/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:00:19,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:00:19,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:00:19,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:00:19,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:00:19,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:00:19,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:00:19,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:00:19,649 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:00:19,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:00:19,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:00:19,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:00:19,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:00:19,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:00:19,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:00:19,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:00:19,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:00:19,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:00:19,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:00:19,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:00:19,665 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:00:19,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:00:19,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:00:19,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:00:19,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:00:19,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 22:00:19,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:00:19,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:00:19,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:00:19,687 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:00:19,713 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:00:19,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:00:19,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:00:19,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:00:19,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:00:19,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:00:19,716 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:00:19,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:00:19,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:00:19,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:00:19,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:00:19,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:00:19,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:00:19,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:00:19,718 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:00:19,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:00:19,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:00:19,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:00:19,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:00:19,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:00:19,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:00:19,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:00:19,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:00:19,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:00:19,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:00:19,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:00:19,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:00:19,720 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:00:19,722 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:00:19,722 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:00:19,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:00:19,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:00:19,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:00:19,979 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:00:19,980 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:00:19,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-18 22:00:20,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215f82292/4d420da999ad41acb3583622327c07e6/FLAG364654355 [2022-03-18 22:00:20,384 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:00:20,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-18 22:00:20,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215f82292/4d420da999ad41acb3583622327c07e6/FLAG364654355 [2022-03-18 22:00:20,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/215f82292/4d420da999ad41acb3583622327c07e6 [2022-03-18 22:00:20,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:00:20,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:00:20,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:00:20,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:00:20,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:00:20,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:00:20" (1/1) ... [2022-03-18 22:00:20,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66209480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:20, skipping insertion in model container [2022-03-18 22:00:20,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:00:20" (1/1) ... [2022-03-18 22:00:20,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:00:20,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:00:20,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-18 22:00:20,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:00:20,995 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:00:21,004 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-18 22:00:21,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:00:21,017 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:00:21,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21 WrapperNode [2022-03-18 22:00:21,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:00:21,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:00:21,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:00:21,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:00:21,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:00:21,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:00:21,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:00:21,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:00:21,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:00:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:21,084 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) [2022-03-18 22:00:21,106 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 [2022-03-18 22:00:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:00:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:00:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:00:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 22:00:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:00:21,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 22:00:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:00:21,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:00:21,178 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:00:21,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:00:21,272 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:00:21,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:00:21,277 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 22:00:21,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:00:21 BoogieIcfgContainer [2022-03-18 22:00:21,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:00:21,279 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:00:21,279 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:00:21,280 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:00:21,285 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:00:21" (1/1) ... [2022-03-18 22:00:21,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:00:21 BasicIcfg [2022-03-18 22:00:21,300 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:00:21,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:00:21,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:00:21,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:00:21,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:00:20" (1/4) ... [2022-03-18 22:00:21,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a178e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:00:21, skipping insertion in model container [2022-03-18 22:00:21,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:00:21" (2/4) ... [2022-03-18 22:00:21,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a178e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:00:21, skipping insertion in model container [2022-03-18 22:00:21,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:00:21" (3/4) ... [2022-03-18 22:00:21,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a178e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:00:21, skipping insertion in model container [2022-03-18 22:00:21,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:00:21" (4/4) ... [2022-03-18 22:00:21,306 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.iqvasr [2022-03-18 22:00:21,310 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:00:21,310 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:00:21,344 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:00:21,374 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-18 22:00:21,374 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:00:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:00:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 22:00:21,412 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:21,413 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:21,413 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1476197606, now seen corresponding path program 1 times [2022-03-18 22:00:21,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:21,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301688377] [2022-03-18 22:00:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:21,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:21,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:21,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301688377] [2022-03-18 22:00:21,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301688377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:00:21,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:00:21,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:00:21,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652595209] [2022-03-18 22:00:21,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:00:21,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:00:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:21,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:00:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:00:21,622 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:00:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:21,657 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-03-18 22:00:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:00:21,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 22:00:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:21,664 INFO L225 Difference]: With dead ends: 41 [2022-03-18 22:00:21,664 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 22:00:21,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:00:21,668 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:21,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:00:21,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 22:00:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 22:00:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 22:00:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-03-18 22:00:21,692 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-03-18 22:00:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:21,693 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-03-18 22:00:21,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:00:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-03-18 22:00:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 22:00:21,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:21,694 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:21,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:00:21,694 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:21,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:21,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1931266009, now seen corresponding path program 1 times [2022-03-18 