/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/sum01_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 10:00:54,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 10:00:54,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 10:00:54,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 10:00:54,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 10:00:54,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 10:00:54,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 10:00:54,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 10:00:54,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 10:00:54,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 10:00:54,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 10:00:54,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 10:00:54,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 10:00:54,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 10:00:54,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 10:00:54,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 10:00:54,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 10:00:54,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 10:00:54,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 10:00:54,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 10:00:54,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 10:00:54,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 10:00:54,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 10:00:54,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 10:00:54,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 10:00:54,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 10:00:54,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 10:00:54,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 10:00:54,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 10:00:54,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 10:00:54,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 10:00:54,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 10:00:54,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 10:00:54,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 10:00:54,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 10:00:54,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 10:00:54,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 10:00:54,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 10:00:54,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 10:00:54,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 10:00:54,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 10:00:54,896 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 [2020-10-29 10:00:54,946 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 10:00:54,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 10:00:54,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 10:00:54,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 10:00:54,952 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 10:00:54,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 10:00:54,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 10:00:54,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 10:00:54,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 10:00:54,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 10:00:54,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 10:00:54,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 10:00:54,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 10:00:54,955 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 10:00:54,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 10:00:54,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 10:00:54,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 10:00:54,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 10:00:54,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 10:00:54,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 10:00:54,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 10:00:54,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 10:00:54,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 10:00:54,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 10:00:54,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 10:00:54,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 10:00:54,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 10:00:54,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 10:00:54,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 10:00:54,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 10:00:55,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 10:00:55,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 10:00:55,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 10:00:55,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 10:00:55,451 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 10:00:55,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-29 10:00:55,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e61e4f498/b37d67e0f95b4ca59f1f5f2a0a548607/FLAGfae2a64f5 [2020-10-29 10:00:56,092 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 10:00:56,093 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum01_bug02.i [2020-10-29 10:00:56,100 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e61e4f498/b37d67e0f95b4ca59f1f5f2a0a548607/FLAGfae2a64f5 [2020-10-29 10:00:56,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e61e4f498/b37d67e0f95b4ca59f1f5f2a0a548607 [2020-10-29 10:00:56,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 10:00:56,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 10:00:56,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 10:00:56,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 10:00:56,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 10:00:56,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2ecc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56, skipping insertion in model container [2020-10-29 10:00:56,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 10:00:56,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 10:00:56,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:00:56,780 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 10:00:56,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 10:00:56,820 INFO L208 MainTranslator]: Completed translation [2020-10-29 10:00:56,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56 WrapperNode [2020-10-29 10:00:56,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 10:00:56,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 10:00:56,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 10:00:56,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 10:00:56,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (1/1) ... [2020-10-29 10:00:56,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 10:00:56,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 10:00:56,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 10:00:56,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 10:00:56,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (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 [2020-10-29 10:00:56,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 10:00:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 10:00:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 10:00:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 10:00:56,939 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 10:00:56,939 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 10:00:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 10:00:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 10:00:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 10:00:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 10:00:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 10:00:56,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 10:00:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-29 10:00:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 10:00:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 10:00:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 10:00:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 10:00:56,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 10:00:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 10:00:56,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 10:00:57,299 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 10:00:57,299 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 10:00:57,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:00:57 BoogieIcfgContainer [2020-10-29 10:00:57,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 10:00:57,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 10:00:57,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 10:00:57,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 10:00:57,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 10:00:56" (1/3) ... [2020-10-29 10:00:57,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750690da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:00:57, skipping insertion in model container [2020-10-29 10:00:57,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 10:00:56" (2/3) ... [2020-10-29 10:00:57,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@750690da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 10:00:57, skipping insertion in model container [2020-10-29 10:00:57,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 10:00:57" (3/3) ... [2020-10-29 10:00:57,311 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-10-29 10:00:57,327 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 10:00:57,332 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 10:00:57,349 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 10:00:57,409 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 10:00:57,409 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 10:00:57,409 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 10:00:57,410 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 10:00:57,410 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 10:00:57,410 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 10:00:57,410 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 10:00:57,410 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 10:00:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-29 10:00:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 10:00:57,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:57,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:57,436 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash 734717802, now seen corresponding path program 1 times [2020-10-29 10:00:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:57,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288418053] [2020-10-29 10:00:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:57,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:58,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:58,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 10:00:58,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 10:00:58,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-29 10:00:58,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:58,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:00:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 10:00:58,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 10:00:58,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:58,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:58,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:58,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:58,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 10:00:58,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:58,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:58,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:58,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:58,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288418053] [2020-10-29 10:00:58,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 10:00:58,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 10:00:58,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280289203] [2020-10-29 10:00:58,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:00:58,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:00:58,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:00:58,277 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-29 10:00:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:58,552 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-10-29 10:00:58,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 10:00:58,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-29 