/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-patterns/array17_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:09:25,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:09:25,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:09:25,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:09:25,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:09:25,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:09:25,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:09:25,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:09:25,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:09:25,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:09:25,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:09:25,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:09:25,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:09:25,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:09:25,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:09:25,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:09:25,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:09:25,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:09:25,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:09:25,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:09:25,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:09:25,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:09:25,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:09:25,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:09:25,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:09:25,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:09:25,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:09:25,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:09:25,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:09:25,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:09:25,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:09:25,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:09:25,154 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:09:25,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:09:25,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:09:25,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:09:25,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:09:25,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:09:25,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:09:25,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:09:25,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:09:25,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:09:25,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:09:25,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:09:25,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:09:25,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:09:25,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:09:25,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:09:25,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:09:25,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:09:25,157 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:09:25,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:09:25,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:09:25,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:09:25,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:09:25,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:09:25,370 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:09:25,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array17_pattern.c [2022-01-31 10:09:25,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc2e4859/2c340aeb9ad446869c9df1f7876f0002/FLAGbdf0121fa [2022-01-31 10:09:25,771 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:09:25,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array17_pattern.c [2022-01-31 10:09:25,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc2e4859/2c340aeb9ad446869c9df1f7876f0002/FLAGbdf0121fa [2022-01-31 10:09:25,792 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc2e4859/2c340aeb9ad446869c9df1f7876f0002 [2022-01-31 10:09:25,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:09:25,794 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:09:25,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:09:25,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:09:25,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:09:25,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a70faec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25, skipping insertion in model container [2022-01-31 10:09:25,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:09:25,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:09:25,917 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-patterns/array17_pattern.c[1441,1454] [2022-01-31 10:09:25,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:09:25,938 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:09:25,945 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-patterns/array17_pattern.c[1441,1454] [2022-01-31 10:09:25,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:09:25,962 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:09:25,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25 WrapperNode [2022-01-31 10:09:25,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:09:25,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:09:25,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:09:25,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:09:25,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:09:25,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:09:25,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:09:25,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:09:25,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (1/1) ... [2022-01-31 10:09:25,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:09:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:26,012 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 10:09:26,014 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 10:09:26,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:09:26,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:09:26,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:09:26,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:09:26,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:09:26,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:09:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:09:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:09:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:09:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:09:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:09:26,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:09:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:09:26,102 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:09:26,103 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:09:26,241 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:09:26,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:09:26,246 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 10:09:26,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:09:26 BoogieIcfgContainer [2022-01-31 10:09:26,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:09:26,247 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:09:26,247 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:09:26,248 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:09:26,250 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:09:26" (1/1) ... [2022-01-31 10:09:26,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:09:26 BasicIcfg [2022-01-31 10:09:26,267 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:09:26,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:09:26,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:09:26,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:09:26,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:09:25" (1/4) ... [2022-01-31 10:09:26,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13abbce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:09:26, skipping insertion in model container [2022-01-31 10:09:26,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:09:25" (2/4) ... [2022-01-31 10:09:26,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13abbce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:09:26, skipping insertion in model container [2022-01-31 10:09:26,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:09:26" (3/4) ... [2022-01-31 10:09:26,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13abbce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:09:26, skipping insertion in model container [2022-01-31 10:09:26,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:09:26" (4/4) ... [2022-01-31 10:09:26,272 INFO L111 eAbstractionObserver]: Analyzing ICFG array17_pattern.cJordan [2022-01-31 10:09:26,275 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:09:26,275 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:09:26,314 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:09:26,318 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 10:09:26,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:09:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 30 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:09:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:09:26,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:26,339 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] [2022-01-31 10:09:26,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1563598307, now seen corresponding path program 1 times [2022-01-31 10:09:26,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:26,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429584885] [2022-01-31 10:09:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:26,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:09:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:26,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:09:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:26,542 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 10:09:26,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:26,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429584885] [2022-01-31 10:09:26,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429584885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:09:26,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:09:26,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:09:26,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699530352] [2022-01-31 10:09:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:09:26,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:09:26,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:09:26,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:09:26,573 INFO L87 Difference]: Start difference. First operand has 41 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 30 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 10:09:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:26,645 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-31 10:09:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:09:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 20 [2022-01-31 10:09:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:26,652 INFO L225 Difference]: With dead ends: 41 [2022-01-31 10:09:26,652 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 10:09:26,654 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 10:09:26,660 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:26,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:09:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 10:09:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-31 10:09:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:09:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-01-31 10:09:26,694 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2022-01-31 10:09:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:26,695 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-01-31 10:09:26,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 10:09:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-01-31 10:09:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 10:09:26,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:26,698 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2022-01-31 10:09:26,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:09:26,698 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1530716502, now seen corresponding path program 1 times [2022-01-31 10:09:26,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:26,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93821725] [2022-01-31 10:09:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:26,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:26,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:09:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417266440] [2022-01-31 10:09:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:26,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:26,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:26,738 