22:00:21,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:21,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136826332] [2022-03-18 22:00:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:21,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:21,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136826332] [2022-03-18 22:00:21,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136826332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:00:21,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:00:21,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 22:00:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053434944] [2022-03-18 22:00:21,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:00:21,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 22:00:21,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:21,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 22:00:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 22:00:21,784 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:00:21,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:21,850 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-03-18 22:00:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 22:00:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 22:00:21,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:21,852 INFO L225 Difference]: With dead ends: 34 [2022-03-18 22:00:21,852 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 22:00:21,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 22:00:21,854 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:21,854 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:00:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 22:00:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 22:00:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 22:00:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-18 22:00:21,862 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-18 22:00:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:21,863 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-18 22:00:21,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:00:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-18 22:00:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 22:00:21,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:21,864 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:21,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:00:21,864 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:21,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1791050651, now seen corresponding path program 1 times [2022-03-18 22:00:21,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:21,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172988591] [2022-03-18 22:00:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:21,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:22,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:22,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172988591] [2022-03-18 22:00:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172988591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736230603] [2022-03-18 22:00:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:22,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:22,140 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) [2022-03-18 22:00:22,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:00:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:22,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 22:00:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:22,299 INFO L390 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 11 treesize of output 7 [2022-03-18 22:00:22,367 INFO L390 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 15 treesize of output 7 [2022-03-18 22:00:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:22,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:22,482 INFO L390 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 14 treesize of output 12 [2022-03-18 22:00:22,486 INFO L390 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 22 treesize of output 20 [2022-03-18 22:00:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:22,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736230603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:00:22,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:00:22,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-18 22:00:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797300028] [2022-03-18 22:00:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:22,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 22:00:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:22,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 22:00:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-18 22:00:22,520 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:00:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:22,713 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-18 22:00:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 22:00:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 22:00:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:22,717 INFO L225 Difference]: With dead ends: 32 [2022-03-18 22:00:22,717 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 22:00:22,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-18 22:00:22,720 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:22,721 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 53 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:00:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 22:00:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-18 22:00:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:00:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-18 22:00:22,736 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-18 22:00:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:22,736 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-18 22:00:22,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:00:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-18 22:00:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 22:00:22,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:22,738 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:22,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 22:00:22,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:22,958 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:22,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1619165115, now seen corresponding path program 1 times [2022-03-18 22:00:22,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:22,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816742210] [2022-03-18 22:00:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 22:00:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816742210] [2022-03-18 22:00:23,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816742210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:23,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651226508] [2022-03-18 22:00:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:23,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:23,096 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) [2022-03-18 22:00:23,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:00:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 22:00:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:23,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:23,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651226508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:00:23,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:00:23,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-18 22:00:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376388857] [2022-03-18 22:00:23,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:23,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 22:00:23,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:23,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 22:00:23,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:00:23,327 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:00:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:23,451 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-18 22:00:23,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 22:00:23,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-03-18 22:00:23,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:23,454 INFO L225 Difference]: With dead ends: 46 [2022-03-18 22:00:23,454 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 22:00:23,454 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-18 22:00:23,455 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:23,455 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 47 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:00:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 22:00:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-18 22:00:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:00:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-18 22:00:23,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-18 22:00:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:23,463 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-18 22:00:23,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:00:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-18 22:00:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 22:00:23,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:23,464 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:23,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:00:23,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 22:00:23,679 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash -290697607, now seen corresponding path program 2 times [2022-03-18 22:00:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503328261] [2022-03-18 22:00:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:23,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 22:00:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:23,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503328261] [2022-03-18 22:00:23,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503328261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:23,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567901714] [2022-03-18 22:00:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:00:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:23,825 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) [2022-03-18 22:00:23,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:00:23,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:00:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:00:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:00:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:23,907 INFO L390 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 15 treesize of output 11 [2022-03-18 22:00:26,120 INFO L390 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 19 treesize of output 7 [2022-03-18 22:00:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:26,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:28,235 INFO L390 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 16 treesize of output 14 [2022-03-18 22:00:28,237 INFO L390 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 28 treesize of output 24 [2022-03-18 22:00:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:00:28,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567901714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:00:28,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:00:28,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 17 [2022-03-18 22:00:28,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205627684] [2022-03-18 22:00:28,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:28,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 22:00:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:28,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 22:00:28,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=227, Unknown=2, NotChecked=0, Total=272 [2022-03-18 22:00:28,264 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 22:00:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:28,726 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-03-18 22:00:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 22:00:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-03-18 