/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/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 04:49:15,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 04:49:15,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 04:49:15,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 04:49:15,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 04:49:15,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 04:49:15,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 04:49:15,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 04:49:15,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 04:49:15,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 04:49:15,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 04:49:15,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 04:49:15,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 04:49:15,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 04:49:15,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 04:49:15,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 04:49:15,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 04:49:15,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 04:49:15,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 04:49:15,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 04:49:15,097 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 04:49:15,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 04:49:15,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 04:49:15,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 04:49:15,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 04:49:15,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 04:49:15,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 04:49:15,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 04:49:15,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 04:49:15,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 04:49:15,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 04:49:15,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 04:49:15,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 04:49:15,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 04:49:15,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 04:49:15,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 04:49:15,149 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 04:49:15,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 04:49:15,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 04:49:15,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 04:49:15,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 04:49:15,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 04:49:15,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 04:49:15,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 04:49:15,151 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 04:49:15,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 04:49:15,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 04:49:15,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 04:49:15,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 04:49:15,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:15,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 04:49:15,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 04:49:15,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 04:49:15,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 04:49:15,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 04:49:15,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 04:49:15,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 04:49:15,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 04:49:15,153 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 04:49:15,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 04:49:15,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 04:49:15,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 04:49:15,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 04:49:15,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 04:49:15,423 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 04:49:15,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2022-04-05 04:49:15,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83e0e69c/f6cae375d23943d3bcc881355143283e/FLAG1a1b2fea7 [2022-04-05 04:49:15,866 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 04:49:15,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2022-04-05 04:49:15,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83e0e69c/f6cae375d23943d3bcc881355143283e/FLAG1a1b2fea7 [2022-04-05 04:49:15,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d83e0e69c/f6cae375d23943d3bcc881355143283e [2022-04-05 04:49:15,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 04:49:15,892 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 04:49:15,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:15,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 04:49:15,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 04:49:15,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c297341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:15, skipping insertion in model container [2022-04-05 04:49:15,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 04:49:15" (1/1) ... [2022-04-05 04:49:15,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 04:49:15,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 04:49:16,133 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-04-05 04:49:16,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:16,161 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 04:49:16,172 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2022-04-05 04:49:16,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 04:49:16,200 INFO L208 MainTranslator]: Completed translation [2022-04-05 04:49:16,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16 WrapperNode [2022-04-05 04:49:16,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 04:49:16,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 04:49:16,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 04:49:16,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 04:49:16,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 04:49:16,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 04:49:16,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 04:49:16,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 04:49:16,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 04:49:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:16,289 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) [2022-04-05 04:49:16,304 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 [2022-04-05 04:49:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 04:49:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 04:49:16,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 04:49:16,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 04:49:16,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 04:49:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 04:49:16,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 04:49:16,330 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 04:49:16,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 04:49:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 04:49:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 04:49:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 04:49:16,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 04:49:16,384 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 04:49:16,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 04:49:16,543 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 04:49:16,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 04:49:16,548 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-04-05 04:49:16,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:16 BoogieIcfgContainer [2022-04-05 04:49:16,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 04:49:16,550 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 04:49:16,550 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 04:49:16,561 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 04:49:16,563 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:16" (1/1) ... [2022-04-05 04:49:16,565 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 04:49:16,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:16 BasicIcfg [2022-04-05 04:49:16,579 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 04:49:16,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 04:49:16,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 04:49:16,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 04:49:16,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 04:49:15" (1/4) ... [2022-04-05 04:49:16,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817e0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:16, skipping insertion in model container [2022-04-05 04:49:16,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 04:49:16" (2/4) ... [2022-04-05 04:49:16,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817e0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 04:49:16, skipping insertion in model container [2022-04-05 04:49:16,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 04:49:16" (3/4) ... [2022-04-05 04:49:16,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1817e0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 04:49:16, skipping insertion in model container [2022-04-05 04:49:16,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 04:49:16" (4/4) ... [2022-04-05 04:49:16,585 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.cqvasr [2022-04-05 04:49:16,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 04:49:16,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 04:49:16,650 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 04:49:16,656 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 [2022-04-05 04:49:16,657 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 04:49:16,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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) [2022-04-05 04:49:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 04:49:16,676 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:16,676 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:16,677 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:16,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:16,684 INFO L85 PathProgramCache]: Analyzing trace with hash -189909079, now seen corresponding path program 1 times [2022-04-05 04:49:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:16,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097784595] [2022-04-05 