/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-fpi/res1o.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:34:11,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:34:11,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:34:11,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:34:11,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:34:11,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:34:11,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:34:11,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:34:11,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:34:11,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:34:11,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:34:11,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:34:11,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:34:11,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:34:11,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:34:11,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:34:11,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:34:11,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:34:11,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:34:11,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:34:11,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:34:11,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:34:11,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:34:11,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:34:11,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:34:11,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:34:11,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:34:11,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:34:11,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:34:11,302 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:34:11,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:34:11,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:34:11,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:34:11,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:34:11,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:34:11,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:34:11,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:34:11,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:34:11,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:34:11,305 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:34:11,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:34:11,305 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:34:11,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:34:11,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:34:11,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:34:11,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:34:11,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:34:11,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:34:11,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:34:11,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:34:11,307 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:34:11,307 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:34:11,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:34:11,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:34:11,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:34:11,545 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:34:11,545 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:34:11,546 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1o.c [2022-01-31 11:34:11,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5a5928c9/29c62a5d4d474d3bb65af6d320fe4dd4/FLAGaac92b9e2 [2022-01-31 11:34:11,994 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:34:11,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1o.c [2022-01-31 11:34:12,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5a5928c9/29c62a5d4d474d3bb65af6d320fe4dd4/FLAGaac92b9e2 [2022-01-31 11:34:12,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5a5928c9/29c62a5d4d474d3bb65af6d320fe4dd4 [2022-01-31 11:34:12,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:34:12,016 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:34:12,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:34:12,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:34:12,025 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:34:12,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afdc28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12, skipping insertion in model container [2022-01-31 11:34:12,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:34:12,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:34:12,181 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1o.c[588,601] [2022-01-31 11:34:12,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:34:12,201 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:34:12,208 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res1o.c[588,601] [2022-01-31 11:34:12,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:34:12,224 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:34:12,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12 WrapperNode [2022-01-31 11:34:12,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:34:12,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:34:12,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:34:12,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:34:12,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:34:12,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:34:12,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:34:12,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:34:12,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:34:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:34:12,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 11:34:12,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 11:34:12,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:34:12,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:34:12,325 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:34:12,325 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:34:12,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:34:12,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:34:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:34:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:34:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:34:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:34:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:34:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:34:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:34:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:34:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:34:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 11:34:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:34:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:34:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:34:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:34:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:34:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:34:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:34:12,412 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:34:12,413 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:34:12,549 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:34:12,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:34:12,553 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 11:34:12,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:34:12 BoogieIcfgContainer [2022-01-31 11:34:12,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:34:12,555 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:34:12,555 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:34:12,566 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:34:12,569 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:34:12" (1/1) ... [2022-01-31 11:34:12,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:34:12 BasicIcfg [2022-01-31 11:34:12,597 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:34:12,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:34:12,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:34:12,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:34:12,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:34:12" (1/4) ... [2022-01-31 11:34:12,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f24eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:34:12, skipping insertion in model container [2022-01-31 11:34:12,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:34:12" (2/4) ... [2022-01-31 11:34:12,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f24eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:34:12, skipping insertion in model container [2022-01-31 11:34:12,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:34:12" (3/4) ... [2022-01-31 11:34:12,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f24eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:34:12, skipping insertion in model container [2022-01-31 11:34:12,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:34:12" (4/4) ... [2022-01-31 11:34:12,603 INFO L111 eAbstractionObserver]: Analyzing ICFG res1o.cJordan [2022-01-31 11:34:12,609 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:34:12,610 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:34:12,643 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:34:12,649 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 11:34:12,649 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:34:12,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 11:34:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 11:34:12,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:34:12,667 INFO L514 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, 1, 1] [2022-01-31 11:34:12,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:34:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:34:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 334130708, now seen corresponding path program 1 times [2022-01-31 11:34:12,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:34:12,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725708962] [2022-01-31 11:34:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:12,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:34:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:34:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:12,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:34:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:12,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:34:12,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725708962] [2022-01-31 11:34:12,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725708962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:34:12,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:34:12,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:34:12,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397075834] [2022-01-31 11:34:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:34:12,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:34:12,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:34:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:34:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:34:12,852 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 28 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:34:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:34:12,936 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-31 11:34:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:34:12,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-01-31 11:34:12,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:34:12,945 INFO L225 Difference]: With dead ends: 37 [2022-01-31 11:34:12,945 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 11:34:12,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:34:12,949 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:34:12,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:34:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 11:34:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 11:34:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 11:34:12,972 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2022-01-31 11:34:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:34:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 