22:00:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:28,727 INFO L225 Difference]: With dead ends: 42 [2022-03-18 22:00:28,727 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 22:00:28,728 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=113, Invalid=587, Unknown=2, NotChecked=0, Total=702 [2022-03-18 22:00:28,728 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:28,729 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-03-18 22:00:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 22:00:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-03-18 22:00:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:00:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-18 22:00:28,734 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-03-18 22:00:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:28,735 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-18 22:00:28,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 22:00:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-18 22:00:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 22:00:28,735 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:28,736 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:28,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 22:00:28,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:28,937 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1718174257, now seen corresponding path program 3 times [2022-03-18 22:00:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:28,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388347221] [2022-03-18 22:00:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:28,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 22:00:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:00:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:29,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:29,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388347221] [2022-03-18 22:00:29,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388347221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:29,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964493396] [2022-03-18 22:00:29,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:00:29,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:29,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:00:29,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:00:29,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 22:00:29,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:00:29,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 22:00:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:29,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:29,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964493396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:00:29,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:00:29,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-18 22:00:29,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865831293] [2022-03-18 22:00:29,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:29,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 22:00:29,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 22:00:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-18 22:00:29,318 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 22:00:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:29,489 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-18 22:00:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 22:00:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2022-03-18 22:00:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:29,490 INFO L225 Difference]: With dead ends: 60 [2022-03-18 22:00:29,490 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 22:00:29,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-03-18 22:00:29,492 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:29,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 64 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:00:29,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 22:00:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-18 22:00:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:00:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-18 22:00:29,498 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-18 22:00:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:29,507 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-18 22:00:29,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 22:00:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-18 22:00:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 22:00:29,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:29,508 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:29,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 22:00:29,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:29,723 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:29,724 INFO L85 PathProgramCache]: Analyzing trace with hash -770459891, now seen corresponding path program 4 times [2022-03-18 22:00:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:29,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775181254] [2022-03-18 22:00:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 22:00:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:00:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:29,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:29,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775181254] [2022-03-18 22:00:29,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775181254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:29,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379412383] [2022-03-18 22:00:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:00:29,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:29,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:29,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:00:29,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:00:29,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:00:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:00:29,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 22:00:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:30,012 INFO L390 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 15 treesize of output 11 [2022-03-18 22:00:30,576 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 22:00:30,577 INFO L390 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 23 treesize of output 10 [2022-03-18 22:00:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:30,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379412383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:30,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:00:30,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-18 22:00:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566636509] [2022-03-18 22:00:30,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:30,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 22:00:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 22:00:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-18 22:00:30,721 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 22:00:31,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:31,006 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-03-18 22:00:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 22:00:31,007 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-03-18 22:00:31,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:31,008 INFO L225 Difference]: With dead ends: 69 [2022-03-18 22:00:31,008 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 22:00:31,009 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 22:00:31,009 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:31,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2022-03-18 22:00:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 22:00:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 22:00:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 22:00:31,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-03-18 22:00:31,015 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-03-18 22:00:31,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:31,016 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-03-18 22:00:31,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 23 states have internal predecessors, (47), 6 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 22:00:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-03-18 22:00:31,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 22:00:31,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:31,017 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:31,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:00:31,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:31,244 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -550020917, now seen corresponding path program 5 times [2022-03-18 22:00:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325767190] [2022-03-18 22:00:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:31,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:31,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 22:00:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:00:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:31,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:31,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325767190] [2022-03-18 22:00:31,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325767190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:31,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927380994] [2022-03-18 22:00:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:00:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:31,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:31,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:00:31,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:00:31,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-18 22:00:31,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:00:31,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 22:00:31,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:31,535 INFO L390 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 15 treesize of output 11 [2022-03-18 22:00:31,598 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 22:00:31,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-18 22:00:39,778 INFO L390 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 19 treesize of output 7 [2022-03-18 22:00:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:39,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:40,263 INFO L390 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 16 treesize of output 14 [2022-03-18 22:00:40,266 INFO L390 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 28 treesize of output 24 [2022-03-18 22:00:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:40,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927380994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:00:40,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:00:40,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 23 [2022-03-18 22:00:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092961618] [2022-03-18 22:00:40,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:40,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 22:00:40,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:40,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 22:00:40,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=436, Unknown=3, NotChecked=0, Total=506 [2022-03-18 22:00:40,302 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 22:00:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:40,969 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-03-18 22:00:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 22:00:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-03-18 22:00:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:40,971 INFO L225 Difference]: With dead ends: 75 [2022-03-18 22:00:40,971 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 22:00:40,972 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=166, Invalid=1163, Unknown=3, NotChecked=0, Total=1332 [2022-03-18 22:00:40,972 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:40,973 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 101 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 365 