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 10:09:26,739 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 10:09:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:26,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 10:09:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:09:26,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:09:26,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93821725] [2022-01-31 10:09:26,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:09:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417266440] [2022-01-31 10:09:26,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417266440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:09:26,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:09:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:09:26,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322998538] [2022-01-31 10:09:26,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:09:26,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:09:26,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:09:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:09:26,891 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:09:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:26,906 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-01-31 10:09:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:09:26,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-01-31 10:09:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:26,907 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:09:26,907 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 10:09:26,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:09:26,908 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:26,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:09:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 10:09:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 10:09:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:09:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-01-31 10:09:26,913 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 35 [2022-01-31 10:09:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:26,914 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-01-31 10:09:26,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:09:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-01-31 10:09:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:09:26,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:26,915 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-01-31 10:09:26,937 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 10:09:27,131 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 10:09:27,132 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 978510442, now seen corresponding path program 1 times [2022-01-31 10:09:27,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:27,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276883757] [2022-01-31 10:09:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:27,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:27,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:09:27,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685112074] [2022-01-31 10:09:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:27,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:27,153 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 10:09:27,154 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 10:09:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:09:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 10:09:27,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:09:27,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276883757] [2022-01-31 10:09:27,301 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:09:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685112074] [2022-01-31 10:09:27,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685112074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:09:27,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:09:27,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:09:27,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621937495] [2022-01-31 10:09:27,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:09:27,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:09:27,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:27,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:09:27,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:09:27,303 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:09:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:27,352 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2022-01-31 10:09:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:09:27,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 10:09:27,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:27,353 INFO L225 Difference]: With dead ends: 61 [2022-01-31 10:09:27,353 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 10:09:27,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:09:27,354 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:27,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 100 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:09:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 10:09:27,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2022-01-31 10:09:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:09:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-01-31 10:09:27,358 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 40 [2022-01-31 10:09:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:27,358 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-01-31 10:09:27,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:09:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-01-31 10:09:27,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:09:27,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:27,359 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:09:27,375 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 10:09:27,562 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 10:09:27,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2042070073, now seen corresponding path program 1 times [2022-01-31 10:09:27,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:27,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368117387] [2022-01-31 10:09:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:27,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:27,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:09:27,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518041122] [2022-01-31 10:09:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:27,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:27,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:27,595 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 10:09:27,608 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 10:09:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:09:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:09:27,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:09:27,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:27,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368117387] [2022-01-31 10:09:27,726 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:09:27,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518041122] [2022-01-31 10:09:27,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518041122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:09:27,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:09:27,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:09:27,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080085972] [2022-01-31 10:09:27,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:09:27,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:09:27,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:09:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:09:27,727 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:09:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:09:27,770 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-31 10:09:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 10:09:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-01-31 10:09:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:09:27,771 INFO L225 Difference]: With dead ends: 41 [2022-01-31 10:09:27,771 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 10:09:27,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:09:27,772 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:09:27,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 72 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:09:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 10:09:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-01-31 10:09:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:09:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-01-31 10:09:27,776 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 43 [2022-01-31 10:09:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:09:27,776 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-01-31 10:09:27,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:09:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-01-31 10:09:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:09:27,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:09:27,778 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:09:27,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 10:09:27,991 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 10:09:27,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:09:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:09:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1553445182, now seen corresponding path program 1 times [2022-01-31 10:09:27,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:09:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944233604] [2022-01-31 10:09:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:27,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:09:28,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:09:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397845651] [2022-01-31 10:09:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:09:28,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:09:28,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:09:28,017 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 10:09:28,018 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 10:09:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:09:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 10:09:28,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:09:28,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2022-01-31 10:09:28,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-01-31 10:09:28,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:09:28,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 61 [2022-01-31 10:09:28,698 INFO L353 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2022-01-31 10:09:28,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 62 [2022-01-31 10:09:28,720 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 33 treesize of output 18 [2022-01-31 10:09:28,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 160 [2022-01-31 10:09:28,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 171 [2022-01-31 10:09:28,899 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 26 treesize of output 3 [2022-01-31 10:09:28,918 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 24 treesize of output 3 [2022-01-31 10:09:28,925 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 25 treesize of output 3 [2022-01-31 10:09:29,120 INFO L353 Elim1Store]: treesize reduction 23, result has 11.5 percent of original size [2022-01-31 10:09:29,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 27 [2022-01-31 10:09:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:09:29,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:09:48,562 WARN L228 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 10:10:21,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944233604] [2022-01-31 10:10:21,098 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397845651] [2022-01-31 10:10:21,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397845651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:10:21,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:10:21,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-01-31 10:10:21,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995547363] [2022-01-31 10:10:21,099 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:21,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 10:10:21,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 10:10:21,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=733, Unknown=9, NotChecked=0, Total=870 [2022-01-31 10:10:21,100 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 19 states have internal