11:34:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:34:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 11:34:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 11:34:12,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:34:12,973 INFO L514 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, 1, 1] [2022-01-31 11:34:12,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:34:12,973 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:34:12,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:34:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1527605231, now seen corresponding path program 1 times [2022-01-31 11:34:12,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:34:12,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915399263] [2022-01-31 11:34:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:12,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:34:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:34:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:34:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:13,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:34:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915399263] [2022-01-31 11:34:13,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915399263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:34:13,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:34:13,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 11:34:13,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873649492] [2022-01-31 11:34:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:34:13,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 11:34:13,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:34:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 11:34:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 11:34:13,111 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:34:13,186 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-01-31 11:34:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 11:34:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-01-31 11:34:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:34:13,187 INFO L225 Difference]: With dead ends: 38 [2022-01-31 11:34:13,188 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 11:34:13,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 11:34:13,189 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:34:13,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 26 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:34:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 11:34:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-01-31 11:34:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-31 11:34:13,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2022-01-31 11:34:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:34:13,195 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-31 11:34:13,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-31 11:34:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 11:34:13,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:34:13,196 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:34:13,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 11:34:13,197 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:34:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:34:13,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1782587353, now seen corresponding path program 1 times [2022-01-31 11:34:13,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:34:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398597982] [2022-01-31 11:34:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:13,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:34:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:34:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:34:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:13,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:34:13,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398597982] [2022-01-31 11:34:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398597982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:34:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416945692] [2022-01-31 11:34:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:34:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:34:13,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:34:13,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 11:34:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 11:34:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:34:14,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:34:14,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-01-31 11:34:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:14,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-01-31 11:34:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:14,347 INFO L387 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 0 case distinctions, treesize of input 39 treesize of output 26 [2022-01-31 11:34:14,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:14,579 INFO L387 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 0 case distinctions, treesize of input 30 treesize of output 28 [2022-01-31 11:34:14,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:14,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-01-31 11:34:15,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:15,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-01-31 11:34:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:15,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:34:18,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:18,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:18,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416945692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:34:18,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:34:18,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 34 [2022-01-31 11:34:18,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634042195] [2022-01-31 11:34:18,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:34:18,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 11:34:18,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:34:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 11:34:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=949, Unknown=1, NotChecked=0, Total=1122 [2022-01-31 11:34:18,755 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 11:34:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:34:19,531 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-01-31 11:34:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 11:34:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-01-31 11:34:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:34:19,535 INFO L225 Difference]: With dead ends: 68 [2022-01-31 11:34:19,535 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 11:34:19,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=303, Invalid=1766, Unknown=1, NotChecked=0, Total=2070 [2022-01-31 11:34:19,537 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:34:19,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-01-31 11:34:19,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 11:34:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-01-31 11:34:19,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-01-31 11:34:19,543 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 33 [2022-01-31 11:34:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:34:19,544 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-01-31 11:34:19,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 11:34:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-01-31 11:34:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 11:34:19,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:34:19,545 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:34:19,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 11:34:19,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:34:19,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:34:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:34:19,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1886510619, now seen corresponding path program 2 times [2022-01-31 11:34:19,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:34:19,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759374628] [2022-01-31 11:34:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:19,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:34:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:19,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:34:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:19,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:34:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 11:34:19,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:34:19,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759374628] [2022-01-31 11:34:19,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759374628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:34:19,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777342817] [2022-01-31 11:34:19,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:34:19,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:34:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:34:19,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:34:19,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 11:34:19,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:34:19,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:34:19,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:34:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:34:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 11:34:20,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:34:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 11:34:20,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777342817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:34:20,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:34:20,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 11:34:20,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344360725] [2022-01-31 11:34:20,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:34:20,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:34:20,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:34:20,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:34:20,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:34:20,094 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:34:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:34:20,288 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-01-31 11:34:20,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 11:34:20,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-01-31 11:34:20,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:34:20,290 INFO L225 Difference]: With dead ends: 84 [2022-01-31 11:34:20,290 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 11:34:20,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:34:20,292 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:34:20,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 52 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:34:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 11:34:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2022-01-31 11:34:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-01-31 11:34:20,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 35 [2022-01-31 11:34:20,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:34:20,299 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-01-31 11:34:20,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:34:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-01-31 11:34:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 11:34:20,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:34:20,300 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:34:20,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 11:34:20,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 11:34:20,515 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:34:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:34:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash 400874463, now seen corresponding path program 3 times [2022-01-31 11:34:20,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:34:20,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037456347] [2022-01-31 