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-03-18 22:00:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 22:00:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2022-03-18 22:00:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 22:00:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-03-18 22:00:40,981 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2022-03-18 22:00:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:40,981 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-03-18 22:00:40,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 22:00:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-03-18 22:00:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 22:00:40,982 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:40,982 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:41,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 22:00:41,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:41,204 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:41,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:41,204 INFO L85 PathProgramCache]: Analyzing trace with hash 838435593, now seen corresponding path program 6 times [2022-03-18 22:00:41,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:41,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421472942] [2022-03-18 22:00:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:41,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:41,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:41,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:00:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:41,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:00:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:41,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:41,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421472942] [2022-03-18 22:00:41,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421472942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:41,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968832149] [2022-03-18 22:00:41,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:00:41,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:41,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:41,424 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:00:41,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:00:41,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 22:00:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:00:41,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 22:00:41,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:41,533 INFO L390 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 15 treesize of output 11 [2022-03-18 22:00:41,573 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 22:00:41,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 22:00:41,618 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-18 22:00:41,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-03-18 22:00:49,873 INFO L390 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 19 treesize of output 7 [2022-03-18 22:00:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:00:49,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:00:52,325 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) is different from false [2022-03-18 22:00:52,392 INFO L390 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 16 treesize of output 14 [2022-03-18 22:00:52,393 INFO L390 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 28 treesize of output 24 [2022-03-18 22:00:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2022-03-18 22:00:52,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968832149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:00:52,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:00:52,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 17] total 29 [2022-03-18 22:00:52,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571221062] [2022-03-18 22:00:52,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:00:52,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 22:00:52,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:00:52,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 22:00:52,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=4, NotChecked=52, Total=812 [2022-03-18 22:00:52,429 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 22:00:54,602 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) (<= 3 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 8)) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-18 22:00:56,604 WARN L833 $PredicateComparison]: unable to prove that (and (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) (<= 3 c_main_~i~0) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 8)) 0)) is different from false [2022-03-18 22:00:58,627 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 8))) (and (not (= (+ (* c_main_~i~0 4) c_main_~x~0.offset) .cse0)) (< 3 c_main_~n~0) (forall ((main_~i~0 Int)) (or (forall ((v_ArrVal_119 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) v_ArrVal_119) (+ c_main_~x~0.offset 8)))) (< (+ main_~i~0 1) c_main_~n~0))) (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0))) is different from false [2022-03-18 22:00:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:00:59,211 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-03-18 22:00:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 22:00:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-18 22:00:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:00:59,213 INFO L225 Difference]: With dead ends: 80 [2022-03-18 22:00:59,213 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 22:00:59,215 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=286, Invalid=1884, Unknown=8, NotChecked=372, Total=2550 [2022-03-18 22:00:59,217 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:00:59,217 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 143 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 458 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-18 22:00:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 22:00:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2022-03-18 22:00:59,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:00:59,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-18 22:00:59,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 40 [2022-03-18 22:00:59,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:00:59,241 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-18 22:00:59,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 26 states have internal predecessors, (56), 6 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 22:00:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-18 22:00:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 22:00:59,244 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:00:59,244 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:00:59,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:00:59,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:59,464 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:00:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:00:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash -110930399, now seen corresponding path program 7 times [2022-03-18 22:00:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:00:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942460045] [2022-03-18 22:00:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:00:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:00:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:59,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:00:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:59,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 22:00:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:59,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:00:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:59,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 22:00:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:00:59,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:00:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942460045] [2022-03-18 22:00:59,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942460045] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:00:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726497452] [2022-03-18 22:00:59,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:00:59,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:00:59,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:00:59,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:00:59,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:00:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:00:59,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 22:00:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:00:59,743 INFO L390 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 15 treesize of output 11 [2022-03-18 22:01:12,851 INFO L390 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 19 treesize of output 7 [2022-03-18 22:01:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:01:12,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:15,003 INFO L390 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 16 treesize of output 14 [2022-03-18 22:01:15,005 INFO L390 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 28 treesize of output 24 [2022-03-18 22:01:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:01:15,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726497452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:15,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:15,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 23 [2022-03-18 22:01:15,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319852827] [2022-03-18 22:01:15,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:15,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 22:01:15,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 22:01:15,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=441, Unknown=4, NotChecked=0, Total=506 [2022-03-18 22:01:15,046 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 22:01:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:23,480 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-03-18 22:01:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:01:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-03-18 22:01:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:23,481 INFO L225 Difference]: With dead ends: 86 [2022-03-18 22:01:23,481 INFO L226 Difference]: Without dead ends: 84 [2022-03-18 22:01:23,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=176, Invalid=1376, Unknown=8, NotChecked=0, Total=1560 [2022-03-18 22:01:23,483 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:23,484 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 126 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 483 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-03-18 22:01:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-18 22:01:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2022-03-18 22:01:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 22:01:23,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-03-18 22:01:23,493 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-03-18 22:01:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:23,493 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-03-18 22:01:23,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.272727272727273) internal successors, (50), 20 states have internal predecessors, (50), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 22:01:23,493 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-03-18 22:01:23,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 22:01:23,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:23,494 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:23,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 22:01:23,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 22:01:23,712 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:23,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1930534305, now seen corresponding path program 8 times [2022-03-18 22:01:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:23,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21721684] [2022-03-18 