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:15:00,877 INFO L168 Benchmark]: Toolchain (without parser) took 4324.04 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 126.5 MB in the beginning and 148.6 MB in the end (delta: -22.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:15:00,878 INFO L168 Benchmark]: CDTParser took 0.59 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: 118.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:15:00,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.66 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:15:00,880 INFO L168 Benchmark]: Boogie Preprocessor took 40.31 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:15:00,881 INFO L168 Benchmark]: RCFGBuilder took 549.86 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 101.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:15:00,881 INFO L168 Benchmark]: TraceAbstraction took 3467.50 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 101.0 MB in the beginning and 148.6 MB in the end (delta: -47.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:15:00,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 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: 118.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.66 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.31 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 549.86 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 101.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3467.50 ms. Allocated memory was 151.0 MB in the beginning and 184.5 MB in the end (delta: 33.6 MB). Free memory was 101.0 MB in the beginning and 148.6 MB in the end (delta: -47.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 [L22] COND TRUE i