11:34:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:20,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:34:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:20,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:34:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:20,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:34:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 11:34:20,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:34:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037456347] [2022-01-31 11:34:20,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037456347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:34:20,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440589450] [2022-01-31 11:34:20,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:34:20,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:34:20,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:34:20,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 11:34:20,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 11:34:20,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:34:20,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:34:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:34:20,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:34:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 11:34:20,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:34:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 11:34:20,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440589450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:34:20,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:34:20,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 11:34:20,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660035633] [2022-01-31 11:34:20,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:34:20,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:34:20,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:34:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:34:20,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:34:20,890 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:34:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:34:21,047 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 11:34:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 11:34:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-01-31 11:34:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:34:21,048 INFO L225 Difference]: With dead ends: 51 [2022-01-31 11:34:21,048 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 11:34:21,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-31 11:34:21,049 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:34:21,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 51 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:34:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 11:34:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2022-01-31 11:34:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:34:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-01-31 11:34:21,053 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 37 [2022-01-31 11:34:21,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:34:21,054 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-01-31 11:34:21,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:34:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-01-31 11:34:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 11:34:21,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:34:21,055 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:34:21,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 11:34:21,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:34:21,280 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:34:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:34:21,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1799560259, now seen corresponding path program 4 times [2022-01-31 11:34:21,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:34:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20882229] [2022-01-31 11:34:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:34:21,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:34:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:22,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:34:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:22,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:34:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:34:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:22,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:34:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20882229] [2022-01-31 11:34:22,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20882229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:34:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407431773] [2022-01-31 11:34:22,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:34:22,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:34:22,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:34:22,347 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) [2022-01-31 11:34:22,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 11:34:22,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:34:22,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:34:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 11:34:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:34:22,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:34:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:22,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:34:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:22,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-01-31 11:34:22,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:22,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:22,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-01-31 11:34:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-01-31 11:34:23,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:23,210 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-01-31 11:34:23,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 48 [2022-01-31 11:34:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:23,471 INFO L353 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-01-31 11:34:23,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2022-01-31 11:34:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:23,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:34:23,865 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-31 11:34:23,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2022-01-31 11:34:24,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:24,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-01-31 11:34:24,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:34:24,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2022-01-31 11:34:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:34:24,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:35:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:35:13,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407431773] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:35:13,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:35:13,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 61 [2022-01-31 11:35:13,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028636534] [2022-01-31 11:35:13,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:35:13,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 11:35:13,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:35:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 11:35:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3306, Unknown=19, NotChecked=0, Total=3660 [2022-01-31 11:35:13,784 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 61 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:35:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:35:23,285 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2022-01-31 11:35:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 11:35:23,286 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-01-31 11:35:23,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:35:23,287 INFO L225 Difference]: With dead ends: 90 [2022-01-31 11:35:23,287 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 11:35:23,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2063 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=642, Invalid=6144, Unknown=20, NotChecked=0, Total=6806 [2022-01-31 11:35:23,290 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 11:35:23,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 230 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 366 Invalid, 0 Unknown, 496 Unchecked, 0.3s Time] [2022-01-31 11:35:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 11:35:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2022-01-31 11:35:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:35:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-01-31 11:35:23,296 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 41 [2022-01-31 11:35:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:35:23,297 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-01-31 11:35:23,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:35:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-01-31 11:35:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 11:35:23,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:35:23,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1] [2022-01-31 11:35:23,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 11:35:23,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:35:23,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:35:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:35:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1017604101, now seen corresponding path program 5 times [2022-01-31 11:35:23,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:35:23,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18358404] [2022-01-31 11:35:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:35:23,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:35:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:23,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:35:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:23,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:35:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 11:35:23,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:35:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18358404] [2022-01-31 11:35:23,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18358404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:35:23,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942272649] [2022-01-31 11:35:23,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:35:23,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:35:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:35:23,608 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) [2022-01-31 11:35:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 11:35:23,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 11:35:23,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:35:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:35:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:35:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 11:35:23,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:35:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 11:35:23,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942272649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:35:23,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:35:23,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 11:35:23,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354117472] [2022-01-31 11:35:23,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:35:23,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 11:35:23,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:35:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 11:35:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:35:23,899 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:35:24,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:35:24,073 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-01-31 11:35:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 