22:01:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:23,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:23,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:01:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:23,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:01:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:23,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:01:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:01:23,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21721684] [2022-03-18 22:01:23,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21721684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940073829] [2022-03-18 22:01:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:01:23,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:23,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:01:23,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 22:01:23,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:01:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 22:01:23,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:24,025 INFO L390 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 15 treesize of output 11 [2022-03-18 22:01:24,084 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 22:01:24,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-18 22:01:37,139 INFO L390 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 19 treesize of output 7 [2022-03-18 22:01:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:01:37,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:01:39,333 INFO L390 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 16 treesize of output 14 [2022-03-18 22:01:39,336 INFO L390 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 28 treesize of output 24 [2022-03-18 22:01:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:01:39,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940073829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:01:39,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:01:39,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 26 [2022-03-18 22:01:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518293129] [2022-03-18 22:01:39,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:01:39,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 22:01:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:01:39,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 22:01:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=570, Unknown=4, NotChecked=0, Total=650 [2022-03-18 22:01:39,384 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 22:01:40,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:01:40,247 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-18 22:01:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 22:01:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 48 [2022-03-18 22:01:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:01:40,248 INFO L225 Difference]: With dead ends: 116 [2022-03-18 22:01:40,248 INFO L226 Difference]: Without dead ends: 114 [2022-03-18 22:01:40,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=188, Invalid=1530, Unknown=4, NotChecked=0, Total=1722 [2022-03-18 22:01:40,250 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:01:40,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 155 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 553 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-03-18 22:01:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-18 22:01:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 83. [2022-03-18 22:01:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 66 states have internal predecessors, (67), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 22:01:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2022-03-18 22:01:40,261 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 48 [2022-03-18 22:01:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:01:40,262 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2022-03-18 22:01:40,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 23 states have internal predecessors, (54), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 22:01:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2022-03-18 22:01:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 22:01:40,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:01:40,263 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:01:40,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 22:01:40,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:40,472 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:01:40,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:01:40,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1776768797, now seen corresponding path program 9 times [2022-03-18 22:01:40,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:01:40,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226279344] [2022-03-18 22:01:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:01:40,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:01:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:40,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:01:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:40,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:01:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:40,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:01:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:40,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:01:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:01:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 22:01:40,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:01:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226279344] [2022-03-18 22:01:40,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226279344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:01:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643922131] [2022-03-18 22:01:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:01:40,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:01:40,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:01:40,692 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:01:40,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 22:01:40,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 22:01:40,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:01:40,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 22:01:40,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:01:40,807 INFO L390 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 15 treesize of output 11 [2022-03-18 22:01:40,838 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 22:01:40,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 22:01:40,852 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 22:01:40,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 22:02:19,323 INFO L390 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 19 treesize of output 7 [2022-03-18 22:02:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 22:02:19,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:02:20,980 WARN L833 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) is different from false [2022-03-18 22:02:22,424 INFO L390 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 16 treesize of output 14 [2022-03-18 22:02:22,426 INFO L390 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 28 treesize of output 24 [2022-03-18 22:02:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 11 not checked. [2022-03-18 22:02:22,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643922131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:02:22,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:02:22,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 17] total 31 [2022-03-18 22:02:22,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628608228] [2022-03-18 22:02:22,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:02:22,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 22:02:22,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:02:22,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 22:02:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=742, Unknown=25, NotChecked=56, Total=930 [2022-03-18 22:02:22,461 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 22:02:23,056 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 4 c_main_~i~0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 12)) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-18 22:02:23,650 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~x~0.offset 12))) (and (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) .cse0) 0) (not (= (+ (* c_main_~i~0 4) c_main_~x~0.offset) .cse0)))) is different from false [2022-03-18 22:02:24,037 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4)) 0) (+ c_main_~x~0.offset 12)) 0)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset 12)) 0) (exists ((main_~i~0 Int)) (= (select (select |c_#memory_int| c_main_~x~0.base) (+ c_main_~x~0.offset (* main_~i~0 4))) 0))) is different from false [2022-03-18 22:02:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:02:26,204 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-03-18 22:02:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 22:02:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-03-18 22:02:26,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:02:26,206 INFO L225 Difference]: With dead ends: 114 [2022-03-18 22:02:26,206 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 22:02:26,207 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=211, Invalid=1580, Unknown=31, NotChecked=340, Total=2162 [2022-03-18 22:02:26,207 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:02:26,207 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 269 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 327 Invalid, 0 Unknown, 172 Unchecked, 0.1s Time] [2022-03-18 22:02:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 22:02:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 99. [2022-03-18 22:02:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 78 states have internal predecessors, (79), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 22:02:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-03-18 22:02:26,221 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 50 [2022-03-18 22:02:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:02:26,221 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-03-18 22:02:26,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 22:02:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-03-18 22:02:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 22:02:26,222 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:02:26,222 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:02:26,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 22:02:26,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 22:02:26,436 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:02:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:02:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash 692034935, now seen corresponding path program 10 times [2022-03-18 22:02:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:02:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24337848] [2022-03-18 22:02:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:02:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:02:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:26,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:02:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 22:02:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 22:02:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:26,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 22:02:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:26,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 22:02:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:02:26,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:02:26,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24337848] [2022-03-18 22:02:26,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24337848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:02:26,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249256029] [2022-03-18 22:02:26,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:02:26,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:02:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:02:26,560 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:02:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 