10:00:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:58,562 INFO L225 Difference]: With dead ends: 50 [2020-10-29 10:00:58,562 INFO L226 Difference]: Without dead ends: 21 [2020-10-29 10:00:58,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:00:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-29 10:00:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-29 10:00:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 10:00:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-29 10:00:58,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2020-10-29 10:00:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:58,607 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-29 10:00:58,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:00:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-29 10:00:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 10:00:58,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:58,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:58,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 10:00:58,609 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:58,610 INFO L82 PathProgramCache]: Analyzing trace with hash -569959400, now seen corresponding path program 1 times [2020-10-29 10:00:58,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:58,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878089331] [2020-10-29 10:00:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:58,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:58,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:58,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 10:00:58,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:58,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-29 10:00:58,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:58,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:00:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:58,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 10:00:58,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:59,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:00:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:59,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:59,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:59,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:00:59,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 10:00:59,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:59,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:00:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:00:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:00:59,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:00:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:00:59,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878089331] [2020-10-29 10:00:59,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:00:59,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:00:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172604681] [2020-10-29 10:00:59,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:00:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:00:59,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:00:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:00:59,159 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-10-29 10:00:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:00:59,518 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-29 10:00:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:00:59,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-29 10:00:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:00:59,521 INFO L225 Difference]: With dead ends: 38 [2020-10-29 10:00:59,521 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 10:00:59,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-29 10:00:59,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 10:00:59,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-29 10:00:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-29 10:00:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-29 10:00:59,532 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-10-29 10:00:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:00:59,533 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-29 10:00:59,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:00:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-29 10:00:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 10:00:59,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:00:59,534 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:00:59,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 10:00:59,534 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:00:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:00:59,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2009440877, now seen corresponding path program 2 times [2020-10-29 10:00:59,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:00:59,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955634955] [2020-10-29 10:00:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:00:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:00:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:00:59,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:00:59,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 10:00:59,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:00:59,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-29 10:00:59,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:00:59,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:00:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:00:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:00:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 10:00:59,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:00,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:00,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:00,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:00,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:00,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:00,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 10:01:00,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:00,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:00,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:00,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:00,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:00,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 10:01:00,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955634955] [2020-10-29 10:01:00,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:00,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 10:01:00,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554934292] [2020-10-29 10:01:00,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 10:01:00,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 10:01:00,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-29 10:01:00,029 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 11 states. [2020-10-29 10:01:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:00,440 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-29 10:01:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:01:00,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-29 10:01:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:00,442 INFO L225 Difference]: With dead ends: 41 [2020-10-29 10:01:00,442 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 10:01:00,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-29 10:01:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 10:01:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-10-29 10:01:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 10:01:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-29 10:01:00,451 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-10-29 10:01:00,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:00,451 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-29 10:01:00,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 10:01:00,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-29 10:01:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 10:01:00,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:00,453 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:00,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 10:01:00,453 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1892499409, now seen corresponding path program 1 times [2020-10-29 10:01:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:00,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081331237] [2020-10-29 10:01:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:00,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:00,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:00,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 10:01:00,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:00,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-29 10:01:00,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:00,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 10:01:00,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:00,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 10:01:00,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:00,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:00,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:00,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:00,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:00,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:00,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:00,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:00,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:00,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:00,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:00,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:00,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081331237] [2020-10-29 10:01:00,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:00,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 10:01:00,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359942346] [2020-10-29 10:01:00,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 10:01:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 10:01:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 10:01:00,609 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-29 10:01:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:00,738 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-29 10:01:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 10:01:00,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 10:01:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:00,740 INFO L225 Difference]: With dead ends: 43 [2020-10-29 10:01:00,740 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 10:01:00,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 10:01:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 10:01:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-29 10:01:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-29 10:01:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-29 10:01:00,747 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-10-29 10:01:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:00,748 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-29 10:01:00,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 10:01:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-29 10:01:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-29 10:01:00,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:00,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:00,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 10:01:00,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1681738700, now seen corresponding path program 2 times [2020-10-29 10:01:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:00,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390033033] [2020-10-29 10:01:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:00,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:00,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 10:01:00,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:00,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 10:01:00,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:00,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 10:01:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:00,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 