11:35:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-01-31 11:35:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:35:24,074 INFO L225 Difference]: With dead ends: 106 [2022-01-31 11:35:24,074 INFO L226 Difference]: Without dead ends: 82 [2022-01-31 11:35:24,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 11:35:24,075 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 85 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:35:24,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 47 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:35:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-01-31 11:35:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2022-01-31 11:35:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:35:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-01-31 11:35:24,081 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 43 [2022-01-31 11:35:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:35:24,082 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-01-31 11:35:24,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:35:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-01-31 11:35:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 11:35:24,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:35:24,108 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:35:24,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 11:35:24,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:35:24,308 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:35:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:35:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -913172023, now seen corresponding path program 6 times [2022-01-31 11:35:24,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:35:24,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141370479] [2022-01-31 11:35:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:35:24,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:35:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:24,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:35:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:24,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:35:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 11:35:24,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:35:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141370479] [2022-01-31 11:35:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141370479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:35:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785067391] [2022-01-31 11:35:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:35:24,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:35:24,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:35:24,406 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) [2022-01-31 11:35:24,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 11:35:24,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 11:35:24,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:35:24,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:35:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:35:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 11:35:24,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:35:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 11:35:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785067391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:35:24,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:35:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 11:35:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417199314] [2022-01-31 11:35:24,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:35:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 11:35:24,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:35:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 11:35:24,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 11:35:24,723 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:35:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:35:24,910 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-01-31 11:35:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 11:35:24,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-01-31 11:35:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:35:24,911 INFO L225 Difference]: With dead ends: 61 [2022-01-31 11:35:24,911 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 11:35:24,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 11:35:24,912 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:35:24,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 79 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:35:24,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 11:35:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-01-31 11:35:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:35:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-01-31 11:35:24,916 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2022-01-31 11:35:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:35:24,916 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-01-31 11:35:24,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:35:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-01-31 11:35:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 11:35:24,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:35:24,917 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:35:24,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 11:35:25,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:35:25,124 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:35:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:35:25,124 INFO L85 PathProgramCache]: Analyzing trace with hash 456719661, now seen corresponding path program 7 times [2022-01-31 11:35:25,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:35:25,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670590351] [2022-01-31 11:35:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:35:25,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:35:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:26,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:35:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:26,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:35:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:35:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:35:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670590351] [2022-01-31 11:35:26,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670590351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:35:26,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123528761] [2022-01-31 11:35:26,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 11:35:26,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:35:26,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:35:26,872 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) [2022-01-31 11:35:26,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 11:35:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:35:26,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 75 conjunts are in the unsatisfiable core [2022-01-31 11:35:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:35:26,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:35:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:35:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-01-31 11:35:27,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-01-31 11:35:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 54 [2022-01-31 11:35:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:27,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2022-01-31 11:35:27,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:27,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-01-31 11:35:28,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:28,173 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-01-31 11:35:28,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 59 [2022-01-31 11:35:28,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:28,454 INFO L353 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-01-31 11:35:28,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 81 [2022-01-31 11:35:28,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:28,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:28,789 INFO L353 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-01-31 11:35:28,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 90 [2022-01-31 11:35:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:29,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:29,244 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-31 11:35:29,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 110 treesize of output 96 [2022-01-31 11:35:29,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:35:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2022-01-31 11:35:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 49 [2022-01-31 11:35:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:35:29,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2022-01-31 11:35:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:35:29,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:38:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:38:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123528761] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:38:44,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:38:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 29] total 85 [2022-01-31 11:38:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451301139] [2022-01-31 11:38:44,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:38:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 11:38:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:38:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 11:38:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=6550, Unknown=59, NotChecked=0, Total=7140 [2022-01-31 11:38:44,780 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 85 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:39:42,516 WARN L228 SmtUtils]: Spent 22.81s on a formula simplification. DAG size of input: 187 DAG size of output: 176 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 11:42:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:42:31,935 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2022-01-31 11:42:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 11:42:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-01-31 11:42:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:42:31,937 INFO L225 Difference]: With dead ends: 114 [2022-01-31 11:42:31,937 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 11:42:31,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4549 ImplicationChecksByTransitivity, 400.0s TimeCoverageRelationStatistics Valid=1075, Invalid=13556, Unknown=131, NotChecked=0, Total=14762 [2022-01-31 11:42:31,940 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 958 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 11:42:31,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 313 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 651 Invalid, 0 Unknown, 958 Unchecked, 0.4s Time] [2022-01-31 11:42:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 11:42:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2022-01-31 11:42:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:42:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-01-31 11:42:31,949 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 49 [2022-01-31 11:42:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:42:31,949 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-01-31 11:42:31,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:42:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-01-31 11:42:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 11:42:31,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:42:31,950 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:42:31,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 11:42:32,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:42:32,160 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:42:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:42:32,160 INFO L85 PathProgramCache]: Analyzing trace with hash -962021777, now seen corresponding path program 8 times [2022-01-31 11:42:32,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:42:32,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926037624] [2022-01-31 