22:02:26,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:02:26,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:02:26,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 22:02:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:02:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:02:26,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:02:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:02:26,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249256029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:02:26,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:02:26,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-18 22:02:26,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907207698] [2022-03-18 22:02:26,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:02:26,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 22:02:26,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:02:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 22:02:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-18 22:02:26,896 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 22:02:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:02:27,134 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-03-18 22:02:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 22:02:27,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 54 [2022-03-18 22:02:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:02:27,135 INFO L225 Difference]: With dead ends: 116 [2022-03-18 22:02:27,135 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 22:02:27,135 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-18 22:02:27,136 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:02:27,136 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:02:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 22:02:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-18 22:02:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 22:02:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-03-18 22:02:27,146 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 54 [2022-03-18 22:02:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:02:27,147 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-03-18 22:02:27,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 22:02:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-03-18 22:02:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 22:02:27,148 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:02:27,148 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:02:27,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 22:02:27,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 22:02:27,370 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:02:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:02:27,370 INFO L85 PathProgramCache]: Analyzing trace with hash 529632181, now seen corresponding path program 11 times [2022-03-18 22:02:27,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:02:27,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999993461] [2022-03-18 22:02:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:02:27,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:02:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:27,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:02:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:02:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:27,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:02:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:02:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:27,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 22:02:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:02:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:02:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:02:27,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999993461] [2022-03-18 22:02:27,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999993461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:02:27,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047679839] [2022-03-18 22:02:27,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:02:27,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:02:27,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:02:27,594 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:02:27,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 22:02:27,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 22:02:27,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:02:27,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 22:02:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:02:27,697 INFO L390 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 15 treesize of output 11 [2022-03-18 22:03:00,038 INFO L390 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 19 treesize of output 7 [2022-03-18 22:03:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:03:00,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:03:02,192 INFO L390 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 16 treesize of output 14 [2022-03-18 22:03:02,194 INFO L390 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 28 treesize of output 24 [2022-03-18 22:03:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:03:02,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047679839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:03:02,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:03:02,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 26 [2022-03-18 22:03:02,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886953916] [2022-03-18 22:03:02,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:03:02,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 22:03:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:03:02,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 22:03:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=575, Unknown=5, NotChecked=0, Total=650 [2022-03-18 22:03:02,245 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 22:03:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:03:10,691 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2022-03-18 22:03:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 22:03:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 56 [2022-03-18 22:03:10,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:03:10,692 INFO L225 Difference]: With dead ends: 104 [2022-03-18 22:03:10,692 INFO L226 Difference]: Without dead ends: 102 [2022-03-18 22:03:10,704 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 106 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=197, Invalid=1774, Unknown=9, NotChecked=0, Total=1980 [2022-03-18 22:03:10,705 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:03:10,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 156 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 613 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-18 22:03:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-18 22:03:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2022-03-18 22:03:10,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:03:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-03-18 22:03:10,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 56 [2022-03-18 22:03:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:03:10,714 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-03-18 22:03:10,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 23 states have internal predecessors, (58), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 22:03:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-03-18 22:03:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 22:03:10,715 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:03:10,716 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:03:10,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 22:03:10,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 22:03:10,927 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:03:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:03:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash -920591757, now seen corresponding path program 12 times [2022-03-18 22:03:10,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:03:10,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448587407] [2022-03-18 22:03:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:03:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:03:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:11,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:03:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:03:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:03:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:03:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:11,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 22:03:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:03:11,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:03:11,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448587407] [2022-03-18 22:03:11,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448587407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:03:11,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99885780] [2022-03-18 22:03:11,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:03:11,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:03:11,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:03:11,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:03:11,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 22:03:11,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 22:03:11,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:03:11,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 22:03:11,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:03:11,289 INFO L390 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 15 treesize of output 11 [2022-03-18 22:03:11,349 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-03-18 22:03:11,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-03-18 22:03:43,715 INFO L390 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 19 treesize of output 7 [2022-03-18 22:03:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:03:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:03:45,907 INFO L390 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 16 treesize of output 14 [2022-03-18 22:03:45,913 INFO L390 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 28 treesize of output 24 [2022-03-18 22:03:45,954 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:03:45,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99885780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:03:45,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:03:45,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 29 [2022-03-18 22:03:45,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553671805] [2022-03-18 22:03:45,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:03:45,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 22:03:45,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:03:45,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 22:03:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=722, Unknown=5, NotChecked=0, Total=812 [2022-03-18 22:03:45,956 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 22:03:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:03:46,423 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2022-03-18 22:03:46,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 22:03:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 58 [2022-03-18 22:03:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:03:46,424 INFO L225 Difference]: With dead ends: 134 [2022-03-18 22:03:46,425 INFO L226 Difference]: Without dead ends: 132 [2022-03-18 22:03:46,425 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 108 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=202, Invalid=1863, Unknown=5, NotChecked=0, Total=2070 [2022-03-18 22:03:46,426 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:03:46,426 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 194 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 597 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2022-03-18 22:03:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-18 22:03:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2022-03-18 22:03:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.05) internal successors, (84), 83 states have internal predecessors, (84), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 