/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/array13_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:06:09,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:06:09,829 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:06:09,911 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:06:09,912 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:06:09,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:06:09,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:06:09,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:06:09,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:06:09,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:06:09,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:06:09,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:06:09,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:06:09,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:06:09,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:06:09,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:06:09,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:06:09,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:06:09,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:06:09,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:06:09,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:06:09,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:06:09,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:06:09,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:06:09,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:06:09,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:06:09,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:06:09,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:06:09,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:06:09,971 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:06:09,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:06:09,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:06:09,973 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:06:09,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:06:09,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:06:09,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:06:09,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:06:09,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:06:09,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:06:09,974 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:06:09,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:06:09,974 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:06:09,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:06:09,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:06:09,975 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:06:09,975 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:06:09,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:06:09,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:06:09,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:06:09,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:06:09,976 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:06:09,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:06:10,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:06:10,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:06:10,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:06:10,250 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:06:10,250 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:06:10,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array13_pattern.c [2022-01-31 10:06:10,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f5c30c5/72a1cab5a25d498bb44a4393396d9da2/FLAG4ab12e15c [2022-01-31 10:06:10,715 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:06:10,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array13_pattern.c [2022-01-31 10:06:10,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f5c30c5/72a1cab5a25d498bb44a4393396d9da2/FLAG4ab12e15c [2022-01-31 10:06:10,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f5c30c5/72a1cab5a25d498bb44a4393396d9da2 [2022-01-31 10:06:10,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:06:10,754 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:06:10,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:06:10,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:06:10,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:06:10,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:06:10" (1/1) ... [2022-01-31 10:06:10,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130c3408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:10, skipping insertion in model container [2022-01-31 10:06:10,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:06:10" (1/1) ... [2022-01-31 10:06:10,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:06:10,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:06:10,971 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/array13_pattern.c[1342,1355] [2022-01-31 10:06:11,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:06:11,017 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:06:11,029 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/array13_pattern.c[1342,1355] [2022-01-31 10:06:11,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:06:11,063 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:06:11,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11 WrapperNode [2022-01-31 10:06:11,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:06:11,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:06:11,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:06:11,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:06:11,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:06:11,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:06:11,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:06:11,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:06:11,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:06:11,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:11,144 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 10:06:11,171 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 10:06:11,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:06:11,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:06:11,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:06:11,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:06:11,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:06:11,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:06:11,194 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:06:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:06:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:06:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:06:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:06:11,195 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:06:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:06:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:06:11,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:06:11,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:06:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:06:11,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:06:11,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:06:11,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:06:11,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:06:11,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:06:11,273 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:06:11,274 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:06:11,485 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:06:11,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:06:11,490 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 10:06:11,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:06:11 BoogieIcfgContainer [2022-01-31 10:06:11,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:06:11,492 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:06:11,492 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:06:11,508 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:06:11,511 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:06:11" (1/1) ... [2022-01-31 10:06:11,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:06:11 BasicIcfg [2022-01-31 10:06:11,527 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:06:11,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:06:11,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:06:11,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:06:11,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:06:10" (1/4) ... [2022-01-31 10:06:11,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b0615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:06:11, skipping insertion in model container [2022-01-31 10:06:11,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:06:11" (2/4) ... [2022-01-31 10:06:11,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b0615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:06:11, skipping insertion in model container [2022-01-31 10:06:11,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:06:11" (3/4) ... [2022-01-31 10:06:11,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b0615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:06:11, skipping insertion in model container [2022-01-31 10:06:11,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:06:11" (4/4) ... [2022-01-31 10:06:11,533 INFO L111 eAbstractionObserver]: Analyzing ICFG array13_pattern.cJordan [2022-01-31 10:06:11,537 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:06:11,537 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:06:11,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:06:11,574 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 10:06:11,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:06:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 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 10:06:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:06:11,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:11,614 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 10:06:11,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1479868354, now seen corresponding path program 1 times [2022-01-31 10:06:11,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:11,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65567795] [2022-01-31 10:06:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:11,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:11,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:06:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:11,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:06:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:11,836 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 10:06:11,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:11,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65567795] [2022-01-31 10:06:11,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65567795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:06:11,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:06:11,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:06:11,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413340979] [2022-01-31 10:06:11,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:06:11,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:06:11,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:06:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:06:11,868 INFO L87 Difference]: Start difference. First operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 28 states have internal