/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/array-fpi/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:36:12,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:36:12,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:36:12,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 21:36:12,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 21:36:12,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 21:36:12,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 21:36:12,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 21:36:12,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 21:36:12,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 21:36:12,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 21:36:12,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 21:36:12,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:36:12,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:36:12,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:36:12,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:36:12,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:36:12,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:36:12,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:36:12,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:36:12,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:36:12,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:36:12,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:36:12,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:36:12,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:36:12,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:36:12,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:36:12,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:36:12,844 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 21:36:12,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:36:12,870 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:36:12,870 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:36:12,870 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:36:12,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:36:12,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:36:12,871 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:36:12,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:36:12,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:36:12,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:36:12,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:36:12,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:36:12,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:36:12,874 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:36:12,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:36:13,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:36:13,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:36:13,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:36:13,116 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:36:13,131 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:36:13,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2022-01-10 21:36:13,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d8b1d35/a82159a53c57488db817e7362e86adc1/FLAG0b95f6bae [2022-01-10 21:36:13,544 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:36:13,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1.c [2022-01-10 21:36:13,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d8b1d35/a82159a53c57488db817e7362e86adc1/FLAG0b95f6bae [2022-01-10 21:36:13,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98d8b1d35/a82159a53c57488db817e7362e86adc1 [2022-01-10 21:36:13,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:36:13,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:36:13,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:36:13,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:36:13,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:36:13,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:36:13" (1/1) ... [2022-01-10 21:36:13,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e00dc79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:13, skipping insertion in model container [2022-01-10 21:36:13,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:36:13" (1/1) ... [2022-01-10 21:36:13,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:36:13,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:36:14,133 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1.c[586,599] [2022-01-10 21:36:14,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:36:14,160 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:36:14,173 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1.c[586,599] [2022-01-10 21:36:14,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:36:14,200 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:36:14,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14 WrapperNode [2022-01-10 21:36:14,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:36:14,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:36:14,201 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:36:14,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:36:14,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,211 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,222 INFO L137 Inliner]: procedures = 19, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2022-01-10 21:36:14,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:36:14,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:36:14,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:36:14,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:36:14,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,239 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:36:14,240 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:36:14,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:36:14,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:36:14,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:36:14,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:14,268 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 21:36:14,270 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 21:36:14,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:36:14,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:36:14,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:36:14,353 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:36:14,354 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:36:14,492 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:36:14,496 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:36:14,497 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 21:36:14,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:36:14 BoogieIcfgContainer [2022-01-10 21:36:14,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:36:14,499 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:36:14,499 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:36:14,499 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:36:14,502 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:36:14" (1/1) ... [2022-01-10 21:36:14,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:36:14 BasicIcfg [2022-01-10 21:36:14,602 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:36:14,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:36:14,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:36:14,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:36:14,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:36:13" (1/4) ... [2022-01-10 21:36:14,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f750a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:36:14, skipping insertion in model container [2022-01-10 21:36:14,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:36:14" (2/4) ... [2022-01-10 21:36:14,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f750a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:36:14, skipping insertion in model container [2022-01-10 21:36:14,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:36:14" (3/4) ... [2022-01-10 21:36:14,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f750a45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:36:14, skipping insertion in model container [2022-01-10 21:36:14,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:36:14" (4/4) ... [2022-01-10 21:36:14,607 INFO L111 eAbstractionObserver]: Analyzing ICFG ms1.cTransformedIcfg [2022-01-10 21:36:14,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:36:14,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:36:14,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:36:14,652 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 21:36:14,652 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:36:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 21:36:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 21:36:14,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:14,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:14,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:14,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1120674602, now seen corresponding path program 1 times [2022-01-10 21:36:14,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:14,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897074932] [2022-01-10 21:36:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:14,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:14,864 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 21:36:14,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:14,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897074932] [2022-01-10 21:36:14,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897074932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:14,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:14,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:36:14,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163581195] [2022-01-10 21:36:14,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:14,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:36:14,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:36:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:36:14,904 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 21:36:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:14,917 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-01-10 21:36:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:36:14,919 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-01-10 21:36:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:14,924 INFO L225 Difference]: With dead ends: 34 [2022-01-10 21:36:14,924 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 21:36:14,927 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 21:36:14,932 INFO L933 BasicCegarLoop]: 