04:49:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:16,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097784595] [2022-04-05 04:49:16,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097784595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:16,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:16,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 04:49:16,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442132377] [2022-04-05 04:49:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:16,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 04:49:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 04:49:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 04:49:16,924 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-04-05 04:49:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:16,954 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-04-05 04:49:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 04:49:16,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-04-05 04:49:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:16,962 INFO L225 Difference]: With dead ends: 54 [2022-04-05 04:49:16,962 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 04:49:16,964 INFO L912 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 [2022-04-05 04:49:16,968 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 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 [2022-04-05 04:49:16,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 04:49:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-05 04:49:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-04-05 04:49:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-05 04:49:17,004 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-04-05 04:49:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:17,004 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-05 04:49:17,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-04-05 04:49:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-05 04:49:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 04:49:17,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:17,007 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:17,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 04:49:17,008 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:17,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1109859861, now seen corresponding path program 1 times [2022-04-05 04:49:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46048384] [2022-04-05 04:49:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:17,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46048384] [2022-04-05 04:49:17,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46048384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:17,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:17,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 04:49:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282163483] [2022-04-05 04:49:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:17,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 04:49:17,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 04:49:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 04:49:17,152 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-04-05 04:49:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:17,316 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-04-05 04:49:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 04:49:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2022-04-05 04:49:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:17,317 INFO L225 Difference]: With dead ends: 49 [2022-04-05 04:49:17,317 INFO L226 Difference]: Without dead ends: 28 [2022-04-05 04:49:17,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:49:17,319 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:17,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-05 04:49:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-05 04:49:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-04-05 04:49:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-05 04:49:17,325 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2022-04-05 04:49:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:17,325 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-05 04:49:17,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-04-05 04:49:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-05 04:49:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 04:49:17,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:17,326 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:17,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 04:49:17,326 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1012960919, now seen corresponding path program 1 times [2022-04-05 04:49:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:17,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408941047] [2022-04-05 04:49:17,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:17,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:17,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:17,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408941047] [2022-04-05 04:49:17,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408941047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:17,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616072553] [2022-04-05 04:49:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:17,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:17,561 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) [2022-04-05 04:49:17,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 04:49:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:17,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 04:49:17,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:17,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 04:49:17,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616072553] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:17,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 04:49:17,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-04-05 04:49:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784207856] [2022-04-05 04:49:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:17,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 04:49:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 04:49:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-05 04:49:17,813 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:17,887 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-05 04:49:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 04:49:17,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 17 [2022-04-05 04:49:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:17,889 INFO L225 Difference]: With dead ends: 45 [2022-04-05 04:49:17,889 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 04:49:17,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-05 04:49:17,894 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:17,896 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 04:49:17,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 04:49:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-04-05 04:49:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2022-04-05 04:49:17,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-05 04:49:17,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2022-04-05 04:49:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:17,905 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-05 04:49:17,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-05 04:49:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:49:17,906 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:17,907 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:17,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:18,127 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 [2022-04-05 04:49:18,128 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -768849603, now seen corresponding path program 1 times [2022-04-05 04:49:18,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:18,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825964406] [2022-04-05 04:49:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:18,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:49:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:18,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825964406] [2022-04-05 04:49:18,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825964406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 04:49:18,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 04:49:18,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 04:49:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919031777] [2022-04-05 04:49:18,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:18,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 04:49:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:18,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 04:49:18,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-05 04:49:18,225 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-04-05 04:49:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:18,337 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-04-05 04:49:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 04:49:18,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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 23 [2022-04-05 04:49:18,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:18,339 INFO L225 Difference]: With dead ends: 55 [2022-04-05 04:49:18,339 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 04:49:18,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-04-05 04:49:18,340 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:18,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 40 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 04:49:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-04-05 04:49:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2022-04-05 04:49:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-05 04:49:18,346 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-04-05 04:49:18,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:18,347 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-05 04:49:18,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-04-05 04:49:18,347 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-05 04:49:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 04:49:18,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:18,348 