/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_BITWISE.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 11:52:45,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 11:52:45,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 11:52:45,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 11:52:45,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 11:52:45,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 11:52:45,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 11:52:45,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 11:52:45,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 11:52:45,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 11:52:45,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 11:52:45,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 11:52:45,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 11:52:45,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 11:52:45,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 11:52:45,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 11:52:45,726 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 11:52:45,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 11:52:45,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 11:52:45,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 11:52:45,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 11:52:45,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 11:52:45,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 11:52:45,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 11:52:45,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 11:52:45,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 11:52:45,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 11:52:45,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 11:52:45,755 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 11:52:45,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 11:52:45,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 11:52:45,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 11:52:45,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 11:52:45,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 11:52:45,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 11:52:45,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 11:52:45,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 11:52:45,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 11:52:45,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 11:52:45,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 11:52:45,783 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 11:52:45,783 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 11:52:45,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 11:52:46,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 11:52:46,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 11:52:46,011 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 11:52:46,013 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 11:52:46,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2022-01-10 11:52:46,060 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba7b7c99/2e554196d19c4a9e818e33e524adc71e/FLAG13556079d [2022-01-10 11:52:46,366 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 11:52:46,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2022-01-10 11:52:46,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba7b7c99/2e554196d19c4a9e818e33e524adc71e/FLAG13556079d [2022-01-10 11:52:46,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eba7b7c99/2e554196d19c4a9e818e33e524adc71e [2022-01-10 11:52:46,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 11:52:46,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 11:52:46,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 11:52:46,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 11:52:46,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 11:52:46,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e3c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46, skipping insertion in model container [2022-01-10 11:52:46,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 11:52:46,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 11:52:46,587 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c[704,717] [2022-01-10 11:52:46,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 11:52:46,596 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 11:52:46,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c[704,717] [2022-01-10 11:52:46,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 11:52:46,632 INFO L208 MainTranslator]: Completed translation [2022-01-10 11:52:46,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46 WrapperNode [2022-01-10 11:52:46,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 11:52:46,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 11:52:46,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 11:52:46,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 11:52:46,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,661 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-01-10 11:52:46,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 11:52:46,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 11:52:46,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 11:52:46,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 11:52:46,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 11:52:46,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 11:52:46,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 11:52:46,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 11:52:46,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:46,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 11:52:46,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:52:46,781 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 11:52:46,795 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 11:52:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 11:52:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 11:52:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 11:52:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 11:52:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 11:52:46,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 11:52:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 11:52:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 11:52:46,854 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 11:52:46,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 11:52:46,952 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 11:52:46,956 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 11:52:46,956 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 11:52:46,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:52:46 BoogieIcfgContainer [2022-01-10 11:52:46,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 11:52:46,957 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 11:52:46,958 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 11:52:46,959 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 11:52:46,960 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:52:46" (1/1) ... [2022-01-10 11:52:47,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:52:47 BasicIcfg [2022-01-10 11:52:47,051 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 11:52:47,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 11:52:47,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 11:52:47,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 11:52:47,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:52:46" (1/4) ... [2022-01-10 11:52:47,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3bb541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:52:47, skipping insertion in model container [2022-01-10 11:52:47,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:52:46" (2/4) ... [2022-01-10 11:52:47,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3bb541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:52:47, skipping insertion in model container [2022-01-10 11:52:47,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:52:46" (3/4) ... [2022-01-10 11:52:47,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f3bb541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:52:47, skipping insertion in model container [2022-01-10 11:52:47,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:52:47" (4/4) ... [2022-01-10 11:52:47,060 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-1.cTransformedIcfg [2022-01-10 11:52:47,064 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 11:52:47,064 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 11:52:47,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 11:52:47,108 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 11:52:47,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 11:52:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 11:52:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 11:52:47,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:52:47,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:52:47,123 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:52:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:52:47,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1226820214, now seen corresponding path program 1 times [2022-01-10 11:52:47,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:52:47,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637561529] [2022-01-10 11:52:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:52:47,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:52:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:52:47,310 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 11:52:47,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:52:47,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637561529] [2022-01-10 11:52:47,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637561529] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:52:47,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:52:47,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 11:52:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091282235] [2022-01-10 11:52:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:52:47,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 11:52:47,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:52:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 11:52:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 11:52:47,333 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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) 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 11:52:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:52:47,341 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-01-10 11:52:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 11:52:47,342 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 11:52:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:52:47,347 INFO L225 Difference]: With dead ends: 23 [2022-01-10 11:52:47,347 INFO L226 Difference]: Without dead ends: 10 [2022-01-10 11:52:47,349 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 11:52:47,354 INFO L933 BasicCegarLoop]: 15 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, 15 