predecessors, (35), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:10:21,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:21,579 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2022-01-31 10:10:21,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:10:21,579 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 19 states have internal predecessors, (35), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-01-31 10:10:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:21,581 INFO L225 Difference]: With dead ends: 91 [2022-01-31 10:10:21,581 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 10:10:21,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=232, Invalid=1319, Unknown=9, NotChecked=0, Total=1560 [2022-01-31 10:10:21,582 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 57 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:21,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 295 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-31 10:10:21,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 10:10:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2022-01-31 10:10:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:10:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2022-01-31 10:10:21,589 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 45 [2022-01-31 10:10:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:21,589 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2022-01-31 10:10:21,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 19 states have internal predecessors, (35), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:10:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2022-01-31 10:10:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:10:21,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:21,590 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:10:21,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:21,790 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 10:10:21,791 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1042911005, now seen corresponding path program 1 times [2022-01-31 10:10:21,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:21,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681567678] [2022-01-31 10:10:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:21,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:21,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:21,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159444761] [2022-01-31 10:10:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:21,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:21,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:21,813 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 10:10:21,822 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 10:10:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:10:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 10:10:21,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 10:10:21,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:10:21,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681567678] [2022-01-31 10:10:21,913 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159444761] [2022-01-31 10:10:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159444761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:10:21,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:10:21,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:10:21,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894447535] [2022-01-31 10:10:21,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:10:21,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:10:21,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:10:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:10:21,915 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 10:10:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:21,936 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2022-01-31 10:10:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:10:21,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-01-31 10:10:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:21,942 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:10:21,942 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 10:10:21,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 10:10:21,945 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:21,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 84 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:10:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 10:10:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-01-31 10:10:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 67 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:10:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-01-31 10:10:21,958 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 45 [2022-01-31 10:10:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:21,958 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-01-31 10:10:21,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 10:10:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-01-31 10:10:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:10:21,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:21,959 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:10:21,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:22,179 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 10:10:22,180 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash 537352380, now seen corresponding path program 1 times [2022-01-31 10:10:22,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570695358] [2022-01-31 10:10:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:22,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:22,201 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:22,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660250064] [2022-01-31 10:10:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:22,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:22,203 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 10:10:22,225 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 10:10:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:10:22,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:10:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:10:22,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 10:10:22,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:22,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570695358] [2022-01-31 10:10:22,767 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:22,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660250064] [2022-01-31 10:10:22,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660250064] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:22,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:22,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-01-31 10:10:22,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195539597] [2022-01-31 10:10:22,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:22,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:10:22,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:10:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:10:22,769 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 18 states, 16 states have (on average 2.625) internal successors, (42), 13 states have internal predecessors, (42), 5 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:10:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:23,152 INFO L93 Difference]: Finished difference Result 157 states and 185 transitions. [2022-01-31 10:10:23,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 10:10:23,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 13 states have internal predecessors, (42), 5 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-01-31 10:10:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:23,153 INFO L225 Difference]: With dead ends: 157 [2022-01-31 10:10:23,153 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 10:10:23,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:10:23,154 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 119 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:23,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 222 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:10:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 10:10:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2022-01-31 10:10:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:10:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-01-31 10:10:23,163 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 45 [2022-01-31 10:10:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:23,164 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-01-31 10:10:23,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.625) internal successors, (42), 13 states have internal predecessors, (42), 5 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:10:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-01-31 10:10:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 10:10:23,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:23,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:23,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 10:10:23,383 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 10:10:23,383 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash 254999865, now seen corresponding path program 2 times [2022-01-31 10:10:23,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:23,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419661725] [2022-01-31 10:10:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:23,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:23,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:23,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255934214] [2022-01-31 10:10:23,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:10:23,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:23,407 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 10:10:23,423 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 10:10:23,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:10:23,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:23,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:10:23,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:10:23,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:10:23,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:23,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419661725] [2022-01-31 10:10:23,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:23,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255934214] [2022-01-31 10:10:23,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255934214] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:23,651 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:23,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:10:23,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000150576] [2022-01-31 10:10:23,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:23,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:10:23,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:10:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:10:23,652 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:23,776 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-01-31 10:10:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:10:23,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-01-31 10:10:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:23,777 INFO L225 Difference]: With dead ends: 140 [2022-01-31 10:10:23,777 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 10:10:23,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 86 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 10:10:23,778 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 116 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:23,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 159 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:10:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 10:10:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2022-01-31 10:10:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 87 states have internal predecessors, (100), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:10:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-01-31 10:10:23,784 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 47 [2022-01-31 10:10:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:23,785 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-01-31 10:10:23,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-01-31 10:10:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 10:10:23,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:23,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:23,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 10:10:24,002 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 10:10:24,003 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash 136360195, now seen corresponding path program 3 times [2022-01-31 