/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:12:12,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:12:12,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:12:12,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 20:12:12,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 20:12:12,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 20:12:12,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 20:12:12,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 20:12:12,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 20:12:12,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 20:12:12,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 20:12:12,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 20:12:12,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:12:12,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:12:12,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:12:12,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:12:12,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:12:12,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:12:12,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:12:12,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:12:12,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:12:12,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:12:12,777 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:12:12,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:12:12,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:12:12,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:12:12,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:12:12,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:12:12,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 20:12:12,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:12:12,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:12:12,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:12:12,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:12:12,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:12:12,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:12:12,817 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:12:12,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:12:12,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:12:12,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:12:12,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:12:12,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:12:12,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:12:12,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:12:12,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:12:12,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:12:12,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:12:12,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:12:12,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:12:12,822 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:12:12,822 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:12:12,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:12:13,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:12:13,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:12:13,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:12:13,023 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:12:13,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-01-10 20:12:13,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f474e46c1/375fad75cf6f48fc9bf6f0b15d29ca33/FLAG0b79e3aa6 [2022-01-10 20:12:13,415 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:12:13,415 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2022-01-10 20:12:13,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f474e46c1/375fad75cf6f48fc9bf6f0b15d29ca33/FLAG0b79e3aa6 [2022-01-10 20:12:13,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f474e46c1/375fad75cf6f48fc9bf6f0b15d29ca33 [2022-01-10 20:12:13,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:12:13,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:12:13,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:12:13,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:12:13,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:12:13,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b4f27f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13, skipping insertion in model container [2022-01-10 20:12:13,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:12:13,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:12:13,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2022-01-10 20:12:13,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:12:13,592 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:12:13,600 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i[849,862] [2022-01-10 20:12:13,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:12:13,619 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:12:13,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13 WrapperNode [2022-01-10 20:12:13,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:12:13,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:12:13,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:12:13,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:12:13,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,641 INFO L137 Inliner]: procedures = 18, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-01-10 20:12:13,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:12:13,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:12:13,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:12:13,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:12:13,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:12:13,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:12:13,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:12:13,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:12:13,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:12:13,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:12:13,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 20:12:13,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:12:13,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 20:12:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 20:12:13,771 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:12:13,772 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:12:13,862 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:12:13,866 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:12:13,866 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 20:12:13,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:12:13 BoogieIcfgContainer [2022-01-10 20:12:13,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:12:13,868 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:12:13,868 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:12:13,868 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:12:13,870 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:12:13" (1/1) ... [2022-01-10 20:12:13,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:12:13 BasicIcfg [2022-01-10 20:12:13,973 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:12:13,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:12:13,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:12:13,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:12:13,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:12:13" (1/4) ... [2022-01-10 20:12:13,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14612d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:12:13, skipping insertion in model container [2022-01-10 20:12:13,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:12:13" (2/4) ... [2022-01-10 20:12:13,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14612d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:12:13, skipping insertion in model container [2022-01-10 20:12:13,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:12:13" (3/4) ... [2022-01-10 20:12:13,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14612d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:12:13, skipping insertion in model container [2022-01-10 20:12:13,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:12:13" (4/4) ... [2022-01-10 20:12:13,978 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1.iTransformedIcfg [2022-01-10 20:12:13,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:12:13,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:12:14,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:12:14,036 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 20:12:14,036 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:12:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 20:12:14,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:12:14,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:12:14,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:12:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:12:14,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1392925239, now seen corresponding path program 1 times [2022-01-10 20:12:14,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:12:14,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730431807] [2022-01-10 20:12:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:12:14,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:12:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:12:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:12:14,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:12:14,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730431807] [2022-01-10 20:12:14,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730431807] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:12:14,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:12:14,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:12:14,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750554590] [2022-01-10 20:12:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:12:14,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:12:14,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:12:14,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:12:14,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:12:14,207 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:12:14,217 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-01-10 20:12:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:12:14,218 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 20:12:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:12:14,223 INFO L225 Difference]: With dead ends: 26 [2022-01-10 20:12:14,223 INFO L226 Difference]: Without dead ends: 11 [2022-01-10 20:12:14,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:12:14,227 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:12:14,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:12:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-10 20:12:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-10 20:12:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-01-10 20:12:14,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-01-10 20:12:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:12:14,246 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-01-10 20:12:14,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-01-10 20:12:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 20:12:14,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:12:14,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:12:14,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:12:14,247 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:12:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:12:14,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1392895448, now