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:18,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 04:49:18,348 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1028101756, now seen corresponding path program 1 times [2022-04-05 04:49:18,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:18,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397230360] [2022-04-05 04:49:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:18,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397230360] [2022-04-05 04:49:18,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397230360] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58895742] [2022-04-05 04:49:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:18,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:18,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:18,470 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) [2022-04-05 04:49:18,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 04:49:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 04:49:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:18,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58895742] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:18,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:18,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-05 04:49:18,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699983353] [2022-04-05 04:49:18,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:18,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 04:49:18,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:18,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 04:49:18,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:49:18,751 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:18,939 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-04-05 04:49:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 04:49:18,940 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-05 04:49:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:18,942 INFO L225 Difference]: With dead ends: 59 [2022-04-05 04:49:18,942 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 04:49:18,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-04-05 04:49:18,944 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:18,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 55 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:49:18,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 04:49:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2022-04-05 04:49:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2022-04-05 04:49:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-05 04:49:18,954 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-04-05 04:49:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:18,954 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-05 04:49:18,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-05 04:49:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 04:49:18,955 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:18,956 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:18,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:19,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:19,164 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:19,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1354614778, now seen corresponding path program 2 times [2022-04-05 04:49:19,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:19,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470008304] [2022-04-05 04:49:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:19,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:19,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:19,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470008304] [2022-04-05 04:49:19,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470008304] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706949727] [2022-04-05 04:49:19,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:49:19,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:19,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:19,603 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) [2022-04-05 04:49:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 04:49:19,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:49:19,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:49:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 04:49:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:19,702 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 [2022-04-05 04:49:19,739 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 [2022-04-05 04:49:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:49:19,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-05 04:49:19,957 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:49:19,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:49:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:19,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:22,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706949727] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:22,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-05 04:49:22,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [16, 15] total 30 [2022-04-05 04:49:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249575279] [2022-04-05 04:49:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 04:49:22,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 04:49:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 04:49:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=724, Unknown=1, NotChecked=0, Total=870 [2022-04-05 04:49:22,343 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:49:22,431 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-04-05 04:49:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 04:49:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 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 25 [2022-04-05 04:49:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:49:22,432 INFO L225 Difference]: With dead ends: 49 [2022-04-05 04:49:22,432 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 04:49:22,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=171, Invalid=950, Unknown=1, NotChecked=0, Total=1122 [2022-04-05 04:49:22,434 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 04:49:22,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 153 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-04-05 04:49:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 04:49:22,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-04-05 04:49:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 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) [2022-04-05 04:49:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-04-05 04:49:22,442 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 25 [2022-04-05 04:49:22,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:49:22,442 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-04-05 04:49:22,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-04-05 04:49:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:49:22,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:49:22,443 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:49:22,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 04:49:22,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:22,665 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:49:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:49:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1272155915, now seen corresponding path program 1 times [2022-04-05 04:49:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:49:22,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096964150] [2022-04-05 04:49:22,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:49:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:49:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:49:23,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:49:23,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096964150] [2022-04-05 04:49:23,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096964150] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:49:23,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503142562] [2022-04-05 04:49:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:49:23,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:49:23,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:49:23,091 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) [2022-04-05 04:49:23,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 04:49:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:49:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 04:49:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:49:23,285 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-05 04:49:23,285 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 39 treesize of output 30 [2022-04-05 04:49:23,477 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-05 04:49:23,478 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 48 treesize of output 31 [2022-04-05 04:49:23,679 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-04-05 04:49:23,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-04-05 04:49:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:23,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:49:24,105 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 69 treesize of output 61 [2022-04-05 04:49:24,122 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-04-05 04:49:24,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 347 [2022-04-05 04:49:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:49:25,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503142562] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:49:25,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:49:25,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 12] total 36 [2022-04-05 04:49:25,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173981256] [2022-04-05 04:49:25,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:49:25,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 04:49:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:49:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 04:49:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1124, Unknown=1, NotChecked=0, Total=1260 [2022-04-05 04:49:25,091 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:49:40,391 WARN L232 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:49:52,508 WARN L232 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:50:08,194 WARN L232 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:50:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:50:15,634 