22:03:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2022-03-18 22:03:46,444 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 58 [2022-03-18 22:03:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:03:46,444 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2022-03-18 22:03:46,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 22:03:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2022-03-18 22:03:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 22:03:46,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:03:46,445 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:03:46,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 22:03:46,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 22:03:46,650 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:03:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:03:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1278575025, now seen corresponding path program 13 times [2022-03-18 22:03:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:03:46,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85225433] [2022-03-18 22:03:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:03:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:03:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:03:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:03:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 22:03:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 22:03:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 22:03:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 81 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:03:46,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:03:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85225433] [2022-03-18 22:03:46,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85225433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:03:46,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353170987] [2022-03-18 22:03:46,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:03:46,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:03:46,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:03:46,888 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:03:46,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 22:03:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:03:46,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 22:03:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:03:47,010 INFO L390 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 15 treesize of output 11 [2022-03-18 22:03:47,048 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 22:03:47,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 22:03:47,086 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 22:03:47,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 22:04:19,445 INFO L390 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 19 treesize of output 7 [2022-03-18 22:04:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 88 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 22:04:19,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:04:21,668 INFO L390 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 16 treesize of output 14 [2022-03-18 22:04:21,669 INFO L390 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 28 treesize of output 24 [2022-03-18 22:04:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 8 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:04:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353170987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:04:21,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:04:21,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 30 [2022-03-18 22:04:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488331566] [2022-03-18 22:04:21,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:04:21,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 22:04:21,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:04:21,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 22:04:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=773, Unknown=5, NotChecked=0, Total=870 [2022-03-18 22:04:21,711 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 22:04:22,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:04:22,162 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-03-18 22:04:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 22:04:22,162 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 60 [2022-03-18 22:04:22,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:04:22,163 INFO L225 Difference]: With dead ends: 128 [2022-03-18 22:04:22,163 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 22:04:22,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 112 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=243, Invalid=2202, Unknown=5, NotChecked=0, Total=2450 [2022-03-18 22:04:22,166 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:04:22,166 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 150 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 529 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-03-18 22:04:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 22:04:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2022-03-18 22:04:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 92 states have internal predecessors, (93), 16 states have call successors, (16), 12 states have call predecessors, (16), 11 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 22:04:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2022-03-18 22:04:22,181 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 60 [2022-03-18 22:04:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:04:22,181 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2022-03-18 22:04:22,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 27 states have internal predecessors, (66), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 22:04:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2022-03-18 22:04:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 22:04:22,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:04:22,182 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:04:22,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 22:04:22,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:04:22,383 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:04:22,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:04:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash 603520779, now seen corresponding path program 14 times [2022-03-18 22:04:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:04:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160686306] [2022-03-18 22:04:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:04:22,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:04:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:04:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 22:04:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 22:04:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 22:04:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 22:04:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 22:04:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:04:22,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:04:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160686306] [2022-03-18 22:04:22,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160686306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:04:22,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995262232] [2022-03-18 22:04:22,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:04:22,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:04:22,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:04:22,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:04:22,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 22:04:22,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:04:22,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:04:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 22:04:22,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:04:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:04:22,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:04:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:04:22,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995262232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:04:22,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:04:22,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-03-18 22:04:22,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099723807] [2022-03-18 22:04:22,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:04:22,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 22:04:22,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:04:22,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 22:04:22,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-18 22:04:22,960 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 22:04:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:04:23,209 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2022-03-18 22:04:23,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 22:04:23,210 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 64 [2022-03-18 22:04:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:04:23,211 INFO L225 Difference]: With dead ends: 134 [2022-03-18 22:04:23,211 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 22:04:23,212 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 22:04:23,212 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:04:23,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 55 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:04:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 22:04:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-03-18 22:04:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.04) internal successors, (78), 77 states have internal predecessors, (78), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 22:04:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-18 22:04:23,234 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 64 [2022-03-18 22:04:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:04:23,234 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-18 22:04:23,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 22:04:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-18 22:04:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 22:04:23,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:04:23,235 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:04:23,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 22:04:23,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 22:04:23,436 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:04:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:04:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash -694372407, now seen corresponding path program 15 times [2022-03-18 22:04:23,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:04:23,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717386354] [2022-03-18 22:04:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:04:23,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:04:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:04:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 22:04:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 22:04:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 22:04:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 22:04:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 22:04:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:04:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:04:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717386354] [2022-03-18 22:04:23,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717386354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:04:23,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704159969] [2022-03-18 22:04:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:04:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:04:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:04:23,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:04:23,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 22:04:23,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-18 22:04:23,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:04:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 