seen corresponding path program 1 times [2022-01-10 20:12:14,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:12:14,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512864747] [2022-01-10 20:12:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:12:14,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:12:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:12:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:12:14,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:12:14,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512864747] [2022-01-10 20:12:14,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512864747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:12:14,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:12:14,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:12:14,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176795353] [2022-01-10 20:12:14,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:12:14,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:12:14,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:12:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:12:14,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:12:14,342 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:12:14,364 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-01-10 20:12:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:12:14,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 20:12:14,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:12:14,365 INFO L225 Difference]: With dead ends: 22 [2022-01-10 20:12:14,365 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 20:12:14,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:12:14,366 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:12:14,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:12:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 20:12:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-01-10 20:12:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-01-10 20:12:14,369 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-01-10 20:12:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:12:14,370 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-01-10 20:12:14,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-01-10 20:12:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:12:14,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:12:14,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:12:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 20:12:14,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:12:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:12:14,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2079737204, now seen corresponding path program 1 times [2022-01-10 20:12:14,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:12:14,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107176579] [2022-01-10 20:12:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:12:14,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:12:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:12:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:12:14,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:12:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107176579] [2022-01-10 20:12:14,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107176579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:12:14,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667229838] [2022-01-10 20:12:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:12:14,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:12:14,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:12:14,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:12:14,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 20:12:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:12:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-10 20:12:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:12:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:12:14,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:12:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:12:14,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667229838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:12:14,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:12:14,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 20:12:14,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213436625] [2022-01-10 20:12:14,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:12:14,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 20:12:14,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:12:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 20:12:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:12:14,850 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:12:15,007 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-01-10 20:12:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:12:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 20:12:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:12:15,008 INFO L225 Difference]: With dead ends: 33 [2022-01-10 20:12:15,008 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 20:12:15,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:12:15,009 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:12:15,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:12:15,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 20:12:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 20:12:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-10 20:12:15,014 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2022-01-10 20:12:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:12:15,014 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-10 20:12:15,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-10 20:12:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 20:12:15,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:12:15,015 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:12:15,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 20:12:15,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:12:15,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:12:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:12:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1846910904, now seen corresponding path program 2 times [2022-01-10 20:12:15,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:12:15,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440411941] [2022-01-10 20:12:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:12:15,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:12:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:12:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 20:12:15,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:12:15,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440411941] [2022-01-10 20:12:15,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440411941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:12:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258959473] [2022-01-10 20:12:15,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:12:15,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:12:15,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:12:15,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:12:15,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 20:12:15,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:12:15,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:12:15,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 20:12:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:12:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 20:12:16,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:12:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 20:12:17,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258959473] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:12:17,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:12:17,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-10 20:12:17,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174386418] [2022-01-10 20:12:17,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:12:17,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 20:12:17,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:12:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 20:12:17,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 20:12:17,818 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:12:28,769 WARN L228 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 42 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 20:12:41,591 WARN L228 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 45 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 20:13:07,245 WARN L228 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 20:13:07,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:13:07,599 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-01-10 20:13:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 20:13:07,600 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 20:13:07,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:13:07,601 INFO L225 Difference]: With dead ends: 61 [2022-01-10 20:13:07,601 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 20:13:07,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=178, Invalid=319, Unknown=9, NotChecked=0, Total=506 [2022-01-10 20:13:07,602 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 20:13:07,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 32 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 86 Invalid, 0 Unknown, 49 Unchecked, 1.2s Time] [2022-01-10 20:13:07,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 20:13:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-10 20:13:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-01-10 20:13:07,609 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 24 [2022-01-10 20:13:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:13:07,609 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-01-10 20:13:07,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-01-10 20:13:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 20:13:07,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:13:07,610 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:13:07,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 20:13:07,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 20:13:07,811 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:13:07,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:13:07,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1195253554, now seen corresponding path program 3 times [2022-01-10 20:13:07,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:13:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594918187] [2022-01-10 20:13:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:07,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:13:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-01-10 20:13:08,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:13:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594918187] [2022-01-10 20:13:08,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594918187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:13:08,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525652167] [2022-01-10 20:13:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:13:08,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:13:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:13:08,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:13:08,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process