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2022-04-05 04:50:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-05 04:50:15,634 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-05 04:50:15,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:50:15,637 INFO L225 Difference]: With dead ends: 147 [2022-04-05 04:50:15,638 INFO L226 Difference]: Without dead ends: 145 [2022-04-05 04:50:15,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2462 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=847, Invalid=7338, Unknown=5, NotChecked=0, Total=8190 [2022-04-05 04:50:15,641 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 04:50:15,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 112 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 629 Invalid, 0 Unknown, 503 Unchecked, 0.4s Time] [2022-04-05 04:50:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-05 04:50:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 62. [2022-04-05 04:50:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 55 states have internal predecessors, (73), 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) [2022-04-05 04:50:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-04-05 04:50:15,656 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 28 [2022-04-05 04:50:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:50:15,656 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-04-05 04:50:15,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:50:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-04-05 04:50:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 04:50:15,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:50:15,657 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:50:15,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 04:50:15,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:15,878 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:50:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:50:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 524795444, now seen corresponding path program 1 times [2022-04-05 04:50:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:50:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846752959] [2022-04-05 04:50:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:50:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:50:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:50:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:50:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846752959] [2022-04-05 04:50:15,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846752959] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:50:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294679752] [2022-04-05 04:50:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:15,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:50:15,955 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) [2022-04-05 04:50:15,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 04:50:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 04:50:16,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:50:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:50:16,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:50:16,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294679752] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:50:16,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:50:16,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-04-05 04:50:16,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271396436] [2022-04-05 04:50:16,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:50:16,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 04:50:16,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:50:16,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 04:50:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-04-05 04:50:16,118 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:50:16,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:50:16,325 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2022-04-05 04:50:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 04:50:16,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-05 04:50:16,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:50:16,327 INFO L225 Difference]: With dead ends: 113 [2022-04-05 04:50:16,327 INFO L226 Difference]: Without dead ends: 76 [2022-04-05 04:50:16,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-04-05 04:50:16,328 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 61 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:50:16,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 50 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:50:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-05 04:50:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-04-05 04:50:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 48 states have internal predecessors, (58), 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) [2022-04-05 04:50:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-04-05 04:50:16,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 28 [2022-04-05 04:50:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:50:16,341 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-04-05 04:50:16,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:50:16,342 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-04-05 04:50:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 04:50:16,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:50:16,347 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:50:16,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 04:50:16,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:16,571 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:50:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:50:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash -551964914, now seen corresponding path program 1 times [2022-04-05 04:50:16,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:50:16,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679629230] [2022-04-05 04:50:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:16,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:50:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:16,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:50:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:50:16,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:50:16,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679629230] [2022-04-05 04:50:16,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679629230] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:50:16,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418070430] [2022-04-05 04:50:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:16,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:16,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:50:16,638 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) [2022-04-05 04:50:16,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 04:50:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:16,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 04:50:16,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:50:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:50:16,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 04:50:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418070430] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:50:16,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:50:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-04-05 04:50:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738852163] [2022-04-05 04:50:16,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:50:16,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 04:50:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:50:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 04:50:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-05 04:50:16,806 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:50:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:50:17,058 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2022-04-05 04:50:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 04:50:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-05 04:50:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:50:17,060 INFO L225 Difference]: With dead ends: 118 [2022-04-05 04:50:17,060 INFO L226 Difference]: Without dead ends: 87 [2022-04-05 04:50:17,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-04-05 04:50:17,061 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 04:50:17,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 43 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 04:50:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-05 04:50:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2022-04-05 04:50:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-04-05 04:50:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-04-05 04:50:17,070 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 31 [2022-04-05 04:50:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:50:17,070 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-04-05 04:50:17,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:50:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-04-05 04:50:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 04:50:17,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:50:17,071 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:50:17,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 04:50:17,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:17,291 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:50:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:50:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 567979469, now seen corresponding path program 1 times [2022-04-05 04:50:17,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:50:17,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189482779] [2022-04-05 04:50:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:50:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:17,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:50:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:17,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 04:50:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:50:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:50:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189482779] [2022-04-05 04:50:17,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189482779] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:50:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775792575] [2022-04-05 