10:10:24,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:24,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132661210] [2022-01-31 10:10:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:24,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:24,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:24,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084099334] [2022-01-31 10:10:24,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:10:24,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:24,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:24,023 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 10:10:24,039 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 10:10:24,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:10:24,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:24,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 10:10:24,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:24,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 160 [2022-01-31 10:10:24,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 171 [2022-01-31 10:10:24,337 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 25 treesize of output 3 [2022-01-31 10:10:24,356 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 25 treesize of output 3 [2022-01-31 10:10:24,419 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 24 treesize of output 3 [2022-01-31 10:10:24,448 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 24 treesize of output 3 [2022-01-31 10:10:24,496 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 26 treesize of output 3 [2022-01-31 10:10:24,518 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 26 treesize of output 3 [2022-01-31 10:10:24,567 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 23 treesize of output 3 [2022-01-31 10:10:24,604 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 23 treesize of output 3 [2022-01-31 10:10:31,967 WARN L228 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 92 DAG size of output: 57 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-31 10:10:31,969 INFO L353 Elim1Store]: treesize reduction 462, result has 23.1 percent of original size [2022-01-31 10:10:31,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 205 treesize of output 223 [2022-01-31 10:11:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 10:11:16,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:11:16,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 158 [2022-01-31 10:11:16,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:11:16,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 158 treesize of output 171 [2022-01-31 10:11:16,629 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 24 treesize of output 4 [2022-01-31 10:11:16,638 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 24 treesize of output 4 [2022-01-31 10:11:16,687 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 25 treesize of output 4 [2022-01-31 10:11:16,711 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 25 treesize of output 4 [2022-01-31 10:11:16,755 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 26 treesize of output 4 [2022-01-31 10:11:16,782 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 26 treesize of output 4 [2022-01-31 10:11:16,833 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 27 treesize of output 4 [2022-01-31 10:11:16,849 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 27 treesize of output 4 [2022-01-31 10:11:18,563 INFO L353 Elim1Store]: treesize reduction 244, result has 37.9 percent of original size [2022-01-31 10:11:18,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 227 [2022-01-31 10:11:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 10:11:37,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:11:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132661210] [2022-01-31 10:11:37,782 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:11:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084099334] [2022-01-31 10:11:37,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084099334] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:11:37,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:11:37,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-01-31 10:11:37,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386609632] [2022-01-31 10:11:37,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:11:37,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 10:11:37,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:11:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 10:11:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=550, Unknown=4, NotChecked=0, Total=650 [2022-01-31 10:11:37,784 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 26 states, 23 states have (on average 2.347826086956522) internal successors, (54), 25 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:11:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:11:47,849 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-01-31 10:11:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:11:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.347826086956522) internal successors, (54), 25 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-01-31 10:11:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:11:47,851 INFO L225 Difference]: With dead ends: 125 [2022-01-31 10:11:47,851 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 10:11:47,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=178, Invalid=938, Unknown=6, NotChecked=0, Total=1122 [2022-01-31 10:11:47,853 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 10:11:47,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 431 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 288 Invalid, 0 Unknown, 127 Unchecked, 0.8s Time] [2022-01-31 10:11:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 10:11:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 105. [2022-01-31 10:11:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:11:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2022-01-31 10:11:47,857 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 47 [2022-01-31 10:11:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:11:47,858 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2022-01-31 10:11:47,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.347826086956522) internal successors, (54), 25 states have internal predecessors, (54), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:11:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2022-01-31 10:11:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 10:11:47,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:11:47,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:11:47,882 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 10:11:48,070 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 10:11:48,071 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:11:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:11:48,071 INFO L85 PathProgramCache]: Analyzing trace with hash -879732607, now seen corresponding path program 2 times [2022-01-31 10:11:48,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:11:48,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612612864] [2022-01-31 10:11:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:11:48,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:11:48,085 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:11:48,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577838840] [2022-01-31 10:11:48,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:11:48,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:11:48,095 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 10:11:48,101 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 10:11:48,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:11:48,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:11:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:11:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:11:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:11:48,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:11:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 10:11:48,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:11:48,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612612864] [2022-01-31 10:11:48,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:11:48,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577838840] [2022-01-31 10:11:48,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577838840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:11:48,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:11:48,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-31 10:11:48,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193740701] [2022-01-31 10:11:48,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:11:48,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 10:11:48,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:11:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 10:11:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:11:48,315 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:11:48,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:11:48,447 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2022-01-31 10:11:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:11:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-01-31 10:11:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:11:48,448 INFO L225 Difference]: With dead ends: 132 [2022-01-31 10:11:48,448 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 10:11:48,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-31 10:11:48,449 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:11:48,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 193 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:11:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 10:11:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 116. [2022-01-31 10:11:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 98 states have (on average 1.183673469387755) internal successors, (116), 100 states have internal predecessors, (116), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:11:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2022-01-31 10:11:48,462 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 47 [2022-01-31 10:11:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:11:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2022-01-31 10:11:48,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:11:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2022-01-31 10:11:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 10:11:48,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:11:48,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:11:48,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 10:11:48,675 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 10:11:48,677 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:11:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:11:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash -934952062, now seen corresponding path program 4 times [2022-01-31 10:11:48,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:11:48,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812407906] [2022-01-31 10:11:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:11:48,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:11:48,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:11:48,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881869323] [2022-01-31 10:11:48,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:11:48,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:48,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:11:48,701 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 10:11:48,723 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 10:11:48,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:11:48,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:11:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:11:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:11:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:11:48,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:11:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 10:11:48,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:11:48,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812407906] [2022-01-31 10:11:48,945 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:11:48,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881869323] [2022-01-31 10:11:48,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881869323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:11:48,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:11:48,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:11:48,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444742478] [2022-01-31 10:11:48,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:11:48,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:11:48,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:11:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:11:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:11:48,947 