/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/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:18:00,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:18:00,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:18:00,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:18:00,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:18:00,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:18:00,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:18:00,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:18:00,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:18:00,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:18:00,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:18:00,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:18:00,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:18:00,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:18:00,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:18:00,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:18:00,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:18:00,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:18:00,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:18:00,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:18:00,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:18:00,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:18:00,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:18:00,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:18:00,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:18:00,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:18:00,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:18:00,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:18:00,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:18:00,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:18:00,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:18:00,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:18:00,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:18:00,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:18:00,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:18:00,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:18:00,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:18:00,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:18:00,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:18:00,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:18:00,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:18:00,994 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 15:18:01,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:18:01,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:18:01,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:18:01,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:18:01,035 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:18:01,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:18:01,035 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:18:01,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:18:01,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:18:01,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:18:01,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:18:01,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:18:01,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:18:01,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:18:01,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:18:01,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:18:01,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:18:01,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:18:01,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:18:01,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:18:01,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:18:01,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:18:01,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:18:01,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:18:01,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:18:01,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:18:01,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:18:01,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:18:01,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:18:01,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:18:01,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:18:01,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:18:01,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:18:01,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:18:01,587 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:18:01,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-10-28 15:18:01,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/115d90382/8777665f28e84f71807d934a4fb9dbb5/FLAG71c14b35b [2020-10-28 15:18:02,405 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:18:02,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c [2020-10-28 15:18:02,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/115d90382/8777665f28e84f71807d934a4fb9dbb5/FLAG71c14b35b [2020-10-28 15:18:02,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/115d90382/8777665f28e84f71807d934a4fb9dbb5 [2020-10-28 15:18:02,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:18:02,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:18:02,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:18:02,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:18:02,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:18:02,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:18:02" (1/1) ... [2020-10-28 15:18:02,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@847d14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:02, skipping insertion in model container [2020-10-28 15:18:02,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:18:02" (1/1) ... [2020-10-28 15:18:02,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:18:02,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:18:02,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:18:03,006 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:18:03,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:18:03,042 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:18:03,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03 WrapperNode [2020-10-28 15:18:03,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:18:03,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:18:03,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:18:03,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:18:03,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (1/1) ... [2020-10-28 15:18:03,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:18:03,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:18:03,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:18:03,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:18:03,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (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 15:18:03,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:18:03,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:18:03,164 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:18:03,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:18:03,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:18:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:18:03,164 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:18:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:18:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:18:03,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:18:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 15:18:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:18:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:18:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:18:03,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:18:03,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:18:03,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:18:03,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:18:03,450 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:18:03,451 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:18:03,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:18:03 BoogieIcfgContainer [2020-10-28 15:18:03,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:18:03,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:18:03,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:18:03,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:18:03,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:18:02" (1/3) ... [2020-10-28 15:18:03,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f2c4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:18:03, skipping insertion in model container [2020-10-28 15:18:03,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:18:03" (2/3) ... [2020-10-28 15:18:03,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f2c4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:18:03, skipping insertion in model container [2020-10-28 15:18:03,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:18:03" (3/3) ... [2020-10-28 15:18:03,465 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-10-28 15:18:03,509 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:18:03,515 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:18:03,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:18:03,563 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:18:03,563 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:18:03,563 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:18:03,563 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:18:03,564 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:18:03,564 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:18:03,564 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:18:03,564 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:18:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-28 15:18:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:18:03,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:03,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:03,592 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1553397026, now seen corresponding path program 1 times [2020-10-28 15:18:03,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:03,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587036296] [2020-10-28 15:18:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:03,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:04,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:04,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:18:04,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:18:04,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-10-28 15:18:04,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:04,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:04,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:18:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:18:04,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:04,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:04,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:04,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:04,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:04,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:18:04,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:04,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:04,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:04,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:04,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:04,380 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 15:18:04,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587036296] [2020-10-28 15:18:04,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:04,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:18:04,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333332785] [2020-10-28 15:18:04,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:18:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:18:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:18:04,411 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-28 15:18:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:04,490 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-28 15:18:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:18:04,492 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:18:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:04,501 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:18:04,501 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 15:18:04,505 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 15:18:04,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 15:18:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 