predecessors, (42), 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 10:06:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:11,951 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-01-31 10:06:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:06:11,954 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 10:06:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:11,959 INFO L225 Difference]: With dead ends: 39 [2022-01-31 10:06:11,959 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 10:06:11,961 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 10:06:11,965 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:11,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 50 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 10:06:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 10:06:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 10:06:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-01-31 10:06:11,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2022-01-31 10:06:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:12,000 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-01-31 10:06:12,001 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 10:06:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-01-31 10:06:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:06:12,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:12,003 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] [2022-01-31 10:06:12,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:06:12,004 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:12,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1245074166, now seen corresponding path program 1 times [2022-01-31 10:06:12,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:12,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033724442] [2022-01-31 10:06:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:12,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:12,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:12,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654707685] [2022-01-31 10:06:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:12,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:12,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:12,047 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 10:06:12,090 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 10:06:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:12,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 10:06:12,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:06:12,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:06:12,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:12,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033724442] [2022-01-31 10:06:12,287 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:12,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654707685] [2022-01-31 10:06:12,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654707685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:06:12,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:06:12,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 10:06:12,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495863410] [2022-01-31 10:06:12,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:06:12,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 10:06:12,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 10:06:12,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:06:12,290 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:06:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:12,397 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-01-31 10:06:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:06:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-01-31 10:06:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:12,400 INFO L225 Difference]: With dead ends: 44 [2022-01-31 10:06:12,403 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 10:06:12,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:06:12,410 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:12,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 83 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 10:06:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-01-31 10:06:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 10:06:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-31 10:06:12,421 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 33 [2022-01-31 10:06:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:12,421 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-31 10:06:12,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:06:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-31 10:06:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 10:06:12,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:12,425 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] [2022-01-31 10:06:12,453 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 10:06:12,639 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 10:06:12,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:12,640 INFO L85 PathProgramCache]: Analyzing trace with hash 555258906, now seen corresponding path program 1 times [2022-01-31 10:06:12,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:12,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907292591] [2022-01-31 10:06:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:12,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:12,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:12,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127934365] [2022-01-31 10:06:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:12,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:12,656 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 10:06:12,675 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 10:06:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:06:12,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:12,802 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 10:06:12,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:06:12,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907292591] [2022-01-31 10:06:12,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127934365] [2022-01-31 10:06:12,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127934365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:06:12,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:06:12,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:06:12,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005158462] [2022-01-31 10:06:12,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:06:12,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:06:12,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:12,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:06:12,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:06:12,804 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 10:06:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:12,839 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-01-31 10:06:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 10:06:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 39 [2022-01-31 10:06:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:12,840 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:06:12,840 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 10:06:12,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 10:06:12,841 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:12,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 68 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:06:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 10:06:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-31 10:06:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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 10:06:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-31 10:06:12,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 39 [2022-01-31 10:06:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:12,849 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-31 10:06:12,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 10:06:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-31 10:06:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:06:12,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:12,851 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 10:06:12,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:13,077 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 10:06:13,077 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:13,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1494551782, now seen corresponding path program 1 times [2022-01-31 10:06:13,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:13,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822146174] [2022-01-31 10:06:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:13,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:13,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:13,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280789228] [2022-01-31 10:06:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:13,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:13,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:13,100 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 10:06:13,101 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 10:06:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:06:13,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:13,374 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 10:06:13,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:13,715 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 10:06:13,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822146174] [2022-01-31 10:06:13,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280789228] [2022-01-31 10:06:13,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280789228] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:13,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:13,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-01-31 10:06:13,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448021144] [2022-01-31 10:06:13,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:13,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:06:13,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:06:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:06:13,717 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 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 10:06:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:14,133 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2022-01-31 10:06:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 10:06:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 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 43 [2022-01-31 10:06:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:14,136 INFO L225 Difference]: With dead ends: 109 [2022-01-31 10:06:14,136 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 10:06:14,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-01-31 10:06:14,137 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 119 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:14,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 214 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:06:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 10:06:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 63. [2022-01-31 10:06:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 49 states have