11:42:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:42:32,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:42:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:42:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:32,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:42:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 11:42:32,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:42:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926037624] [2022-01-31 11:42:32,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926037624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:42:32,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233012494] [2022-01-31 11:42:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:42:32,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:42:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:42:32,320 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) [2022-01-31 11:42:32,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 11:42:32,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:42:32,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:42:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 11:42:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:42:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 11:42:32,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:42:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 11:42:32,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233012494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:42:32,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:42:32,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 11:42:32,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900589099] [2022-01-31 11:42:32,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:42:32,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:42:32,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:42:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:42:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 11:42:32,692 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:42:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:42:32,978 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2022-01-31 11:42:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 11:42:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-01-31 11:42:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:42:32,979 INFO L225 Difference]: With dead ends: 130 [2022-01-31 11:42:32,980 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 11:42:32,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-31 11:42:32,980 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 101 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:42:32,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 73 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:42:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 11:42:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2022-01-31 11:42:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 77 states have (on average 1.103896103896104) internal successors, (85), 77 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:42:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-01-31 11:42:32,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 51 [2022-01-31 11:42:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:42:32,995 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-01-31 11:42:32,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:42:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-01-31 11:42:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 11:42:32,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:42:32,995 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:42:33,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 11:42:33,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 11:42:33,201 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:42:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:42:33,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1914510387, now seen corresponding path program 9 times [2022-01-31 11:42:33,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:42:33,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905017253] [2022-01-31 11:42:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:42:33,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:42:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:33,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:42:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:33,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:42:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 11:42:33,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:42:33,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905017253] [2022-01-31 11:42:33,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905017253] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:42:33,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644351207] [2022-01-31 11:42:33,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:42:33,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:42:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:42:33,340 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) [2022-01-31 11:42:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 11:42:33,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 11:42:33,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:42:33,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 11:42:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:42:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 11:42:33,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:42:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 11:42:33,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644351207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:42:33,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 11:42:33,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 11:42:33,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040035575] [2022-01-31 11:42:33,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 11:42:33,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 11:42:33,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:42:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 11:42:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 11:42:33,799 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:42:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:42:34,081 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-01-31 11:42:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 11:42:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-01-31 11:42:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:42:34,082 INFO L225 Difference]: With dead ends: 73 [2022-01-31 11:42:34,082 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 11:42:34,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-01-31 11:42:34,083 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 11:42:34,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 69 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 11:42:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 11:42:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2022-01-31 11:42:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 11:42:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-01-31 11:42:34,086 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 53 [2022-01-31 11:42:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:42:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-01-31 11:42:34,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:42:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-01-31 11:42:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 11:42:34,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:42:34,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 11:42:34,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 11:42:34,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:42:34,299 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:42:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:42:34,300 INFO L85 PathProgramCache]: Analyzing trace with hash -3382633, now seen corresponding path program 10 times [2022-01-31 11:42:34,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:42:34,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149154221] [2022-01-31 11:42:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:42:34,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:42:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:37,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:42:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:37,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:42:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:42:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:42:37,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:42:37,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149154221] [2022-01-31 11:42:37,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149154221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 11:42:37,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697071415] [2022-01-31 11:42:37,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:42:37,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:42:37,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:42:37,240 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) [2022-01-31 11:42:37,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 11:42:37,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:42:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:42:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 95 conjunts are in the unsatisfiable core [2022-01-31 11:42:37,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:42:37,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 11:42:37,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 11:42:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-31 11:42:37,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-01-31 11:42:37,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:37,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-01-31 11:42:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2022-01-31 11:42:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:38,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 69 [2022-01-31 11:42:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:38,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 66 [2022-01-31 11:42:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:38,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-01-31 11:42:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:39,044 INFO L353 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-01-31 11:42:39,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 70 [2022-01-31 11:42:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:39,394 INFO L353 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-01-31 11:42:39,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 107 treesize of output 93 [2022-01-31 11:42:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:39,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:39,777 INFO L353 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-01-31 11:42:39,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 114 treesize of output 107 [2022-01-31 11:42:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:40,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:40,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:40,205 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 11:42:40,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 113 treesize of output 113 [2022-01-31 11:42:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2022-01-31 11:42:40,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:40,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 71 [2022-01-31 11:42:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:42:41,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-01-31 11:42:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 60 [2022-01-31 11:42:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:42:41,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2022-01-31 11:42:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 11:42:41,734 INFO L328 TraceCheckSpWp]: Computing backward predicates...