15:18:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 15:18:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-28 15:18:04,554 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-28 15:18:04,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:04,555 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-28 15:18:04,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:18:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-28 15:18:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:18:04,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:04,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:04,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:18:04,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:04,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1868317687, now seen corresponding path program 1 times [2020-10-28 15:18:04,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:04,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151407180] [2020-10-28 15:18:04,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:04,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:04,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:18:04,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:04,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-28 15:18:04,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:04,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:18:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:04,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:18:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:04,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:04,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:04,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:04,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:04,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:18:04,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:04,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:04,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:04,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:04,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:04,862 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 15:18:04,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151407180] [2020-10-28 15:18:04,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:18:04,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:18:04,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595284165] [2020-10-28 15:18:04,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:18:04,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:04,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:18:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:18:04,874 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-10-28 15:18:05,026 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-28 15:18:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:05,245 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-28 15:18:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:18:05,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-28 15:18:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:05,247 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:18:05,247 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:18:05,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:18:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:18:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-28 15:18:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:18:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-28 15:18:05,258 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2020-10-28 15:18:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:05,258 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-28 15:18:05,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:18:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-28 15:18:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 15:18:05,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:05,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:05,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:18:05,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1031623051, now seen corresponding path program 1 times [2020-10-28 15:18:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:05,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658598968] [2020-10-28 15:18:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:05,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 15:18:05,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-28 15:18:05,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:18:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:05,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 15:18:05,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:05,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:05,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:05,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:05,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:05,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 15:18:05,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:05,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:05,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:05,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:05,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658598968] [2020-10-28 15:18:05,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:05,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:18:05,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062660333] [2020-10-28 15:18:05,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:18:05,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:05,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:18:05,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:18:05,701 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-10-28 15:18:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:06,114 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-10-28 15:18:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:18:06,115 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-28 15:18:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:06,116 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:18:06,116 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:18:06,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:18:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:18:06,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-28 15:18:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-28 15:18:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-28 15:18:06,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-10-28 15:18:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:06,124 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-28 15:18:06,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:18:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-28 15:18:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:18:06,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:06,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:06,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:18:06,126 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:06,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:06,126 INFO L82 PathProgramCache]: Analyzing trace with hash -101010231, now seen corresponding path program 2 times [2020-10-28 15:18:06,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:06,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068507109] [2020-10-28 15:18:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:06,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:06,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:06,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:18:06,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:06,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-28 15:18:06,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:06,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:18:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:18:06,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:18:06,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:06,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:06,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:06,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:06,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:06,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:06,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 15:18:06,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:06,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:06,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:06,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:06,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:06,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068507109] [2020-10-28 15:18:06,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:06,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:18:06,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504664051] [2020-10-28 15:18:06,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:18:06,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:18:06,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:18:06,575 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-10-28 15:18:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:07,039 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-10-28 15:18:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:18:07,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-28 15:18:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:07,040 INFO L225 Difference]: With dead ends: 39 [2020-10-28 15:18:07,040 INFO L226 Difference]: Without dead ends: 24 [2020-10-28 15:18:07,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:18:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-28 15:18:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-28 15:18:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:18:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-28 15:18:07,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2020-10-28 15:18:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:07,049 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-28 15:18:07,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:18:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-28 15:18:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:18:07,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:07,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:07,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:18:07,051 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:07,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:07,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1116036917, now seen corresponding path program 3 times [2020-10-28 15:18:07,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:07,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820210963] [2020-10-28 15:18:07,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:07,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:07,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:18:07,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:07,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-28 15:18:07,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:07,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:07,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:18:07,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:07,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 15:18:07,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:07,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:07,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:07,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:07,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:07,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:18:07,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:07,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:07,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:07,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:07,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:07,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820210963] [2020-10-28 15:18:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:18:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546270215] [2020-10-28 15:18:07,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:18:07,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:18:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:18:07,507 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-28 15:18:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:07,919 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-28 