internal predecessors, (58), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:06:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2022-01-31 10:06:14,145 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2022-01-31 10:06:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:14,146 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2022-01-31 10:06:14,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 13 states have internal predecessors, (40), 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 10:06:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2022-01-31 10:06:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 10:06:14,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:14,147 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 10:06:14,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:14,369 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 10:06:14,369 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2000110407, now seen corresponding path program 1 times [2022-01-31 10:06:14,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:14,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045657086] [2022-01-31 10:06:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:14,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:14,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:14,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857314559] [2022-01-31 10:06:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:14,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:14,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:14,384 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 10:06:14,386 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 10:06:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:06:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 10:06:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:14,573 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 10:06:14,580 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-01-31 10:06:14,882 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 98 treesize of output 87 [2022-01-31 10:06:14,930 INFO L353 Elim1Store]: treesize reduction 152, result has 22.1 percent of original size [2022-01-31 10:06:14,930 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 4 case distinctions, treesize of input 86 treesize of output 104 [2022-01-31 10:06:15,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:06:15,063 INFO L353 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-01-31 10:06:15,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 99 [2022-01-31 10:06:15,168 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 40 treesize of output 28 [2022-01-31 10:06:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:06:15,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:15,877 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 56 treesize of output 52 [2022-01-31 10:06:15,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:06:15,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2022-01-31 10:06:15,915 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 32 treesize of output 19 [2022-01-31 10:06:15,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:06:15,944 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 48 treesize of output 52 [2022-01-31 10:06:16,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:06:16,042 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 92 treesize of output 81 [2022-01-31 10:06:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:06:20,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:20,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045657086] [2022-01-31 10:06:20,376 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:20,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857314559] [2022-01-31 10:06:20,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857314559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:20,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:20,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2022-01-31 10:06:20,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321046191] [2022-01-31 10:06:20,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:20,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 10:06:20,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:20,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 10:06:20,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=402, Unknown=1, NotChecked=0, Total=506 [2022-01-31 10:06:20,378 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:06:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:22,872 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2022-01-31 10:06:22,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 10:06:22,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-01-31 10:06:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:22,874 INFO L225 Difference]: With dead ends: 130 [2022-01-31 10:06:22,874 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 10:06:22,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=357, Invalid=1202, Unknown=1, NotChecked=0, Total=1560 [2022-01-31 10:06:22,875 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 94 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:22,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 293 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 322 Invalid, 0 Unknown, 157 Unchecked, 0.9s Time] [2022-01-31 10:06:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 10:06:22,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2022-01-31 10:06:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 59 states have internal predecessors, (71), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:06:22,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-01-31 10:06:22,883 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 43 [2022-01-31 10:06:22,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:22,884 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-01-31 10:06:22,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:06:22,884 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-01-31 10:06:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:06:22,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:22,885 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] [2022-01-31 10:06:22,906 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 10:06:23,099 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 10:06:23,099 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash -212920108, now seen corresponding path program 2 times [2022-01-31 10:06:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462541772] [2022-01-31 10:06:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:23,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:23,112 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556765921] [2022-01-31 10:06:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:06:23,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:23,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:23,113 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 10:06:23,116 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 10:06:23,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:06:23,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:06:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:23,292 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 10:06:23,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:23,382 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 10:06:23,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:23,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462541772] [2022-01-31 10:06:23,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:23,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556765921] [2022-01-31 10:06:23,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556765921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:23,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:23,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:06:23,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023220878] [2022-01-31 10:06:23,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:23,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:06:23,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:06:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:06:23,385 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 10:06:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:23,532 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2022-01-31 10:06:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:06:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 45 [2022-01-31 10:06:23,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:23,534 INFO L225 Difference]: With dead ends: 112 [2022-01-31 10:06:23,534 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 10:06:23,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 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 10:06:23,535 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 89 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:23,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 133 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:23,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 10:06:23,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2022-01-31 10:06:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 72 states have internal predecessors, (85), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:06:23,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2022-01-31 10:06:23,542 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 45 [2022-01-31 10:06:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:23,543 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2022-01-31 10:06:23,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 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 10:06:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2022-01-31 10:06:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:06:23,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:23,553 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] [2022-01-31 10:06:23,579 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 10:06:23,753 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 10:06:23,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 789976319, now seen corresponding path program 2 times [2022-01-31 10:06:23,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:23,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649163265] [2022-01-31 10:06:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:23,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:23,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:23,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344016466] [2022-01-31 10:06:23,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:06:23,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:23,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:23,774 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 10:06:23,775 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 10:06:23,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:06:23,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:06:23,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:23,937 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 10:06:23,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:24,039 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 10:06:24,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649163265] [2022-01-31 10:06:24,040 