04:50:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:17,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:17,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:50:17,405 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) [2022-04-05 04:50:17,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 04:50:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 04:50:17,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:50:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:50:17,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:50:17,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775792575] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:50:17,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:50:17,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-04-05 04:50:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880256847] [2022-04-05 04:50:17,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:50:17,764 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 04:50:17,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:50:17,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 04:50:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-05 04:50:17,764 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:50:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:50:18,081 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2022-04-05 04:50:18,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 04:50:18,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-04-05 04:50:18,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:50:18,083 INFO L225 Difference]: With dead ends: 144 [2022-04-05 04:50:18,083 INFO L226 Difference]: Without dead ends: 85 [2022-04-05 04:50:18,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-04-05 04:50:18,084 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 89 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 04:50:18,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 69 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 04:50:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-05 04:50:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2022-04-05 04:50:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 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) [2022-04-05 04:50:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-04-05 04:50:18,099 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 33 [2022-04-05 04:50:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:50:18,099 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-04-05 04:50:18,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 04:50:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-04-05 04:50:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 04:50:18,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:50:18,104 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:50:18,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 04:50:18,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:18,327 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:50:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:50:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -954574653, now seen corresponding path program 2 times [2022-04-05 04:50:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:50:18,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324167159] [2022-04-05 04:50:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:18,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:50:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:50:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:50:18,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:50:18,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324167159] [2022-04-05 04:50:18,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324167159] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:50:18,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432552255] [2022-04-05 04:50:18,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:50:18,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:18,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:50:18,651 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) [2022-04-05 04:50:18,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 04:50:18,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:50:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:50:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 04:50:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:50:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:50:18,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-05 04:50:19,015 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:50:19,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:50:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:50:19,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:19,192 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 41 treesize of output 35 [2022-04-05 04:50:19,209 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-04-05 04:50:19,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 90 [2022-04-05 04:50:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:50:19,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432552255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:50:19,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:50:19,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 32 [2022-04-05 04:50:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835956991] [2022-04-05 04:50:19,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:50:19,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 04:50:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:50:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 04:50:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-04-05 04:50:19,364 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-04-05 04:50:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:50:20,717 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-04-05 04:50:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-05 04:50:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 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 36 [2022-04-05 04:50:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:50:20,719 INFO L225 Difference]: With dead ends: 140 [2022-04-05 04:50:20,719 INFO L226 Difference]: Without dead ends: 138 [2022-04-05 04:50:20,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=786, Invalid=4044, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 04:50:20,721 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 235 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 04:50:20,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 90 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 778 Invalid, 0 Unknown, 149 Unchecked, 0.5s Time] [2022-04-05 04:50:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-05 04:50:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 77. [2022-04-05 04:50:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 70 states have internal predecessors, (83), 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) [2022-04-05 04:50:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-04-05 04:50:20,732 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 36 [2022-04-05 04:50:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:50:20,732 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-04-05 04:50:20,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 29 states have internal predecessors, (72), 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) [2022-04-05 04:50:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-04-05 04:50:20,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 04:50:20,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:50:20,733 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:50:20,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 04:50:20,946 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,SelfDestructingSolverStorable10 [2022-04-05 04:50:20,946 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:50:20,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:50:20,947 INFO L85 PathProgramCache]: Analyzing trace with hash -392015670, now seen corresponding path program 2 times [2022-04-05 04:50:20,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:50:20,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075956503] [2022-04-05 04:50:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:50:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:50:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:50:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:50:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 04:50:21,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:50:21,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075956503] [2022-04-05 04:50:21,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075956503] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:50:21,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263312606] [2022-04-05 04:50:21,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:50:21,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:50:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:50:21,394 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) [2022-04-05 04:50:21,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 04:50:21,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:50:21,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:50:21,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 04:50:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:50:21,615 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-05 04:50:21,615 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 40 treesize of output 30 [2022-04-05 04:50:21,794 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-04-05 04:50:21,794 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 49 treesize of output 30 [2022-04-05 04:50:21,984 INFO L356 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2022-04-05 04:50:21,985 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 32 treesize of output 34 [2022-04-05 04:50:22,098 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-04-05 04:50:22,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2022-04-05 04:50:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:50:22,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:50:33,006 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 85 treesize of output 77 [2022-04-05 04:50:33,035 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-04-05 