15:18:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:18:07,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-28 15:18:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:07,923 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:18:07,924 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:18:07,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:18:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:18:07,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-28 15:18:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:18:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-28 15:18:07,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-10-28 15:18:07,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:07,932 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-28 15:18:07,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:18:07,933 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-28 15:18:07,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:18:07,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:07,934 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:07,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:18:07,934 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1088691593, now seen corresponding path program 4 times [2020-10-28 15:18:07,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:07,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774238933] [2020-10-28 15:18:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:07,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:08,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:08,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:18:08,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 15:18:08,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:08,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:18:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:18:08,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:08,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:08,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:08,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:08,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:08,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:08,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:18:08,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:08,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:08,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:18:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:08,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774238933] [2020-10-28 15:18:08,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:08,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:18:08,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700632565] [2020-10-28 15:18:08,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:18:08,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:18:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:18:08,410 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-10-28 15:18:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:08,869 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 15:18:08,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:18:08,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-28 15:18:08,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:08,873 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:18:08,873 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:18:08,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:18:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:18:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-28 15:18:08,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-28 15:18:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-28 15:18:08,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-10-28 15:18:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:08,886 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-28 15:18:08,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:18:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-28 15:18:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 15:18:08,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:18:08,887 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:18:08,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:18:08,887 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:18:08,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:18:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -779124725, now seen corresponding path program 5 times [2020-10-28 15:18:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:18:08,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234262122] [2020-10-28 15:18:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:18:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:08,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:09,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:09,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 15:18:09,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:09,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-28 15:18:09,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:09,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:09,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:18:09,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:18:09,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:18:09,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:09,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:18:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:18:09,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:18:09,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:18:09,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:18:09,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:18:09,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:18:09,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:18:09,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:18:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:18:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:18:09,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:18:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:18:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:18:09,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234262122] [2020-10-28 15:18:09,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:18:09,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:18:09,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461833093] [2020-10-28 15:18:09,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:18:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:18:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:18:09,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:18:09,408 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2020-10-28 15:18:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:18:09,678 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-28 15:18:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:18:09,682 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-28 15:18:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:18:09,682 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:18:09,683 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:18:09,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:18:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:18:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:18:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:18:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:18:09,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-10-28 15:18:09,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:18:09,685 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:18:09,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:18:09,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:18:09,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:18:09,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:18:09,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:18:10,020 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 15:18:10,020 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 15:18:10,020 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 15:18:10,021 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 15:18:10,021 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:18:10,022 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 15:18:10,023 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:18:10,023 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:18:10,023 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:18:10,023 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:18:10,023 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:18:10,023 INFO L274 CegarLoopResult]: For program point L30(line 30) no Hoare annotation was computed. [2020-10-28 15:18:10,023 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 14 34) the Hoare annotation is: true [2020-10-28 15:18:10,024 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 14 34) no Hoare annotation was computed. [2020-10-28 15:18:10,039 INFO L274 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2020-10-28 15:18:10,039 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2020-10-28 15:18:10,039 INFO L270 CegarLoopResult]: At program point L21-2(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-10-28 15:18:10,040 INFO L270 CegarLoopResult]: At program point L21-3(lines 21 29) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-10-28 15:18:10,040 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 14 34) no Hoare annotation was computed. [2020-10-28 15:18:10,041 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-28 15:18:10,041 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-28 15:18:10,041 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:18:10,041 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-28 15:18:10,041 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-28 15:18:10,042 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-28 15:18:10,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:18:10 BoogieIcfgContainer [2020-10-28 15:18:10,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:18:10,067 INFO L168 Benchmark]: Toolchain (without parser) took 7299.54 ms. Allocated memory was 159.4 MB in the beginning and 238.0 MB in the end (delta: 78.6 MB). Free memory was 135.1 MB in the beginning and 219.4 MB in the end (delta: -84.4 MB). Peak memory consumption was 107.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:10,070 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 159.4 MB. Free memory is still 132.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:18:10,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.85 ms. Allocated memory is still 159.4 MB. Free memory was 134.5 MB in the beginning and 124.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:10,078 INFO L168 Benchmark]: Boogie Preprocessor took 38.09 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 123.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:10,079 INFO L168 Benchmark]: RCFGBuilder took 369.84 ms. Allocated memory is still 159.4 MB. Free memory was 123.3 MB in the beginning and 110.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:10,080 INFO L168 Benchmark]: TraceAbstraction took 6606.97 ms. Allocated memory was 159.4 MB in the beginning and 238.0 MB in the end (delta: 78.6 MB). Free memory was 110.5 MB in the beginning and 219.4 MB in the end (delta: -108.9 MB). Peak memory consumption was 83.4 MB. Max. memory is 8.0 GB. [2020-10-28 15:18:10,094 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 159.4 MB. Free memory is still 132.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.85 ms. Allocated memory is still 159.4 MB. Free memory was 134.5 MB in the beginning and 124.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.09 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 123.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.84 ms. Allocated memory is still 159.4 MB. Free memory was 123.3 MB in the beginning and 110.9 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6606.97 ms. Allocated memory was 159.4 MB in the beginning and 238.0 MB in the end (delta: 78.6 MB). Free memory was 110.5 MB in the beginning and 219.4 MB in the end (delta: -108.9 MB). Peak memory consumption was 83.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 143 SDslu, 174 SDs, 0 SdLazy, 423 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 35 PreInvPairs, 45 NumberOfFragments, 61 HoareAnnotationTreeSize, 35 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 507 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 13762 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 9/75 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...