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:24,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344016466] [2022-01-31 10:06:24,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344016466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:24,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:24,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-31 10:06:24,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183006563] [2022-01-31 10:06:24,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:24,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 10:06:24,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:24,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 10:06:24,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:06:24,042 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 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 10:06:24,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:24,227 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2022-01-31 10:06:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:06:24,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 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 45 [2022-01-31 10:06:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:24,228 INFO L225 Difference]: With dead ends: 118 [2022-01-31 10:06:24,228 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 10:06:24,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 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 10:06:24,229 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:24,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 106 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 10:06:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2022-01-31 10:06:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 86 states have internal predecessors, (103), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:06:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2022-01-31 10:06:24,237 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 45 [2022-01-31 10:06:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:24,237 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2022-01-31 10:06:24,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 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 10:06:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2022-01-31 10:06:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:06:24,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:24,238 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] [2022-01-31 10:06:24,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:24,451 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 10:06:24,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 724997950, now seen corresponding path program 3 times [2022-01-31 10:06:24,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131971127] [2022-01-31 10:06:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:24,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:24,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:24,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901115398] [2022-01-31 10:06:24,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:06:24,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:24,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:24,463 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 10:06:24,465 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 10:06:24,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:06:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:06:24,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 10:06:24,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 10:06:24,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131971127] [2022-01-31 10:06:24,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901115398] [2022-01-31 10:06:24,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901115398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:24,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:24,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:06:24,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689088864] [2022-01-31 10:06:24,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:24,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:06:24,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:24,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:06:24,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:06:24,781 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 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 10:06:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:24,883 INFO L93 Difference]: Finished difference Result 154 states and 181 transitions. [2022-01-31 10:06:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:06:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 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 48 [2022-01-31 10:06:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:24,886 INFO L225 Difference]: With dead ends: 154 [2022-01-31 10:06:24,886 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 10:06:24,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 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 10:06:24,887 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:24,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 158 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 10:06:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2022-01-31 10:06:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.206896551724138) internal successors, (105), 88 states have internal predecessors, (105), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:06:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-01-31 10:06:24,893 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 48 [2022-01-31 10:06:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:24,894 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-01-31 10:06:24,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 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 10:06:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-01-31 10:06:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 10:06:24,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:24,895 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] [2022-01-31 10:06:24,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:25,107 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 10:06:25,108 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:25,108 INFO L85 PathProgramCache]: Analyzing trace with hash 729075021, now seen corresponding path program 3 times [2022-01-31 10:06:25,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:25,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35879618] [2022-01-31 10:06:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:25,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:25,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:25,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993548146] [2022-01-31 10:06:25,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:06:25,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:25,123 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 10:06:25,128 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 10:06:25,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:06:25,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 10:06:25,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:25,349 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 10:06:25,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:25,618 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 10:06:25,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35879618] [2022-01-31 10:06:25,618 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:25,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993548146] [2022-01-31 10:06:25,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993548146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:25,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:25,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-01-31 10:06:25,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489631580] [2022-01-31 10:06:25,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 10:06:25,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 10:06:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:06:25,620 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 14 states have internal predecessors, (46), 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 10:06:25,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:25,939 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2022-01-31 10:06:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 10:06:25,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 14 states have internal predecessors, (46), 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 52 [2022-01-31 10:06:25,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:25,941 INFO L225 Difference]: With dead ends: 142 [2022-01-31 10:06:25,941 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 10:06:25,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 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 10:06:25,942 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 117 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:25,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 229 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:06:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 10:06:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2022-01-31 10:06:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:06:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2022-01-31 10:06:25,948 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 52 [2022-01-31 10:06:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:25,948 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2022-01-31 10:06:25,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 14 states have internal predecessors, (46), 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 10:06:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2022-01-31 10:06:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 10:06:25,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:25,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 10:06:25,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 10:06:26,163 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 10:06:26,163 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2083091317, now seen corresponding path program 4 times [2022-01-31 10:06:26,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:26,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177680600] [2022-01-31 10:06:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:26,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:26,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:26,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868215411] [2022-01-31 10:06:26,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:06:26,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:26,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:26,175 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 10:06:26,189 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 10:06:26,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:06:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:26,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:06:26,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:06:26,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:06:26,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:26,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177680600] [2022-01-31 10:06:26,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:26,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868215411] [2022-01-31 10:06:26,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868215411] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:26,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:26,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:06:26,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550670991] [2022-01-31 10:06:26,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:26,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:06:26,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:06:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:06:26,455 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 10:06:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:26,595 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2022-01-31 10:06:26,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:06:26,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 53 [2022-01-31 10:06:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:26,597 INFO L225 Difference]: With dead ends: 104 [2022-01-31 10:06:26,597 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 10:06:26,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 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 10:06:26,598 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:26,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 135 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 10:06:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-01-31 10:06:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.2) internal successors, (66), 55 states have internal predecessors, (66), 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 10:06:26,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-01-31 10:06:26,603 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 53 [2022-01-31 10:06:26,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:26,603 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-01-31 10:06:26,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 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 10:06:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-01-31 10:06:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 10:06:26,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:26,604 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] [2022-01-31 10:06:26,629 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 10:06:26,815 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 10:06:26,815 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1641954518, now seen corresponding path program 4 times [2022-01-31 10:06:26,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685069411] [2022-01-31 10:06:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:26,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:26,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339848736] [2022-01-31 10:06:26,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:06:26,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:26,829 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 10:06:26,850 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 10:06:26,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:06:26,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:26,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:06:26,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 10:06:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 10:06:27,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685069411] [2022-01-31 10:06:27,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339848736] [2022-01-31 10:06:27,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339848736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:27,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:27,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-31 10:06:27,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238362578] [2022-01-31 10:06:27,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:27,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 10:06:27,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 10:06:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:06:27,085 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 10:06:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:27,214 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-01-31 10:06:27,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:06:27,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 57 [2022-01-31 10:06:27,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:27,215 INFO L225 Difference]: With dead ends: 67 [2022-01-31 10:06:27,215 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 10:06:27,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:06:27,216 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:27,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 162 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 10:06:27,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-01-31 10:06:27,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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 10:06:27,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-01-31 10:06:27,219 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 57 [2022-01-31 10:06:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:27,219 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-01-31 10:06:27,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 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 10:06:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-01-31 10:06:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 10:06:27,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:27,220 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2022-01-31 10:06:27,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:06:27,428 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 10:06:27,429 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -181635857, now seen corresponding path program 5 times [2022-01-31 10:06:27,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:27,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126627786] [2022-01-31 10:06:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:27,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:27,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:27,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645185955] [2022-01-31 10:06:27,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:06:27,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:27,440 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 10:06:27,441 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 10:06:27,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:06:27,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:06:27,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:06:27,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:06:27,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:27,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126627786] [2022-01-31 10:06:27,751 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:27,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645185955] [2022-01-31 10:06:27,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645185955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:06:27,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:06:27,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:06:27,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538389014] [2022-01-31 10:06:27,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:27,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:06:27,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:06:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:06:27,753 INFO L87 Difference]: Start difference. First operand 60 states and 69 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 10:06:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:27,903 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-01-31 10:06:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 10:06:27,903 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 59 [2022-01-31 10:06:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:27,903 INFO L225 Difference]: With dead ends: 61 [2022-01-31 10:06:27,903 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 10:06:27,904 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 10:06:27,904 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:27,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 157 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:06:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 10:06:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-01-31 10:06:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 10:06:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-01-31 10:06:27,907 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 59 [2022-01-31 10:06:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-01-31 10:06:27,908 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 10:06:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-01-31 10:06:27,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 10:06:27,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:27,908 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] [2022-01-31 10:06:27,928 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 10:06:28,123 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 10:06:28,123 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash -710567030, now seen corresponding path program 6 times [2022-01-31 10:06:28,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:28,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556485201] [2022-01-31 10:06:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:28,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:28,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158240448] [2022-01-31 10:06:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:06:28,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:28,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:28,134 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 10:06:28,137 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 10:06:28,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 10:06:28,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 78 conjunts are in the unsatisfiable core [2022-01-31 10:06:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:28,422 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 10:06:28,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:06:28,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 55 [2022-01-31 10:06:28,434 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 15 [2022-01-31 10:06:28,458 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 45 treesize of output 21 [2022-01-31 10:06:28,516 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 10:06:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:06:28,556 INFO L353 Elim1Store]: treesize reduction 128, result has 25.1 percent of original size [2022-01-31 10:06:28,557 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 106 [2022-01-31 10:06:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,595 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 76 treesize of output 37 [2022-01-31 10:06:28,642 INFO L353 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-01-31 10:06:28,642 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 83 treesize of output 41 [2022-01-31 10:06:28,954 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 