10:01:00,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:00,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:00,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:00,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:00,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:00,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:00,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:00,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:00,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:00,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:00,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:00,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:00,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390033033] [2020-10-29 10:01:00,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:00,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 10:01:00,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078732279] [2020-10-29 10:01:00,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 10:01:00,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:00,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 10:01:00,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 10:01:00,931 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-10-29 10:01:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:01,128 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-29 10:01:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 10:01:01,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-29 10:01:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:01,130 INFO L225 Difference]: With dead ends: 43 [2020-10-29 10:01:01,130 INFO L226 Difference]: Without dead ends: 32 [2020-10-29 10:01:01,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-29 10:01:01,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-29 10:01:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-29 10:01:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 10:01:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-29 10:01:01,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2020-10-29 10:01:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:01,138 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-29 10:01:01,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 10:01:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-29 10:01:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 10:01:01,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:01,140 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:01,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 10:01:01,140 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -931077561, now seen corresponding path program 3 times [2020-10-29 10:01:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:01,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899754776] [2020-10-29 10:01:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:01,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:01,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:01,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 10:01:01,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:01,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-29 10:01:01,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:01,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:01,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 10:01:01,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:01,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 10:01:01,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:01,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:01,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:01,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:01,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:01,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 10:01:01,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:01,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:01,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:01,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:01,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:01,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899754776] [2020-10-29 10:01:01,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:01,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 10:01:01,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752604038] [2020-10-29 10:01:01,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 10:01:01,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:01,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 10:01:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 10:01:01,417 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2020-10-29 10:01:01,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:01,730 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-29 10:01:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 10:01:01,731 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-29 10:01:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:01,732 INFO L225 Difference]: With dead ends: 47 [2020-10-29 10:01:01,732 INFO L226 Difference]: Without dead ends: 36 [2020-10-29 10:01:01,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-29 10:01:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-29 10:01:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-29 10:01:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-29 10:01:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-29 10:01:01,740 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 29 [2020-10-29 10:01:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:01,741 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-29 10:01:01,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 10:01:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-29 10:01:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 10:01:01,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:01,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:01,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 10:01:01,742 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:01,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:01,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1680948414, now seen corresponding path program 4 times [2020-10-29 10:01:01,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:01,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096391786] [2020-10-29 10:01:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:01,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:01,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:01,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 10:01:01,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:01,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-29 10:01:01,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:01,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 10:01:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 10:01:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 10:01:01,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 10:01:02,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 10:01:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 10:01:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 10:01:02,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 10:01:02,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 10:01:02,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 10:01:02,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 10:01:02,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 10:01:02,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 10:01:02,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 10:01:02,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 10:01:02,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 10:01:02,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 10:01:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 10:01:02,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096391786] [2020-10-29 10:01:02,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 10:01:02,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 10:01:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3564610] [2020-10-29 10:01:02,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 10:01:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 10:01:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 10:01:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 10:01:02,127 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-29 10:01:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 10:01:02,587 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-29 10:01:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 10:01:02,588 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-29 10:01:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 10:01:02,589 INFO L225 Difference]: With dead ends: 51 [2020-10-29 10:01:02,589 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 10:01:02,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-29 10:01:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 10:01:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-29 10:01:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 10:01:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-29 10:01:02,598 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2020-10-29 10:01:02,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 10:01:02,598 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-29 10:01:02,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 10:01:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-29 10:01:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 10:01:02,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 10:01:02,600 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 10:01:02,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 10:01:02,600 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 10:01:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 10:01:02,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1660792509, now seen corresponding path program 5 times [2020-10-29 10:01:02,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 10:01:02,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693865508] [2020-10-29 10:01:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 10:01:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 10:01:02,620 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 10:01:02,620 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 10:01:02,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 10:01:02,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 10:01:02 BoogieIcfgContainer [2020-10-29 10:01:02,641 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 10:01:02,644 INFO L168 Benchmark]: Toolchain (without parser) took 6144.92 ms. Allocated memory was 157.3 MB in the beginning and 252.7 MB in the end (delta: 95.4 MB). Free memory was 132.2 MB in the beginning and 172.2 MB in the end (delta: -39.9 MB). Peak memory consumption was 56.3 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:02,645 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 157.3 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 10:01:02,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.60 ms. Allocated memory is still 157.3 MB. Free memory was 131.8 MB in the beginning and 122.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:02,646 INFO L168 Benchmark]: Boogie Preprocessor took 34.36 ms. Allocated memory is still 157.3 MB. Free memory was 122.5 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:02,647 INFO L168 Benchmark]: RCFGBuilder took 441.40 ms. Allocated memory is still 157.3 MB. Free memory was 120.9 MB in the beginning and 107.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:02,648 INFO L168 Benchmark]: TraceAbstraction took 5338.37 ms. Allocated memory was 157.3 MB in the beginning and 252.7 MB in the end (delta: 95.4 MB). Free memory was 107.4 MB in the beginning and 172.2 MB in the end (delta: -64.7 MB). Peak memory consumption was 31.1 MB. Max. memory is 8.0 GB. [2020-10-29 10:01:02,651 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 157.3 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 313.60 ms. Allocated memory is still 157.3 MB. Free memory was 131.8 MB in the beginning and 122.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.36 ms. Allocated memory is still 157.3 MB. Free memory was 122.5 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 441.40 ms. Allocated memory is still 157.3 MB. Free memory was 120.9 MB in the beginning and 107.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5338.37 ms. Allocated memory was 157.3 MB in the beginning and 252.7 MB in the end (delta: 95.4 MB). Free memory was 107.4 MB in the beginning and 172.2 MB in the end (delta: -64.7 MB). Peak memory consumption was 31.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i