22:04:23,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:04:23,863 INFO L390 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 15 treesize of output 11 [2022-03-18 22:04:24,894 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 22:04:24,894 INFO L390 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 23 treesize of output 10 [2022-03-18 22:04:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:04:24,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:04:25,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704159969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:04:25,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 22:04:25,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-03-18 22:04:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714915730] [2022-03-18 22:04:25,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 22:04:25,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 22:04:25,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:04:25,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 22:04:25,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 22:04:25,257 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 22:04:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:04:25,792 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2022-03-18 22:04:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 22:04:25,792 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 66 [2022-03-18 22:04:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:04:25,793 INFO L225 Difference]: With dead ends: 123 [2022-03-18 22:04:25,793 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 22:04:25,794 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=363, Invalid=3419, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 22:04:25,794 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:04:25,794 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 387 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 148 Unchecked, 0.1s Time] [2022-03-18 22:04:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 22:04:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 22:04:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 22:04:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-03-18 22:04:25,801 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2022-03-18 22:04:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:04:25,801 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-03-18 22:04:25,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 35 states have internal predecessors, (77), 12 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 22:04:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-03-18 22:04:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 22:04:25,802 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:04:25,802 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:04:25,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 22:04:26,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 22:04:26,003 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:04:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:04:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1865758983, now seen corresponding path program 16 times [2022-03-18 22:04:26,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:04:26,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891606549] [2022-03-18 22:04:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:04:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:04:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:04:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 22:04:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 22:04:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 22:04:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 22:04:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 22:04:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:04:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 22:04:26,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:04:26,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891606549] [2022-03-18 22:04:26,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891606549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:04:26,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634383779] [2022-03-18 22:04:26,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:04:26,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:04:26,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:04:26,268 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:04:26,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 22:04:26,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:04:26,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:04:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 22:04:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:04:26,462 INFO L390 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 15 treesize of output 11 [2022-03-18 22:04:26,515 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-18 22:04:26,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-03-18 22:04:26,587 INFO L356 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2022-03-18 22:04:26,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2022-03-18 22:04:26,674 INFO L356 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2022-03-18 22:04:26,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2022-03-18 22:04:26,839 INFO L356 Elim1Store]: treesize reduction 258, result has 15.7 percent of original size [2022-03-18 22:04:26,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 71 [2022-03-18 22:06:13,910 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:06:22,600 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:06:31,050 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:07:19,657 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:07:32,492 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:07:43,060 WARN L232 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:08:39,796 WARN L232 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:08:54,804 WARN L232 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:09:09,463 WARN L232 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 176 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:09:14,074 INFO L356 Elim1Store]: treesize reduction 9518, result has 0.0 percent of original size [2022-03-18 22:09:14,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 31 select indices, 31 select index equivalence classes, 0 disjoint index pairs (out of 465 index pairs), introduced 31 new quantified variables, introduced 465 case distinctions, treesize of input 358 treesize of output 97 [2022-03-18 22:09:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 32 proven. 109 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:09:14,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:09:15,078 INFO L390 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 16 treesize of output 14 [2022-03-18 22:09:15,080 INFO L390 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 28 treesize of output 24 [2022-03-18 22:09:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 22:09:15,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634383779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:09:15,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:09:15,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 35, 17] total 65 [2022-03-18 22:09:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284416366] [2022-03-18 22:09:15,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:09:15,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 22:09:15,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:09:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 22:09:15,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=3694, Unknown=93, NotChecked=0, Total=4160 [2022-03-18 22:09:15,258 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 65 states, 64 states have (on average 1.859375) internal successors, (119), 62 states have internal predecessors, (119), 17 states have call successors, (20), 9 states have call predecessors, (20), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 22:12:59,587 WARN L232 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 92 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:13:19,717 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:13:33,846 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:13:56,065 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:14:10,194 WARN L232 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:14:26,323 WARN L232 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 22:14:42,245 WARN L230 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-03-18 22:14:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 22:14:42,248 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 589.4s TimeCoverageRelationStatistics Valid=830, Invalid=9059, Unknown=211, NotChecked=0, Total=10100 [2022-03-18 22:14:42,248 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:14:42,248 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 361 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 447 Invalid, 0 Unknown, 274 Unchecked, 0.2s Time] [2022-03-18 22:14:42,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-03-18 22:14:42,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-18 22:14:42,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:14:42,450 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:197) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:164) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:852) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:769) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:470) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:421) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 56 more [2022-03-18 22:14:42,453 INFO L158 Benchmark]: Toolchain (without parser) took 861643.25ms. Allocated memory was 198.2MB in the beginning and 238.0MB in the end (delta: 39.8MB). Free memory was 150.2MB in the beginning and 180.0MB in the end (delta: -29.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 22:14:42,454 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 198.2MB. Free memory is still 166.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 22:14:42,454 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.12ms. Allocated memory is still 198.2MB. Free memory was 150.0MB in the beginning and 177.0MB in the end (delta: -27.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 22:14:42,454 INFO L158 Benchmark]: Boogie Preprocessor took 36.03ms. Allocated memory is still 198.2MB. Free memory was 177.0MB in the beginning and 175.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 22:14:42,454 INFO L158 Benchmark]: RCFGBuilder took 223.42ms. Allocated memory is still 198.2MB. Free memory was 175.6MB in the beginning and 165.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 22:14:42,454 INFO L158 Benchmark]: IcfgTransformer took 20.38ms. Allocated memory is still 198.2MB. Free memory was 165.1MB in the beginning and 163.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 22:14:42,455 INFO L158 Benchmark]: TraceAbstraction took 861151.92ms. Allocated memory was 198.2MB in the beginning and 238.0MB in the end (delta: 39.8MB). Free memory was 163.3MB in the beginning and 180.0MB in the end (delta: -16.7MB). Peak memory consumption was 24.2MB. Max. memory is 8.0GB. [2022-03-18 22:14:42,456 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 198.2MB. Free memory is still 166.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 206.12ms. Allocated memory is still 198.2MB. Free memory was 150.0MB in the beginning and 177.0MB in the end (delta: -27.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.03ms. Allocated memory is still 198.2MB. Free memory was 177.0MB in the beginning and 175.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 223.42ms. Allocated memory is still 198.2MB. Free memory was 175.6MB in the beginning and 165.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 20.38ms. Allocated memory is still 198.2MB. Free memory was 165.1MB in the beginning and 163.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 861151.92ms. Allocated memory was 198.2MB in the beginning and 238.0MB in the end (delta: 39.8MB). Free memory was 163.3MB in the beginning and 180.0MB in the end (delta: -16.7MB). Peak memory consumption was 24.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...