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:11:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:11:49,040 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2022-01-31 10:11:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:11:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-01-31 10:11:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:11:49,041 INFO L225 Difference]: With dead ends: 127 [2022-01-31 10:11:49,041 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 10:11:49,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:11:49,042 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:11:49,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 123 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:11:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 10:11:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-01-31 10:11:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:11:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-01-31 10:11:49,044 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 50 [2022-01-31 10:11:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:11:49,044 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-01-31 10:11:49,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:11:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-01-31 10:11:49,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 10:11:49,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:11:49,045 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:11:49,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 10:11:49,264 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 10:11:49,264 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:11:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:11:49,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1798136888, now seen corresponding path program 3 times [2022-01-31 10:11:49,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:11:49,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894177778] [2022-01-31 10:11:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:11:49,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:11:49,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:11:49,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443488125] [2022-01-31 10:11:49,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:11:49,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:11:49,293 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 10:11:49,343 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 10:11:49,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:11:49,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:11:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:11:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:11:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 10:11:49,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:11:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 10:11:49,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:11:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894177778] [2022-01-31 10:11:49,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:11:49,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443488125] [2022-01-31 10:11:49,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443488125] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:11:49,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:11:49,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-01-31 10:11:49,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523381756] [2022-01-31 10:11:49,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:11:49,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 10:11:49,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:11:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 10:11:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:11:49,780 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:11:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:11:50,010 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2022-01-31 10:11:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 10:11:50,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2022-01-31 10:11:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:11:50,012 INFO L225 Difference]: With dead ends: 129 [2022-01-31 10:11:50,012 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 10:11:50,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:11:50,013 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 86 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:11:50,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 234 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:11:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 10:11:50,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 69. [2022-01-31 10:11:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:11:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2022-01-31 10:11:50,016 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 54 [2022-01-31 10:11:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:11:50,016 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2022-01-31 10:11:50,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:11:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2022-01-31 10:11:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 10:11:50,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:11:50,016 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1] [2022-01-31 10:11:50,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 10:11:50,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 10:11:50,231 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:11:50,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:11:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 59148278, now seen corresponding path program 5 times [2022-01-31 10:11:50,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:11:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888969406] [2022-01-31 10:11:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:11:50,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:11:50,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:11:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180025088] [2022-01-31 10:11:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:11:50,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:50,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:11:50,243 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:11:50,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:11:50,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:11:50,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:11:50,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:11:50,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:11:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 10:11:50,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:11:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 10:11:50,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:11:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888969406] [2022-01-31 10:11:50,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:11:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180025088] [2022-01-31 10:11:50,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180025088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:11:50,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:11:50,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:11:50,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265595129] [2022-01-31 10:11:50,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:11:50,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:11:50,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:11:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:11:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:11:50,514 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:11:50,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:11:50,648 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-01-31 10:11:50,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 10:11:50,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 59 [2022-01-31 10:11:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:11:50,649 INFO L225 Difference]: With dead ends: 65 [2022-01-31 10:11:50,649 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 10:11:50,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:11:50,650 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:11:50,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 112 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:11:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 10:11:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-01-31 10:11:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:11:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-01-31 10:11:50,652 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 59 [2022-01-31 10:11:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:11:50,652 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-01-31 10:11:50,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:11:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-01-31 10:11:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 10:11:50,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:11:50,653 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1] [2022-01-31 10:11:50,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 10:11:50,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 10:11:50,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:11:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:11:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1103606634, now seen corresponding path program 6 times [2022-01-31 10:11:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:11:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366301419] [2022-01-31 10:11:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:11:50,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:11:50,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:11:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594785942] [2022-01-31 10:11:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:11:50,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:50,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:11:50,865 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:11:50,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:11:52,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 10:11:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:11:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-31 10:11:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:11:52,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 50 [2022-01-31 10:11:52,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 17 [2022-01-31 10:11:52,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-01-31 10:11:52,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 69 [2022-01-31 10:11:52,272 INFO L353 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2022-01-31 10:11:52,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 88 [2022-01-31 10:11:52,282 INFO L353 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-01-31 10:11:52,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 17 [2022-01-31 10:11:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 55 treesize of output 22 [2022-01-31 10:11:52,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 70 [2022-01-31 10:11:52,541 INFO L353 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2022-01-31 10:11:52,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 93 [2022-01-31 10:11:52,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:11:52,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 28 [2022-01-31 10:11:52,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 71 [2022-01-31 10:11:52,810 INFO L353 Elim1Store]: treesize reduction 272, result has 15.8 percent of original size [2022-01-31 10:11:52,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 108 [2022-01-31 10:11:52,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:11:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:52,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 41 [2022-01-31 10:12:06,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 93 [2022-01-31 10:12:06,517 INFO L353 Elim1Store]: treesize reduction 455, result has 21.6 percent of original size [2022-01-31 10:12:06,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 92 treesize of output 195 [2022-01-31 10:12:06,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:06,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:06,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 53 [2022-01-31 10:12:11,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 247 [2022-01-31 10:12:15,373 INFO L353 Elim1Store]: treesize reduction 1471, result has 18.3 percent of original size [2022-01-31 10:12:15,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 250 treesize of output 549 [2022-01-31 10:12:15,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:15,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:16,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:16,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:16,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:16,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:16,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:16,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,022 INFO L244 Elim1Store]: Index analysis took 106 ms [2022-01-31 10:12:17,091 INFO L353 Elim1Store]: treesize reduction 47, result has 39.7 percent of original size [2022-01-31 10:12:17,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 520 treesize of output 459 [2022-01-31 10:12:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:17,448 INFO L353 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-01-31 10:12:17,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 459 treesize of output 390 [2022-01-31 10:12:17,959 INFO L353 Elim1Store]: treesize reduction 313, result has 12.1 percent of original size [2022-01-31 10:12:17,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 455 treesize of output 393 [2022-01-31 10:13:13,909 INFO L353 Elim1Store]: treesize reduction 813, result has 24.8 percent of original size [2022-01-31 10:13:13,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 400 treesize of output 429 [2022-01-31 10:13:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 10:13:41,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:14:38,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:14:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366301419] [2022-01-31 10:14:38,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:14:38,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594785942] [2022-01-31 10:14:38,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594785942] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:14:38,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:14:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-01-31 10:14:38,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119790831] [2022-01-31 10:14:38,383 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:14:38,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 10:14:38,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:14:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 10:14:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2662, Unknown=34, NotChecked=0, Total=3080 [2022-01-31 10:14:38,384 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:14:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:14:38,665 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2022-01-31 10:14:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:14:38,666 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2022-01-31 10:14:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:14:38,666 INFO L225 Difference]: With dead ends: 104 [2022-01-31 10:14:38,666 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 10:14:38,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 99.6s TimeCoverageRelationStatistics Valid=405, Invalid=2867, Unknown=34, NotChecked=0, Total=3306 [2022-01-31 10:14:38,667 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:14:38,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 472 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 472 Unchecked, 0.0s Time] [2022-01-31 10:14:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 10:14:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-01-31 10:14:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:14:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 110 transitions. [2022-01-31 10:14:38,670 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 110 transitions. Word has length 63 [2022-01-31 10:14:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:14:38,670 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 110 transitions. [2022-01-31 10:14:38,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:14:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 110 transitions. [2022-01-31 10:14:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 10:14:38,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:14:38,671 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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, 1] [2022-01-31 10:14:38,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:14:38,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 10:14:38,871 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:14:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:14:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1936051496, now seen corresponding path program 4 times [2022-01-31 10:14:38,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:14:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684021564] [2022-01-31 10:14:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:14:38,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:14:38,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:14:38,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776924963] [2022-01-31 10:14:38,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:14:38,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:14:38,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:14:38,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:14:38,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:14:40,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:14:40,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:14:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 91 conjunts are in the unsatisfiable core [2022-01-31 10:14:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:14:40,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:14:40,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-01-31 10:14:40,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2022-01-31 10:14:40,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 71 [2022-01-31 10:14:40,510 INFO L353 Elim1Store]: treesize reduction 136, result has 18.6 percent of original size [2022-01-31 10:14:40,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 92 [2022-01-31 10:14:40,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 46 treesize of output 19 [2022-01-31 10:14:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 61 treesize of output 24 [2022-01-31 10:14:40,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 68 [2022-01-31 10:14:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 89 [2022-01-31 10:14:40,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:14:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:40,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2022-01-31 10:14:41,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 10:14:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 104 [2022-01-31 10:14:41,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:14:41,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 22 [2022-01-31 10:14:41,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 117 [2022-01-31 10:14:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,033 INFO L353 Elim1Store]: treesize reduction 277, result has 8.6 percent of original size [2022-01-31 10:14:42,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 141 [2022-01-31 10:14:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,068 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-31 10:14:42,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 46 [2022-01-31 10:14:42,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 275 [2022-01-31 10:14:42,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,626 INFO L353 Elim1Store]: treesize reduction 365, result has 5.9 percent of original size [2022-01-31 10:14:42,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 5 select indices, 5 select index equivalence classes, 22 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 369 [2022-01-31 10:14:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,691 INFO L353 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-01-31 10:14:42,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 59 [2022-01-31 10:14:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,826 INFO L353 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2022-01-31 10:14:42,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 66 [2022-01-31 10:14:42,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:42,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 44 [2022-01-31 10:14:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:43,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:14:43,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 33 [2022-01-31 10:14:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:14:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:14:57,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:14:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684021564] [2022-01-31 10:14:57,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:14:57,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776924963] [2022-01-31 10:14:57,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776924963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:14:57,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:14:57,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-01-31 10:14:57,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416895165] [2022-01-31 10:14:57,315 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:14:57,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 10:14:57,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:14:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 10:14:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=2016, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 10:14:57,316 INFO L87 Difference]: Start difference. First operand 95 states and 110 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 27 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:14:59,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:14:59,324 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2022-01-31 10:14:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 10:14:59,325 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 27 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2022-01-31 10:14:59,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:14:59,326 INFO L225 Difference]: With dead ends: 160 [2022-01-31 10:14:59,326 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 10:14:59,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=527, Invalid=2779, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 10:14:59,327 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 72 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:14:59,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 337 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 561 Invalid, 0 Unknown, 119 Unchecked, 1.0s Time] [2022-01-31 10:14:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 10:14:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2022-01-31 10:14:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:14:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2022-01-31 10:14:59,331 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 63 [2022-01-31 10:14:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:14:59,331 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2022-01-31 10:14:59,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 27 states have internal predecessors, (50), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 10:14:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2022-01-31 10:14:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 10:14:59,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:14:59,331 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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, 1] [2022-01-31 10:14:59,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 10:14:59,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:14:59,532 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:14:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:14:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1961221487, now seen corresponding path program 7 times [2022-01-31 10:14:59,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:14:59,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508635056] [2022-01-31 10:14:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:14:59,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:14:59,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:14:59,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810051075] [2022-01-31 10:14:59,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:14:59,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:14:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:14:59,549 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:14:59,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:14:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:14:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:14:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:14:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 10:14:59,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:14:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 10:14:59,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:14:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508635056] [2022-01-31 10:14:59,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:14:59,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810051075] [2022-01-31 10:14:59,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810051075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:14:59,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:14:59,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:14:59,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010139329] [2022-01-31 10:14:59,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:14:59,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:14:59,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:14:59,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:14:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:14:59,910 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:15:00,160 INFO L93 Difference]: Finished difference Result 217 states and 252 transitions. [2022-01-31 10:15:00,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:15:00,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-01-31 10:15:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:15:00,162 INFO L225 Difference]: With dead ends: 217 [2022-01-31 10:15:00,162 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 10:15:00,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 119 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 10:15:00,163 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 182 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:15:00,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 165 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:15:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 10:15:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2022-01-31 10:15:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 148 states have internal predecessors, (173), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:15:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 199 transitions. [2022-01-31 10:15:00,167 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 199 transitions. Word has length 65 [2022-01-31 10:15:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:15:00,167 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 199 transitions. [2022-01-31 10:15:00,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 199 transitions. [2022-01-31 10:15:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 10:15:00,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:15:00,168 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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, 1] [2022-01-31 10:15:00,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 10:15:00,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:15:00,379 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:15:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:15:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1637788509, now seen corresponding path program 5 times [2022-01-31 10:15:00,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:15:00,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267546075] [2022-01-31 10:15:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:15:00,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:15:00,392 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:15:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704807957] [2022-01-31 10:15:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:15:00,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:15:00,393 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:15:00,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:15:00,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 10:15:00,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:15:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:15:00,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:15:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 10:15:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:15:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-31 10:15:00,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:15:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267546075] [2022-01-31 10:15:00,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:15:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704807957] [2022-01-31 10:15:00,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704807957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:15:00,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:15:00,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:15:00,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110181783] [2022-01-31 10:15:00,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:15:00,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:15:00,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:15:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:15:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:15:00,725 INFO L87 Difference]: Start difference. First operand 170 states and 199 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:15:01,106 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-01-31 10:15:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:15:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2022-01-31 10:15:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:15:01,109 INFO L225 Difference]: With dead ends: 161 [2022-01-31 10:15:01,109 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 10:15:01,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 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 10:15:01,110 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 68 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:15:01,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 290 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:15:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 10:15:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 148. [2022-01-31 10:15:01,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 129 states have internal predecessors, (147), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:15:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2022-01-31 10:15:01,113 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 65 [2022-01-31 10:15:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:15:01,114 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2022-01-31 10:15:01,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2022-01-31 10:15:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:15:01,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:15:01,114 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:15:01,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 10:15:01,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 10:15:01,331 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:15:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:15:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash -577241051, now seen corresponding path program 8 times [2022-01-31 10:15:01,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:15:01,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929099121] [2022-01-31 10:15:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:15:01,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:15:01,347 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:15:01,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837587610] [2022-01-31 10:15:01,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:15:01,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:01,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:15:01,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:15:01,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:15:01,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:15:01,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:15:01,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:15:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:15:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 10:15:01,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:15:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 10:15:01,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:15:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929099121] [2022-01-31 10:15:01,804 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:15:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837587610] [2022-01-31 10:15:01,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837587610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:15:01,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:15:01,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:15:01,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845551969] [2022-01-31 10:15:01,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:15:01,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:15:01,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:15:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:15:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:15:01,806 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:15:02,150 INFO L93 Difference]: Finished difference Result 165 states and 183 transitions. [2022-01-31 10:15:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:15:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-01-31 10:15:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:15:02,151 INFO L225 Difference]: With dead ends: 165 [2022-01-31 10:15:02,151 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 10:15:02,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-01-31 10:15:02,152 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 76 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:15:02,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:15:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 10:15:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 140. [2022-01-31 10:15:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 121 states have (on average 1.1239669421487604) internal successors, (136), 121 states have internal predecessors, (136), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:15:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 158 transitions. [2022-01-31 10:15:02,155 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 158 transitions. Word has length 70 [2022-01-31 10:15:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:15:02,155 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 158 transitions. [2022-01-31 10:15:02,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:02,155 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 158 transitions. [2022-01-31 10:15:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:15:02,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:15:02,156 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:15:02,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:15:02,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:15:02,357 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:15:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:15:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1749999139, now seen corresponding path program 9 times [2022-01-31 10:15:02,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:15:02,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975012810] [2022-01-31 10:15:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:15:02,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:15:02,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:15:02,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135051151] [2022-01-31 10:15:02,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:15:02,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:02,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:15:02,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:15:02,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:15:04,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 10:15:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:15:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:15:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:15:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:15:04,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:15:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 10:15:04,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:15:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975012810] [2022-01-31 10:15:04,393 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:15:04,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135051151] [2022-01-31 10:15:04,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135051151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:15:04,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:15:04,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:15:04,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487366659] [2022-01-31 10:15:04,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:15:04,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:15:04,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:15:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:15:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:15:04,395 INFO L87 Difference]: Start difference. First operand 140 states and 158 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:15:04,740 INFO L93 Difference]: Finished difference Result 247 states and 278 transitions. [2022-01-31 10:15:04,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:15:04,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-01-31 10:15:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:15:04,742 INFO L225 Difference]: With dead ends: 247 [2022-01-31 10:15:04,742 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 10:15:04,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:15:04,743 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 66 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:15:04,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 268 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:15:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 10:15:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 166. [2022-01-31 10:15:04,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:15:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 188 transitions. [2022-01-31 10:15:04,747 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 188 transitions. Word has length 70 [2022-01-31 10:15:04,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:15:04,747 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 188 transitions. [2022-01-31 10:15:04,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 188 transitions. [2022-01-31 10:15:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 10:15:04,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:15:04,748 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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, 1] [2022-01-31 10:15:04,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 10:15:04,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:04,948 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:15:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:15:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2037123798, now seen corresponding path program 10 times [2022-01-31 10:15:04,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:15:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082653236] [2022-01-31 10:15:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:15:04,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:15:04,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:15:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658736393] [2022-01-31 10:15:04,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:15:04,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:15:04,966 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:15:04,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:15:05,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:15:05,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:15:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:15:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:15:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:15:05,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:15:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-31 10:15:05,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:15:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082653236] [2022-01-31 10:15:05,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:15:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658736393] [2022-01-31 10:15:05,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658736393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:15:05,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:15:05,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 10:15:05,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600533996] [2022-01-31 10:15:05,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:15:05,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:15:05,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:15:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:15:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:15:05,440 INFO L87 Difference]: Start difference. First operand 166 states and 188 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:15:05,842 INFO L93 Difference]: Finished difference Result 167 states and 187 transitions. [2022-01-31 10:15:05,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 10:15:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2022-01-31 10:15:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:15:05,844 INFO L225 Difference]: With dead ends: 167 [2022-01-31 10:15:05,844 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 10:15:05,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:15:05,845 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 64 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:15:05,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 195 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 10:15:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 10:15:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 151. [2022-01-31 10:15:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 132 states have (on average 1.1136363636363635) internal successors, (147), 132 states have internal predecessors, (147), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:15:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 169 transitions. [2022-01-31 10:15:05,848 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 169 transitions. Word has length 71 [2022-01-31 10:15:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:15:05,848 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 169 transitions. [2022-01-31 10:15:05,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:15:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 169 transitions. [2022-01-31 10:15:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 10:15:05,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:15:05,849 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:15:05,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-31 10:15:06,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:06,050 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:15:06,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:15:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 311848902, now seen corresponding path program 1 times [2022-01-31 10:15:06,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:15:06,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413717641] [2022-01-31 10:15:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:15:06,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:15:06,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:15:06,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888576008] [2022-01-31 10:15:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:15:06,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:15:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:15:06,067 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:15:06,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:15:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:15:08,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 109 conjunts are in the unsatisfiable core [2022-01-31 10:15:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:15:08,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:15:08,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-01-31 10:15:08,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:08,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 69 [2022-01-31 10:15:08,935 INFO L353 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2022-01-31 10:15:08,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 88 [2022-01-31 10:15:08,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:08,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 7 [2022-01-31 10:15:09,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 68 [2022-01-31 10:15:09,293 INFO L353 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2022-01-31 10:15:09,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 89 [2022-01-31 10:15:09,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 12 [2022-01-31 10:15:09,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 10:15:09,517 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2022-01-31 10:15:09,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 104 [2022-01-31 10:15:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:09,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2022-01-31 10:15:29,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 91 [2022-01-31 10:15:29,641 INFO L353 Elim1Store]: treesize reduction 437, result has 21.7 percent of original size [2022-01-31 10:15:29,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 90 treesize of output 191 [2022-01-31 10:15:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:29,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:15:29,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 68 [2022-01-31 10:15:34,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 269 [2022-01-31 10:15:35,952 INFO L353 Elim1Store]: treesize reduction 1653, result has 12.1 percent of original size [2022-01-31 10:15:35,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 272 treesize of output 471 [2022-01-31 10:15:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 41 [2022-01-31 10:15:36,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 82 [2022-01-31 10:15:36,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:15:36,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 170 [2022-01-31 10:16:18,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 214 [2022-01-31 10:16:20,056 INFO L353 Elim1Store]: treesize reduction 1031, result has 14.7 percent of original size [2022-01-31 10:16:20,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 213 treesize of output 338 [2022-01-31 10:16:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,473 INFO L353 Elim1Store]: treesize reduction 79, result has 20.2 percent of original size [2022-01-31 10:16:22,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 63 [2022-01-31 10:16:22,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:16:22,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,731 INFO L353 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2022-01-31 10:16:22,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 56 [2022-01-31 10:16:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:22,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:16:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 31 [2022-01-31 10:16:23,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,512 INFO L353 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-01-31 10:16:23,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 1 [2022-01-31 10:16:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:16:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:23,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2022-01-31 10:16:27,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 412 treesize of output 377 [2022-01-31 10:16:32,191 INFO L353 Elim1Store]: treesize reduction 2155, result has 11.6 percent of original size [2022-01-31 10:16:32,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 39 case distinctions, treesize of input 380 treesize of output 528 [2022-01-31 10:16:32,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:32,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:33,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:33,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:33,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:34,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:34,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:16:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:36,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:16:36,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 353 treesize of output 344 [2022-01-31 10:16:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:16:39,926 INFO L353 Elim1Store]: treesize reduction 77, result has 1.3 percent of original size [2022-01-31 10:16:39,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 537 treesize of output 416 [2022-01-31 10:16:40,642 INFO L353 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2022-01-31 10:16:40,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 481 treesize of output 353 [2022-01-31 10:18:16,695 WARN L228 SmtUtils]: Spent 47.28s on a formula simplification. DAG size of input: 194 DAG size of output: 136 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-31 10:18:16,696 INFO L353 Elim1Store]: treesize reduction 352, result has 66.2 percent of original size [2022-01-31 10:18:16,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 473 treesize of output 939