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 11:52:47,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:52:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-10 11:52:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-10 11:52:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 11:52:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-01-10 11:52:47,376 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2022-01-10 11:52:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:52:47,377 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-01-10 11:52:47,377 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 11:52:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-01-10 11:52:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 11:52:47,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:52:47,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:52:47,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 11:52:47,379 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:52:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:52:47,381 INFO L85 PathProgramCache]: Analyzing trace with hash 652710606, now seen corresponding path program 1 times [2022-01-10 11:52:47,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:52:47,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849653687] [2022-01-10 11:52:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:52:47,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:52:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:52:47,727 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 11:52:47,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:52:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849653687] [2022-01-10 11:52:47,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849653687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 11:52:47,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 11:52:47,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 11:52:47,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953015409] [2022-01-10 11:52:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 11:52:47,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 11:52:47,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:52:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 11:52:47,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 11:52:47,730 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 11:52:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:52:47,812 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2022-01-10 11:52:47,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 11:52:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-01-10 11:52:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:52:47,813 INFO L225 Difference]: With dead ends: 17 [2022-01-10 11:52:47,813 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 11:52:47,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 11:52:47,814 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 11:52:47,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 11:52:47,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 11:52:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-10 11:52:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 11:52:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-01-10 11:52:47,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2022-01-10 11:52:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:52:47,818 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-01-10 11:52:47,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 11:52:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-01-10 11:52:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 11:52:47,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:52:47,819 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:52:47,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 11:52:47,819 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:52:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:52:47,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1016960978, now seen corresponding path program 1 times [2022-01-10 11:52:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:52:47,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487569055] [2022-01-10 11:52:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:52:47,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:52:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:52:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:52:48,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:52:48,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487569055] [2022-01-10 11:52:48,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487569055] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:52:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750953151] [2022-01-10 11:52:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:52:48,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:52:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:52:48,656 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 11:52:48,703 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 11:52:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:52:48,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-10 11:52:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:52:49,051 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 85 treesize of output 81 [2022-01-10 11:52:58,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 11:52:58,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 11:52:58,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 30 [2022-01-10 11:52:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:52:58,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 11:53:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:53:00,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750953151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 11:53:00,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 11:53:00,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 14 [2022-01-10 11:53:00,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503027444] [2022-01-10 11:53:00,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 11:53:00,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 11:53:00,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:53:00,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 11:53:00,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-01-10 11:53:00,011 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 11:53:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 11:53:01,608 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-01-10 11:53:01,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 11:53:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 11:53:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 11:53:01,609 INFO L225 Difference]: With dead ends: 21 [2022-01-10 11:53:01,609 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 11:53:01,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-10 11:53:01,610 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 11:53:01,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-01-10 11:53:01,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 11:53:01,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 11:53:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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 11:53:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-01-10 11:53:01,613 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2022-01-10 11:53:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 11:53:01,613 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-01-10 11:53:01,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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 11:53:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-01-10 11:53:01,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 11:53:01,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 11:53:01,614 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 11:53:01,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 11:53:01,833 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 11:53:01,834 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 11:53:01,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 11:53:01,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1313492698, now seen corresponding path program 2 times [2022-01-10 11:53:01,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 11:53:01,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605753211] [2022-01-10 11:53:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 11:53:01,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 11:53:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 11:53:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 11:53:02,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 11:53:02,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605753211] [2022-01-10 11:53:02,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605753211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 11:53:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691950020] [2022-01-10 11:53:02,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 11:53:02,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 11:53:02,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 11:53:02,162 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 11:53:02,197 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 11:53:02,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 11:53:02,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 11:53:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-10 11:53:02,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 11:53:02,571 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 56 treesize of output 52 [2022-01-10 11:53:47,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 11:53:48,629 INFO L353 Elim1Store]: treesize reduction 120, result has 5.5 percent of original size [2022-01-10 11:53:48,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 423 treesize of output 118 [2022-01-10 11:53:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 11:53:52,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 11:53:56,778 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 80 treesize of output 78 [2022-01-10 11:53:56,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 161 treesize of output 143 [2022-01-10 11:53:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 11:53:58,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691950020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 11:53:58,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 11:53:58,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 23 [2022-01-10 11:53:58,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189403265] [2022-01-10 11:53:58,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 11:53:58,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 11:53:58,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 11:53:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 11:53:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-10 11:53:58,912 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 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)