22 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, 22 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 21:36:14,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:36:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 21:36:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 21:36:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 21:36:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 21:36:14,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-10 21:36:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:14,957 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 21:36:14,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 21:36:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 21:36:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 21:36:14,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:14,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:14,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:36:14,960 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1402823417, now seen corresponding path program 1 times [2022-01-10 21:36:14,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:14,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361385379] [2022-01-10 21:36:14,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:14,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:15,150 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 21:36:15,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:15,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361385379] [2022-01-10 21:36:15,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361385379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:15,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:15,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:36:15,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965311805] [2022-01-10 21:36:15,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:15,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:36:15,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:36:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:36:15,165 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 21:36:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:15,220 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-01-10 21:36:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:36:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-01-10 21:36:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:15,221 INFO L225 Difference]: With dead ends: 28 [2022-01-10 21:36:15,221 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 21:36:15,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:36:15,228 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:15,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:36:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 21:36:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-01-10 21:36:15,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 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 21:36:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 21:36:15,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-10 21:36:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:15,235 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 21:36:15,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 21:36:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 21:36:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 21:36:15,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:15,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:15,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:36:15,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2086965841, now seen corresponding path program 1 times [2022-01-10 21:36:15,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261910545] [2022-01-10 21:36:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:15,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:36:15,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261910545] [2022-01-10 21:36:15,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261910545] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:15,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:15,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:36:15,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921800705] [2022-01-10 21:36:15,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:15,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:36:15,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:36:15,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:36:15,287 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 21:36:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:15,307 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-01-10 21:36:15,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:36:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2022-01-10 21:36:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:15,308 INFO L225 Difference]: With dead ends: 27 [2022-01-10 21:36:15,308 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 21:36:15,309 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 21:36:15,309 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:15,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:36:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 21:36:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-01-10 21:36:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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 21:36:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-01-10 21:36:15,313 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2022-01-10 21:36:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:15,313 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-01-10 21:36:15,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 21:36:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-01-10 21:36:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 21:36:15,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:15,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:36:15,325 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2058336690, now seen corresponding path program 1 times [2022-01-10 21:36:15,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422049702] [2022-01-10 21:36:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:15,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 21:36:15,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:15,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422049702] [2022-01-10 21:36:15,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422049702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:36:15,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:36:15,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:36:15,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926872028] [2022-01-10 21:36:15,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:36:15,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:36:15,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:36:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:36:15,392 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 21:36:15,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:15,413 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-10 21:36:15,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:36:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2022-01-10 21:36:15,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:15,414 INFO L225 Difference]: With dead ends: 25 [2022-01-10 21:36:15,414 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 21:36:15,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:36:15,415 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:15,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 41 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:36:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 21:36:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-10 21:36:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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 21:36:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-10 21:36:15,419 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2022-01-10 21:36:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:15,419 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-10 21:36:15,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 21:36:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-10 21:36:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 21:36:15,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:15,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:15,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:36:15,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1606695048, now seen corresponding path program 1 times [2022-01-10 21:36:15,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:15,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872586405] [2022-01-10 21:36:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:15,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:15,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:15,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872586405] [2022-01-10 21:36:15,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872586405] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:36:15,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858590466] [2022-01-10 21:36:15,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:15,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:15,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:15,647 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 21:36:15,675 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 21:36:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:15,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:36:15,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:36:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:34,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:36:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:38,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858590466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:36:38,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:36:38,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-01-10 21:36:38,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351424734] [2022-01-10 21:36:38,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:36:38,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 21:36:38,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:38,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 21:36:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=177, Unknown=6, NotChecked=0, Total=240 [2022-01-10 21:36:38,667 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 21:36:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:43,024 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-10 21:36:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 21:36:43,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 19 [2022-01-10 21:36:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:43,025 INFO L225 Difference]: With dead ends: 39 [2022-01-10 21:36:43,025 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 21:36:43,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=80, Invalid=218, Unknown=8, NotChecked=0, Total=306 [2022-01-10 21:36:43,027 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:43,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 47 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 91 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-01-10 21:36:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 21:36:43,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-10 21:36:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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 21:36:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-10 21:36:43,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2022-01-10 21:36:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:43,030 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-10 21:36:43,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 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 21:36:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-10 21:36:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 21:36:43,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:43,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:43,051 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 21:36:43,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:43,244 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 345560586, now seen corresponding path program 2 times [2022-01-10 21:36:43,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:43,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604916765] [2022-01-10 21:36:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:43,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:44,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604916765] [2022-01-10 21:36:44,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604916765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:36:44,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107620865] [2022-01-10 21:36:44,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:36:44,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:44,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:44,845 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 21:36:44,846 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 21:36:44,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:36:44,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:36:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-10 21:36:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:36:45,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-10 21:36:45,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:45,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-01-10 21:36:45,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 21:36:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 21:36:45,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 43 [2022-01-10 21:36:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:45,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:36:48,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 246 [2022-01-10 21:36:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:50,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107620865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:36:50,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:36:50,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-01-10 21:36:50,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815864017] [2022-01-10 21:36:50,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:36:50,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-10 21:36:50,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-10 21:36:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=711, Unknown=2, NotChecked=0, Total=870 [2022-01-10 21:36:50,122 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 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 21:36:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:50,854 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-01-10 21:36:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 21:36:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 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 21 [2022-01-10 21:36:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:50,855 INFO L225 Difference]: With dead ends: 31 [2022-01-10 21:36:50,855 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 21:36:50,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=196, Invalid=858, Unknown=2, NotChecked=0, Total=1056 [2022-01-10 21:36:50,857 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:50,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 51 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 144 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-01-10 21:36:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 21:36:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 21:36:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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 21:36:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-10 21:36:50,862 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-01-10 21:36:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:50,862 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-10 21:36:50,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 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 21:36:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-10 21:36:50,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 21:36:50,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:50,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:50,870 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 21:36:51,067 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,SelfDestructingSolverStorable5 [2022-01-10 21:36:51,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash 505257264, now seen corresponding path program 3 times [2022-01-10 21:36:51,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:51,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325017292] [2022-01-10 21:36:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:51,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:36:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:51,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:36:51,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325017292] [2022-01-10 21:36:51,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325017292] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:36:51,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705725736] [2022-01-10 21:36:51,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:36:51,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:36:51,363 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 21:36:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 21:36:51,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 21:36:51,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:36:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 21:36:51,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:36:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:52,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:36:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:36:53,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705725736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:36:53,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:36:53,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-01-10 21:36:53,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052518841] [2022-01-10 21:36:53,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:36:53,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 21:36:53,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:36:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 21:36:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-10 21:36:53,135 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 21:36:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:36:53,360 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-01-10 21:36:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 21:36:53,362 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 21:36:53,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:36:53,363 INFO L225 Difference]: With dead ends: 49 [2022-01-10 21:36:53,363 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 21:36:53,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-10 21:36:53,364 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:36:53,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 54 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 121 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-01-10 21:36:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 21:36:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-01-10 21:36:53,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 21:36:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 21:36:53,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-01-10 21:36:53,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:36:53,368 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 21:36:53,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 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 21:36:53,368 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 21:36:53,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 21:36:53,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:36:53,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:36:53,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 21:36:53,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:36:53,573 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:36:53,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:36:53,573 INFO L85 PathProgramCache]: Analyzing trace with hash 343482606, now seen corresponding path program 4 times [2022-01-10 21:36:53,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:36:53,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145408684] [2022-01-10 21:36:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:36:53,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:36:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat