/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/ss1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 11:55:51,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 11:55:51,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 11:55:51,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 11:55:51,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 11:55:51,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 11:55:51,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 11:55:51,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 11:55:51,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 11:55:51,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 11:55:51,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 11:55:51,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 11:55:51,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 11:55:51,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 11:55:51,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 11:55:51,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 11:55:51,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 11:55:51,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 11:55:51,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 11:55:51,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 11:55:51,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 11:55:51,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 11:55:51,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 11:55:51,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 11:55:51,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 11:55:51,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 11:55:51,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 11:55:51,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 11:55:51,322 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 11:55:51,330 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 11:55:51,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 11:55:51,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 11:55:51,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 11:55:51,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 11:55:51,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 11:55:51,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 11:55:51,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 11:55:51,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 11:55:51,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:55:51,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 11:55:51,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 11:55:51,333 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 11:55:51,333 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 11:55:51,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 11:55:51,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 11:55:51,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 11:55:51,539 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 11:55:51,540 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 11:55:51,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ss1.c [2022-01-31 11:55:51,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36726f7fd/1f3460d16cd8469ca5795a9811870f4c/FLAG71fcb5bf5 [2022-01-31 11:55:51,938 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 11:55:51,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ss1.c [2022-01-31 11:55:51,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36726f7fd/1f3460d16cd8469ca5795a9811870f4c/FLAG71fcb5bf5 [2022-01-31 11:55:52,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36726f7fd/1f3460d16cd8469ca5795a9811870f4c [2022-01-31 11:55:52,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 11:55:52,361 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 11:55:52,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 11:55:52,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 11:55:52,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 11:55:52,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d8c9075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52, skipping insertion in model container [2022-01-31 11:55:52,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 11:55:52,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 11:55:52,482 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/ss1.c[586,599] [2022-01-31 11:55:52,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:55:52,528 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 11:55:52,541 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/ss1.c[586,599] [2022-01-31 11:55:52,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 11:55:52,571 INFO L208 MainTranslator]: Completed translation [2022-01-31 11:55:52,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52 WrapperNode [2022-01-31 11:55:52,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 11:55:52,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 11:55:52,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 11:55:52,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 11:55:52,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 11:55:52,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 11:55:52,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 11:55:52,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 11:55:52,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 11:55:52,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:55:52,628 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 11:55:52,644 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 11:55:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 11:55:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 11:55:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 11:55:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 11:55:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 11:55:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 11:55:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 11:55:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 11:55:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 11:55:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 11:55:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 11:55:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 11:55:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 11:55:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 11:55:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 11:55:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 11:55:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 11:55:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 11:55:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 11:55:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 11:55:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 11:55:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 11:55:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 11:55:52,766 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 11:55:52,767 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 11:55:52,942 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 11:55:52,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 11:55:52,959 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 11:55:52,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:55:52 BoogieIcfgContainer [2022-01-31 11:55:52,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 11:55:52,961 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 11:55:52,961 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 11:55:52,962 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 11:55:52,964 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:55:52" (1/1) ... [2022-01-31 11:55:52,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:55:52 BasicIcfg [2022-01-31 11:55:52,974 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 11:55:52,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 11:55:52,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 11:55:52,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 11:55:52,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:55:52" (1/4) ... [2022-01-31 11:55:52,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c0c955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:55:52, skipping insertion in model container [2022-01-31 11:55:52,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:55:52" (2/4) ... [2022-01-31 11:55:52,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c0c955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:55:52, skipping insertion in model container [2022-01-31 11:55:52,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:55:52" (3/4) ... [2022-01-31 11:55:52,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c0c955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 11:55:52, skipping insertion in model container [2022-01-31 11:55:52,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 11:55:52" (4/4) ... [2022-01-31 11:55:52,991 INFO L111 eAbstractionObserver]: Analyzing ICFG ss1.cJordan [2022-01-31 11:55:52,994 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 11:55:52,994 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 11:55:53,022 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 11:55:53,027 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 11:55:53,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 11:55:53,035 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 11:55:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 11:55:53,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:55:53,043 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 11:55:53,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:55:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:55:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash 334130708, now seen corresponding path program 1 times [2022-01-31 11:55:53,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:55:53,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248159328] [2022-01-31 11:55:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:53,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:55:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:55:53,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 11:55:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:55:53,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 11:55:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:55:53,176 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 11:55:53,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:55:53,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248159328] [2022-01-31 11:55:53,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248159328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:55:53,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:55:53,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 11:55:53,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808981572] [2022-01-31 11:55:53,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:55:53,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 11:55:53,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:55:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 11:55:53,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 11:55:53,201 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 11:55:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:55:53,258 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-31 11:55:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 11:55:53,260 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 11:55:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:55:53,267 INFO L225 Difference]: With dead ends: 37 [2022-01-31 11:55:53,267 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 11:55:53,268 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 11:55:53,270 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:55:53,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:55:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 11:55:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 11:55:53,292 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 11:55:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 11:55:53,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2022-01-31 11:55:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:55:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 11:55:53,294 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 11:55:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 11:55:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 11:55:53,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:55:53,295 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 11:55:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 11:55:53,296 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:55:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:55:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1527605231, now seen corresponding path program 1 times [2022-01-31 11:55:53,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:55:53,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853671118] [2022-01-31 11:55:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:53,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:55:53,316 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:55:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072384097] [2022-01-31 11:55:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:53,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:55:53,318 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 11:55:53,328 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 11:55:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:55:53,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 11:55:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:55:53,449 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 11:55:53,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 11:55:53,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:55:53,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853671118] [2022-01-31 11:55:53,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:55:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072384097] [2022-01-31 11:55:53,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072384097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 11:55:53,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 11:55:53,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 11:55:53,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708963769] [2022-01-31 11:55:53,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 11:55:53,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 11:55:53,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:55:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 11:55:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 11:55:53,452 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 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 11:55:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:55:53,485 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-01-31 11:55:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 11:55:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-01-31 11:55:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:55:53,486 INFO L225 Difference]: With dead ends: 38 [2022-01-31 11:55:53,486 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 11:55:53,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 11:55:53,488 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 11:55:53,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 11:55:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 11:55:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-01-31 11:55:53,491 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 11:55:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-31 11:55:53,492 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2022-01-31 11:55:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:55:53,492 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-31 11:55:53,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 3 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 11:55:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-31 11:55:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 11:55:53,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:55:53,493 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 11:55:53,512 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 11:55:53,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:53,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:55:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:55:53,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1782587353, now seen corresponding path program 1 times [2022-01-31 11:55:53,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:55:53,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930571822] [2022-01-31 11:55:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:53,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:55:53,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:55:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578871071] [2022-01-31 11:55:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:53,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:55:53,765 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 11:55:53,767 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 11:55:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:55:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 11:55:53,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:55:53,884 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 11:55:53,891 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 10 treesize of output 8 [2022-01-31 11:55:53,936 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 11:55:54,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-01-31 11:55:54,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 23 [2022-01-31 11:55:54,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2022-01-31 11:55:54,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2022-01-31 11:55:54,417 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 11:55:54,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:55:54,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:55:54,898 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 11:55:54,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:55:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930571822] [2022-01-31 11:55:54,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:55:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578871071] [2022-01-31 11:55:54,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578871071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:55:54,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:55:54,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2022-01-31 11:55:54,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813440750] [2022-01-31 11:55:54,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:55:54,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 11:55:54,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:55:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 11:55:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-31 11:55:54,901 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 11:55:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:55:55,650 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-01-31 11:55:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 11:55:55,651 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-01-31 11:55:55,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:55:55,652 INFO L225 Difference]: With dead ends: 56 [2022-01-31 11:55:55,652 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 11:55:55,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 11:55:55,653 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 11:55:55,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 368 Invalid, 0 Unknown, 4 Unchecked, 0.4s Time] [2022-01-31 11:55:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 11:55:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-01-31 11:55:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 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 11:55:55,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-01-31 11:55:55,659 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 33 [2022-01-31 11:55:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:55:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-01-31 11:55:55,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 11:55:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-01-31 11:55:55,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 11:55:55,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:55:55,660 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 11:55:55,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 11:55:55,877 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,SelfDestructingSolverStorable2 [2022-01-31 11:55:55,877 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:55:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:55:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1886510619, now seen corresponding path program 2 times [2022-01-31 11:55:55,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:55:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742685196] [2022-01-31 11:55:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:55,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:55:55,908 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:55:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067596764] [2022-01-31 11:55:55,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 11:55:55,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:55,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:55:55,909 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 11:55:55,910 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 11:55:55,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 11:55:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:55:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:55:55,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:55:56,024 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 11:55:56,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:55:56,093 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 11:55:56,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:55:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742685196] [2022-01-31 11:55:56,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:55:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067596764] [2022-01-31 11:55:56,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067596764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:55:56,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:55:56,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:55:56,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818333984] [2022-01-31 11:55:56,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:55:56,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:55:56,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:55:56,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:55:56,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:55:56,095 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:55:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:55:56,189 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-01-31 11:55:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 11:55:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 11:55:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:55:56,191 INFO L225 Difference]: With dead ends: 75 [2022-01-31 11:55:56,191 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 11:55:56,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:55:56,192 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:55:56,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 88 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:55:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 11:55:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2022-01-31 11:55:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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 11:55:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-01-31 11:55:56,196 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2022-01-31 11:55:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:55:56,196 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-01-31 11:55:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:55:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-01-31 11:55:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 11:55:56,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:55:56,197 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 11:55:56,217 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 11:55:56,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:56,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:55:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:55:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -899444771, now seen corresponding path program 3 times [2022-01-31 11:55:56,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:55:56,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895690541] [2022-01-31 11:55:56,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:56,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:55:56,434 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:55:56,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930347780] [2022-01-31 11:55:56,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 11:55:56,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:55:56,444 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 11:55:56,445 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 11:55:56,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 11:55:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:55:56,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 11:55:56,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:55:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 11:55:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:55:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 11:55:56,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:55:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895690541] [2022-01-31 11:55:56,622 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:55:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930347780] [2022-01-31 11:55:56,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930347780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:55:56,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:55:56,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 11:55:56,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362712865] [2022-01-31 11:55:56,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:55:56,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 11:55:56,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:55:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 11:55:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 11:55:56,624 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:55:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:55:56,714 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-01-31 11:55:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 11:55:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 11:55:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:55:56,717 INFO L225 Difference]: With dead ends: 45 [2022-01-31 11:55:56,717 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 11:55:56,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-31 11:55:56,720 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:55:56,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 92 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:55:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 11:55:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-01-31 11:55:56,727 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 11:55:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-01-31 11:55:56,731 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-01-31 11:55:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:55:56,732 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-01-31 11:55:56,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:55:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-01-31 11:55:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 11:55:56,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:55:56,734 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 11:55:56,751 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 11:55:56,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:56,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:55:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:55:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1799560259, now seen corresponding path program 4 times [2022-01-31 11:55:56,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:55:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966156344] [2022-01-31 11:55:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:55:56,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:55:56,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:55:56,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455514961] [2022-01-31 11:55:56,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 11:55:56,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:55:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:55:56,973 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 11:55:56,999 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 11:55:57,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 11:55:57,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:55:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2022-01-31 11:55:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:55:57,136 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 11:55:57,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,156 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 11:55:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,201 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 11:55:57,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:55:57,329 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 49 treesize of output 39 [2022-01-31 11:55:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,429 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 51 treesize of output 35 [2022-01-31 11:55:57,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:55:57,573 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 59 treesize of output 41 [2022-01-31 11:55:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,664 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 49 treesize of output 35 [2022-01-31 11:55:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:55:57,796 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 49 treesize of output 39 [2022-01-31 11:55:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,875 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 43 treesize of output 33 [2022-01-31 11:55:57,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:55:57,958 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 37 treesize of output 17 [2022-01-31 11:55:58,031 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 11:55:58,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:56:22,068 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 11:56:22,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:56:22,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966156344] [2022-01-31 11:56:22,069 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:56:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455514961] [2022-01-31 11:56:22,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455514961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:56:22,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:56:22,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2022-01-31 11:56:22,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948835691] [2022-01-31 11:56:22,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:56:22,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 11:56:22,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:56:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 11:56:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1580, Unknown=1, NotChecked=0, Total=1722 [2022-01-31 11:56:22,071 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 42 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (5), 2 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 11:56:28,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 11:56:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:56:48,438 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-01-31 11:56:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 11:56:48,438 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (5), 2 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 41 [2022-01-31 11:56:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:56:48,439 INFO L225 Difference]: With dead ends: 77 [2022-01-31 11:56:48,439 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 11:56:48,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=225, Invalid=2744, Unknown=1, NotChecked=0, Total=2970 [2022-01-31 11:56:48,441 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-01-31 11:56:48,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 360 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 964 Invalid, 0 Unknown, 85 Unchecked, 11.5s Time] [2022-01-31 11:56:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 11:56:48,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2022-01-31 11:56:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 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 11:56:48,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-01-31 11:56:48,447 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2022-01-31 11:56:48,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:56:48,447 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-01-31 11:56:48,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.5) internal successors, (60), 41 states have internal predecessors, (60), 3 states have call successors, (5), 2 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 11:56:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-01-31 11:56:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 11:56:48,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:56:48,448 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 11:56:48,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 11:56:48,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:56:48,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:56:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:56:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1017604101, now seen corresponding path program 5 times [2022-01-31 11:56:48,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:56:48,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043133482] [2022-01-31 11:56:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:56:48,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:56:48,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:56:48,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689513507] [2022-01-31 11:56:48,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 11:56:48,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:56:48,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:56:48,720 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 11:56:48,738 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 11:56:48,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 11:56:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:56:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:56:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:56:48,928 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 11:56:48,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:56:49,014 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 11:56:49,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:56:49,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043133482] [2022-01-31 11:56:49,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:56:49,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689513507] [2022-01-31 11:56:49,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689513507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:56:49,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:56:49,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 11:56:49,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111041742] [2022-01-31 11:56:49,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:56:49,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:56:49,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:56:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:56:49,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:56:49,016 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:56:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:56:49,153 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-01-31 11:56:49,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 11:56:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 11:56:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:56:49,155 INFO L225 Difference]: With dead ends: 93 [2022-01-31 11:56:49,155 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 11:56:49,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 11:56:49,155 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:56:49,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 73 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:56:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 11:56:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-01-31 11:56:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 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 11:56:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-01-31 11:56:49,159 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 43 [2022-01-31 11:56:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:56:49,159 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-01-31 11:56:49,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:56:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-01-31 11:56:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 11:56:49,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:56:49,159 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 11:56:49,192 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 11:56:49,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:56:49,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:56:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:56:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash 973621319, now seen corresponding path program 6 times [2022-01-31 11:56:49,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:56:49,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754627888] [2022-01-31 11:56:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:56:49,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:56:49,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:56:49,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826532065] [2022-01-31 11:56:49,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 11:56:49,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:56:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:56:49,381 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 11:56:49,382 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 11:56:49,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 11:56:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 11:56:49,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 11:56:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:56:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 11:56:49,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 11:56:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 11:56:49,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 11:56:49,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754627888] [2022-01-31 11:56:49,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 11:56:49,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826532065] [2022-01-31 11:56:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826532065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 11:56:49,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 11:56:49,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 11:56:49,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960909388] [2022-01-31 11:56:49,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 11:56:49,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 11:56:49,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 11:56:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 11:56:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 11:56:49,655 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:56:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 11:56:49,813 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-01-31 11:56:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 11:56:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 11:56:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 11:56:49,814 INFO L225 Difference]: With dead ends: 53 [2022-01-31 11:56:49,814 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 11:56:49,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 11:56:49,815 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 11:56:49,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 105 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 11:56:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 11:56:49,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-01-31 11:56:49,817 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 11:56:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-01-31 11:56:49,818 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2022-01-31 11:56:49,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 11:56:49,818 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-01-31 11:56:49,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 11:56:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-01-31 11:56:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 11:56:49,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 11:56:49,819 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 11:56:49,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 11:56:50,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:56:50,028 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 11:56:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 11:56:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash 456719661, now seen corresponding path program 7 times [2022-01-31 11:56:50,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 11:56:50,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435722] [2022-01-31 11:56:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 11:56:50,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 11:56:50,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 11:56:50,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586212497] [2022-01-31 11:56:50,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 11:56:50,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 11:56:50,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 11:56:50,045 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 11:56:50,070 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 11:56:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 11:56:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 90 conjunts are in the unsatisfiable core [2022-01-31 11:56:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 11:56:50,172 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 10 treesize of output 8 [2022-01-31 11:56:50,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 11:56:50,215 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 11:56:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,254 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 11:56:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,327 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 47 treesize of output 52 [2022-01-31 11:56:50,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:56:50,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,489 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 58 treesize of output 51 [2022-01-31 11:56:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:56:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,582 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 62 treesize of output 49 [2022-01-31 11:56:50,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,695 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 56 treesize of output 47 [2022-01-31 11:56:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:56:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,838 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 70 treesize of output 53 [2022-01-31 11:56:50,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:56:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:50,971 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 58 [2022-01-31 11:56:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,099 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 70 treesize of output 51 [2022-01-31 11:56:51,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:56:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,259 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 84 treesize of output 59 [2022-01-31 11:56:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 11:56:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 11:56:51,414 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 105 treesize of output 68 [2022-01-31 11:56:51,530 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 50 treesize of output 43 [2022-01-31 11:56:51,616 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 36 treesize of output 16 [2022-01-31 11:56:51,721 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 11:56:51,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:00:37,115 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 12:00:37,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:00:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435722] [2022-01-31 12:00:37,115 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 12:00:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586212497] [2022-01-31 12:00:37,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586212497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:00:37,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:00:37,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2022-01-31 12:00:37,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494844591] [2022-01-31 12:00:37,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:00:37,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 12:00:37,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:00:37,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 12:00:37,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3069, Unknown=36, NotChecked=0, Total=3306 [2022-01-31 12:00:37,117 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 58 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 57 states have internal predecessors, (76), 3 states have call successors, (5), 2 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 12:02:45,758 WARN L228 SmtUtils]: Spent 13.21s on a formula simplification. DAG size of input: 145 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 12:03:17,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:13,890 WARN L228 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 12:04:16,426 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:20,433 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:21,503 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:22,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:27,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:29,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:31,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:33,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:04:37,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:17,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:26,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:27,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:29,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:32,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:34,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:38,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:41,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:44,438 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-31 12:05:48,124 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse17 (select |c_#memory_int| |c_main_~#sum~0.base|))) (let ((.cse6 (+ c_main_~a~0.offset 16)) (.cse7 (+ c_main_~a~0.offset 8)) (.cse15 (select .cse17 |c_main_~#sum~0.offset|)) (.cse18 (select |c_#memory_int| c_main_~a~0.base)) (.cse0 (+ (* c_~N~0 2) (* c_~N~0 c_~N~0)))) (and (or (< c_main_~i~0 c_~N~0) (= .cse0 (let ((.cse13 (select .cse18 c_main_~a~0.offset))) (let ((.cse16 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse17 |c_main_~#sum~0.offset| (+ .cse13 .cse15))) c_main_~a~0.base) .cse7))) (let ((.cse14 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse17 |c_main_~#sum~0.offset| (+ .cse13 .cse15 .cse16))) c_main_~a~0.base) .cse6))) (let ((.cse9 (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse17 |c_main_~#sum~0.offset| (+ .cse13 .cse14 .cse15 .cse16))))) (let ((.cse8 (let ((.cse10 (let ((.cse11 (let ((.cse12 (select .cse9 c_main_~a~0.base))) (store .cse12 c_main_~a~0.offset (+ .cse13 .cse14 .cse15 (select .cse12 c_main_~a~0.offset) .cse16))))) (store .cse11 .cse7 (+ (select (select (store .cse9 c_main_~a~0.base .cse11) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (select .cse11 .cse7)))))) (store .cse10 .cse6 (+ (select (select (store .cse9 c_main_~a~0.base .cse10) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (select .cse10 .cse6)))))) (let ((.cse3 (store .cse9 c_main_~a~0.base .cse8))) (let ((.cse4 (select .cse3 |c_main_~#sum~0.base|))) (let ((.cse1 (select .cse8 c_main_~a~0.offset)) (.cse2 (select .cse4 |c_main_~#sum~0.offset|))) (let ((.cse5 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ .cse1 .cse2))) c_main_~a~0.base) .cse7))) (+ .cse1 .cse2 (select (select (store .cse3 |c_main_~#sum~0.base| (store .cse4 |c_main_~#sum~0.offset| (+ .cse1 .cse2 .cse5))) c_main_~a~0.base) .cse6) .cse5)))))))))))) (= (let ((.cse29 (select .cse18 (+ c_main_~a~0.offset (* c_main_~i~0 8) 8)))) (let ((.cse25 (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse17 |c_main_~#sum~0.offset| (+ .cse29 .cse15))))) (let ((.cse24 (let ((.cse26 (let ((.cse27 (let ((.cse28 (select .cse25 c_main_~a~0.base))) (store .cse28 c_main_~a~0.offset (+ .cse29 .cse15 (select .cse28 c_main_~a~0.offset)))))) (store .cse27 .cse7 (+ (select .cse27 .cse7) (select (select (store .cse25 c_main_~a~0.base .cse27) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)))))) (store .cse26 .cse6 (+ (select .cse26 .cse6) (select (select (store .cse25 c_main_~a~0.base .cse26) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)))))) (let ((.cse22 (store .cse25 c_main_~a~0.base .cse24))) (let ((.cse23 (select .cse22 |c_main_~#sum~0.base|))) (let ((.cse20 (select .cse23 |c_main_~#sum~0.offset|)) (.cse21 (select .cse24 c_main_~a~0.offset))) (let ((.cse19 (select (select (store .cse22 |c_main_~#sum~0.base| (store .cse23 |c_main_~#sum~0.offset| (+ .cse20 .cse21))) c_main_~a~0.base) .cse7))) (+ .cse19 .cse20 .cse21 (select (select (store .cse22 |c_main_~#sum~0.base| (store .cse23 |c_main_~#sum~0.offset| (+ .cse19 .cse20 .cse21))) c_main_~a~0.base) .cse6))))))))) .cse0)))) is different from false [2022-01-31 12:05:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:05:49,137 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-01-31 12:05:49,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 12:05:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 57 states have internal predecessors, (76), 3 states have call successors, (5), 2 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 49 [2022-01-31 12:05:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:05:49,138 INFO L225 Difference]: With dead ends: 92 [2022-01-31 12:05:49,138 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 12:05:49,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 444.5s TimeCoverageRelationStatistics Valid=304, Invalid=4747, Unknown=65, NotChecked=140, Total=5256 [2022-01-31 12:05:49,139 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 54 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 90.6s IncrementalHoareTripleChecker+Time [2022-01-31 12:05:49,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 484 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1357 Invalid, 7 Unknown, 245 Unchecked, 90.6s Time] [2022-01-31 12:05:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 12:05:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2022-01-31 12:05:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 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 12:05:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-01-31 12:05:49,143 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 49 [2022-01-31 12:05:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:05:49,143 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-01-31 12:05:49,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 57 states have internal predecessors, (76), 3 states have call successors, (5), 2 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 12:05:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-01-31 12:05:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 12:05:49,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:05:49,144 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 12:05:49,167 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 12:05:49,351 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,SelfDestructingSolverStorable8 [2022-01-31 12:05:49,352 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:05:49,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:05:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash -962021777, now seen corresponding path program 8 times [2022-01-31 12:05:49,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:05:49,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852198890] [2022-01-31 12:05:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:05:49,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:05:49,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:05:49,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648979015] [2022-01-31 12:05:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:05:49,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:05:49,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:05:49,376 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 12:05:49,379 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 12:05:49,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:05:49,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:05:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 12:05:49,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:05:49,571 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 12:05:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:05:49,692 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 12:05:49,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:05:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852198890] [2022-01-31 12:05:49,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 12:05:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648979015] [2022-01-31 12:05:49,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648979015] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:05:49,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:05:49,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 12:05:49,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031367043] [2022-01-31 12:05:49,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:05:49,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 12:05:49,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:05:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 12:05:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 12:05:49,693 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 12:05:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:05:49,912 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2022-01-31 12:05:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 12:05:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 12:05:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:05:49,913 INFO L225 Difference]: With dead ends: 111 [2022-01-31 12:05:49,913 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 12:05:49,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-31 12:05:49,914 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:05:49,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 116 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:05:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 12:05:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2022-01-31 12:05:49,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 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 12:05:49,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-01-31 12:05:49,927 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 51 [2022-01-31 12:05:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:05:49,928 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-01-31 12:05:49,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 12:05:49,928 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-01-31 12:05:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 12:05:49,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:05:49,928 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 12:05:49,945 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 12:05:50,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 12:05:50,129 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:05:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:05:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1763960113, now seen corresponding path program 9 times [2022-01-31 12:05:50,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:05:50,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133756225] [2022-01-31 12:05:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:05:50,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:05:50,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:05:50,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114178080] [2022-01-31 12:05:50,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:05:50,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:05:50,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:05:50,173 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 12:05:50,174 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 12:05:50,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 12:05:50,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:05:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 12:05:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:05:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 12:05:50,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:05:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 12:05:50,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:05:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133756225] [2022-01-31 12:05:50,562 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 12:05:50,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114178080] [2022-01-31 12:05:50,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114178080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:05:50,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:05:50,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 12:05:50,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938043644] [2022-01-31 12:05:50,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:05:50,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 12:05:50,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:05:50,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 12:05:50,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 12:05:50,563 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 12:05:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:05:50,820 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-01-31 12:05:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 12:05:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 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 12:05:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:05:50,821 INFO L225 Difference]: With dead ends: 61 [2022-01-31 12:05:50,821 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 12:05:50,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-01-31 12:05:50,848 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:05:50,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 101 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:05:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 12:05:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-01-31 12:05:50,851 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 12:05:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-01-31 12:05:50,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2022-01-31 12:05:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:05:50,851 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-01-31 12:05:50,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 12:05:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-01-31 12:05:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 12:05:50,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:05:50,852 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 12:05:50,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 12:05:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 12:05:51,063 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:05:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:05:51,063 INFO L85 PathProgramCache]: Analyzing trace with hash -3382633, now seen corresponding path program 10 times [2022-01-31 12:05:51,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:05:51,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122552568] [2022-01-31 12:05:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:05:51,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:05:51,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 12:05:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407024953] [2022-01-31 12:05:51,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 12:05:51,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:05:51,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:05:51,104 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:05:51,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 12:05:51,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 12:05:51,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:05:51,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 113 conjunts are in the unsatisfiable core [2022-01-31 12:05:51,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:05:51,242 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 12:05:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,267 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 12:05:51,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,333 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 12:05:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,422 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 12:05:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,510 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 12:05:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:51,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,662 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 67 treesize of output 63 [2022-01-31 12:05:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,777 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 69 treesize of output 63 [2022-01-31 12:05:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:51,896 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 69 treesize of output 63 [2022-01-31 12:05:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:52,022 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 72 treesize of output 66 [2022-01-31 12:05:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,274 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 73 treesize of output 65 [2022-01-31 12:05:52,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,426 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 89 treesize of output 70 [2022-01-31 12:05:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:52,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,643 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 87 treesize of output 73 [2022-01-31 12:05:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,783 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 79 treesize of output 63 [2022-01-31 12:05:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:52,990 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 89 treesize of output 67 [2022-01-31 12:05:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:53,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,202 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 107 treesize of output 74 [2022-01-31 12:05:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 12:05:53,436 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 100 treesize of output 70 [2022-01-31 12:05:53,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,600 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 59 treesize of output 55 [2022-01-31 12:05:53,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:05:53,709 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 45 treesize of output 21 [2022-01-31 12:05:53,855 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 12:05:53,855 INFO L328 TraceCheckSpWp]: Computing backward predicates...