04:50:33,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21667 treesize of output 20897 [2022-04-05 04:57:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 11 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:57:21,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263312606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:57:21,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:57:21,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 46 [2022-04-05 04:57:21,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157780503] [2022-04-05 04:57:21,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:57:21,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-05 04:57:21,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:57:21,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-05 04:57:21,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1837, Unknown=6, NotChecked=0, Total=2070 [2022-04-05 04:57:21,849 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 46 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:57:32,570 WARN L232 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:57:44,245 WARN L232 SmtUtils]: Spent 9.04s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:57:57,695 WARN L232 SmtUtils]: Spent 13.13s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 04:57:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:57:57,858 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-04-05 04:57:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-05 04:57:57,858 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-05 04:57:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:57:57,860 INFO L225 Difference]: With dead ends: 103 [2022-04-05 04:57:57,860 INFO L226 Difference]: Without dead ends: 101 [2022-04-05 04:57:57,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 56.1s TimeCoverageRelationStatistics Valid=713, Invalid=5443, Unknown=6, NotChecked=0, Total=6162 [2022-04-05 04:57:57,863 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 04:57:57,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 126 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 724 Invalid, 0 Unknown, 464 Unchecked, 0.5s Time] [2022-04-05 04:57:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-05 04:57:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-04-05 04:57:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 70 states have internal predecessors, (83), 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) [2022-04-05 04:57:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-04-05 04:57:57,874 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 36 [2022-04-05 04:57:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:57:57,874 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-04-05 04:57:57,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.75) internal successors, (77), 43 states have internal predecessors, (77), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:57:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-04-05 04:57:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 04:57:57,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:57:57,875 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:57:57,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 04:57:58,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:57:58,080 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:57:58,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:57:58,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1268602014, now seen corresponding path program 2 times [2022-04-05 04:57:58,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:57:58,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876646444] [2022-04-05 04:57:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:57:58,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:57:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:57:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:57:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:57:58,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-05 04:57:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:57:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:57:58,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:57:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876646444] [2022-04-05 04:57:58,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876646444] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:57:58,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841577613] [2022-04-05 04:57:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 04:57:58,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:57:58,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:57:58,366 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) [2022-04-05 04:57:58,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 04:57:58,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 04:57:58,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:57:58,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 04:57:58,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:57:58,583 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 16 treesize of output 12 [2022-04-05 04:57:58,672 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-04-05 04:57:58,672 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 23 treesize of output 22 [2022-04-05 04:58:00,709 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_1|))))) is different from true [2022-04-05 04:58:00,776 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-05 04:58:00,776 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 34 treesize of output 10 [2022-04-05 04:58:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-04-05 04:58:00,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:58:01,176 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 67 treesize of output 61 [2022-04-05 04:58:01,207 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-04-05 04:58:01,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1699 treesize of output 1580 [2022-04-05 04:58:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:58:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841577613] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:58:02,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:58:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 32 [2022-04-05 04:58:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604269565] [2022-04-05 04:58:02,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:58:02,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 04:58:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:58:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 04:58:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=829, Unknown=1, NotChecked=58, Total=992 [2022-04-05 04:58:02,123 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-04-05 04:58:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:58:37,266 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2022-04-05 04:58:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 04:58:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 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 41 [2022-04-05 04:58:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:58:37,267 INFO L225 Difference]: With dead ends: 132 [2022-04-05 04:58:37,267 INFO L226 Difference]: Without dead ends: 130 [2022-04-05 04:58:37,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=318, Invalid=2531, Unknown=17, NotChecked=104, Total=2970 [2022-04-05 04:58:37,269 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 04:58:37,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 170 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 826 Invalid, 0 Unknown, 351 Unchecked, 0.5s Time] [2022-04-05 04:58:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-05 04:58:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2022-04-05 04:58:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 101 states have internal predecessors, (120), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 04:58:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-04-05 04:58:37,293 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 41 [2022-04-05 04:58:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:58:37,294 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-04-05 04:58:37,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-04-05 04:58:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-04-05 04:58:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 04:58:37,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:58:37,295 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:58:37,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 04:58:37,515 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,SelfDestructingSolverStorable12 [2022-04-05 04:58:37,515 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:58:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:58:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -993265584, now seen corresponding path program 3 times [2022-04-05 04:58:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:58:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555724268] [2022-04-05 04:58:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:58:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:58:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:37,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:58:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:58:37,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:58:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555724268] [2022-04-05 04:58:37,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555724268] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:58:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629840539] [2022-04-05 04:58:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 04:58:37,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:58:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:58:37,674 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) [2022-04-05 04:58:37,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 04:58:37,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-04-05 04:58:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:58:37,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 04:58:37,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:58:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:58:38,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:58:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 04:58:38,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629840539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:58:38,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:58:38,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2022-04-05 04:58:38,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623997795] [2022-04-05 04:58:38,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:58:38,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 04:58:38,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:58:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 04:58:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-05 04:58:38,304 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:58:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:58:38,803 INFO L93 Difference]: Finished difference Result 245 states and 293 transitions. [2022-04-05 04:58:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 04:58:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-05 04:58:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:58:38,805 INFO L225 Difference]: With dead ends: 245 [2022-04-05 04:58:38,805 INFO L226 Difference]: Without dead ends: 178 [2022-04-05 04:58:38,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-05 04:58:38,807 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 04:58:38,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 76 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 04:58:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-05 04:58:38,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 139. [2022-04-05 04:58:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.204724409448819) internal successors, (153), 129 states have internal predecessors, (153), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 04:58:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2022-04-05 04:58:38,838 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 42 [2022-04-05 04:58:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:58:38,838 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2022-04-05 04:58:38,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 04:58:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2022-04-05 04:58:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 04:58:38,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:58:38,839 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:58:38,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 04:58:39,059 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,SelfDestructingSolverStorable13 [2022-04-05 04:58:39,059 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:58:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:58:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1684170134, now seen corresponding path program 1 times [2022-04-05 04:58:39,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:58:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912335991] [2022-04-05 04:58:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:58:39,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:58:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:39,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:58:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:39,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-05 04:58:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:58:39,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:58:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912335991] [2022-04-05 04:58:39,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912335991] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:58:39,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241068747] [2022-04-05 04:58:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:58:39,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:58:39,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:58:39,441 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) [2022-04-05 04:58:39,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 04:58:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:58:39,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-05 04:58:39,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:58:39,646 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-04-05 04:58:39,646 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 39 treesize of output 30 [2022-04-05 04:58:39,866 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-04-05 04:58:39,866 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 48 treesize of output 31 [2022-04-05 04:58:50,046 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-04-05 04:58:50,047 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 36 treesize of output 12 [2022-04-05 04:58:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:58:50,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:58:57,740 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 71 treesize of output 63 [2022-04-05 04:58:57,762 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-04-05 04:58:57,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 405 [2022-04-05 04:58:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:58:58,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241068747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 04:58:58,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 04:58:58,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 36 [2022-04-05 04:58:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873796373] [2022-04-05 04:58:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 04:58:58,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 04:58:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 04:58:58,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 04:58:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1112, Unknown=6, NotChecked=0, Total=1260 [2022-04-05 04:58:58,039 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 36 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:58:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 04:58:59,393 INFO L93 Difference]: Finished difference Result 201 states and 237 transitions. [2022-04-05 04:58:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 04:58:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2022-04-05 04:58:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 04:58:59,395 INFO L225 Difference]: With dead ends: 201 [2022-04-05 04:58:59,395 INFO L226 Difference]: Without dead ends: 199 [2022-04-05 04:58:59,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=395, Invalid=3381, Unknown=6, NotChecked=0, Total=3782 [2022-04-05 04:58:59,397 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 04:58:59,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 177 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1029 Invalid, 0 Unknown, 362 Unchecked, 0.6s Time] [2022-04-05 04:58:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-05 04:58:59,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2022-04-05 04:58:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 132 states have internal predecessors, (157), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 04:58:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2022-04-05 04:58:59,416 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 44 [2022-04-05 04:58:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 04:58:59,416 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2022-04-05 04:58:59,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-05 04:58:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2022-04-05 04:58:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 04:58:59,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 04:58:59,417 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 04:58:59,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-05 04:58:59,621 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,SelfDestructingSolverStorable14 [2022-04-05 04:58:59,622 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 04:58:59,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 04:58:59,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1656378862, now seen corresponding path program 4 times [2022-04-05 04:58:59,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 04:58:59,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441177967] [2022-04-05 04:58:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 04:58:59,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 04:58:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:59:00,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 04:59:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 04:59:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 04:59:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 04:59:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441177967] [2022-04-05 04:59:00,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441177967] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 04:59:00,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903996136] [2022-04-05 04:59:00,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 04:59:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 04:59:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 04:59:00,287 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) [2022-04-05 04:59:00,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 04:59:00,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 04:59:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 04:59:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-05 04:59:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 04:59:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-04-05 04:59:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,568 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:59:00,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-04-05 04:59:00,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,649 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:59:00,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-04-05 04:59:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-05 04:59:00,706 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:59:00,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2022-04-05 04:59:00,750 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-05 04:59:00,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-05 04:59:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 04:59:00,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 04:59:27,587 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 73 treesize of output 67 [2022-04-05 04:59:27,617 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-04-05 04:59:27,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5857 treesize of output 5679