10:06:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:28,966 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 69 treesize of output 93 [2022-01-31 10:06:28,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:06:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,029 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 54 treesize of output 25 [2022-01-31 10:06:29,192 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 10:06:29,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,210 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 70 treesize of output 108 [2022-01-31 10:06:29,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:06:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:29,291 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 59 treesize of output 28 [2022-01-31 10:06:30,446 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 10:06:30,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,522 INFO L353 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-01-31 10:06:30,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 14 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 163 [2022-01-31 10:06:30,624 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:30,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:30,964 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 95 treesize of output 49 [2022-01-31 10:06:31,057 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:31,298 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:31,530 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:31,792 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:32,130 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:32,427 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:32,682 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:33,056 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:33,259 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:33,485 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:33,732 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:34,007 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:34,357 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:06:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:06:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:34,657 INFO L353 Elim1Store]: treesize reduction 88, result has 58.9 percent of original size [2022-01-31 10:06:34,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 20 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 154 treesize of output 189 [2022-01-31 10:06:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:06:37,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:06:45,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:06:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556485201] [2022-01-31 10:06:45,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:06:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158240448] [2022-01-31 10:06:45,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158240448] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:06:45,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:06:45,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-01-31 10:06:45,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062358001] [2022-01-31 10:06:45,185 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:06:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 10:06:45,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:06:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 10:06:45,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2377, Unknown=1, NotChecked=0, Total=2756 [2022-01-31 10:06:45,187 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 36 states, 34 states have (on average 1.411764705882353) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (6), 4 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 10:06:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:06:45,515 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2022-01-31 10:06:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 10:06:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.411764705882353) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-01-31 10:06:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:06:45,516 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:06:45,516 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 10:06:45,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=404, Invalid=2675, Unknown=1, NotChecked=0, Total=3080 [2022-01-31 10:06:45,518 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:06:45,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 361 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 380 Unchecked, 0.1s Time] [2022-01-31 10:06:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 10:06:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2022-01-31 10:06:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 76 states have internal predecessors, (90), 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 10:06:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2022-01-31 10:06:45,522 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 61 [2022-01-31 10:06:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:06:45,522 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2022-01-31 10:06:45,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.411764705882353) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (6), 4 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 10:06:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2022-01-31 10:06:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 10:06:45,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:06:45,523 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] [2022-01-31 10:06:45,547 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 10:06:45,742 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 10:06:45,743 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:06:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:06:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash 534197451, now seen corresponding path program 5 times [2022-01-31 10:06:45,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:06:45,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004439266] [2022-01-31 10:06:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:06:45,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:06:45,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:06:45,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508778116] [2022-01-31 10:06:45,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:06:45,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:06:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:06:45,756 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 10:06:45,758 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 10:06:46,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 10:06:46,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:06:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 10:06:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:06:46,187 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 10:06:46,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-01-31 10:06:46,198 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 31 treesize of output 18 [2022-01-31 10:06:46,219 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 52 treesize of output 22 [2022-01-31 10:06:46,289 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 10:06:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:06:46,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 94 [2022-01-31 10:06:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,319 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 34 [2022-01-31 10:06:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,346 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 98 treesize of output 44 [2022-01-31 10:06:46,541 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 10:06:46,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,552 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 10:06:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,562 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 68 treesize of output 32 [2022-01-31 10:06:46,687 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 10:06:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,701 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 10:06:46,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:06:46,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:46,769 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 79 treesize of output 50 [2022-01-31 10:06:47,342 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 10:06:47,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:47,534 INFO L353 Elim1Store]: treesize reduction 479, result has 25.7 percent of original size [2022-01-31 10:06:47,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 116 treesize of output 236 [2022-01-31 10:06:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:48,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:48,352 INFO L353 Elim1Store]: treesize reduction 280, result has 0.4 percent of original size [2022-01-31 10:06:48,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 156 treesize of output 57 [2022-01-31 10:06:49,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:06:49,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:06:49,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:06:49,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:06:49,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 111 treesize of output 49 [2022-01-31 10:06:49,651 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 10:06:49,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:01,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004439266] [2022-01-31 10:07:01,246 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:07:01,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508778116] [2022-01-31 10:07:01,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508778116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:01,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:07:01,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-01-31 10:07:01,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757941347] [2022-01-31 10:07:01,246 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:01,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 10:07:01,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 10:07:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1627, Unknown=3, NotChecked=0, Total=1892 [2022-01-31 10:07:01,247 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 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 10:07:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:02,804 INFO L93 Difference]: Finished difference Result 164 states and 197 transitions. [2022-01-31 10:07:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 10:07:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 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 61 [2022-01-31 10:07:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:02,805 INFO L225 Difference]: With dead ends: 164 [2022-01-31 10:07:02,805 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 10:07:02,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=436, Invalid=2317, Unknown=3, NotChecked=0, Total=2756 [2022-01-31 10:07:02,806 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:02,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 438 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 491 Invalid, 0 Unknown, 156 Unchecked, 0.6s Time] [2022-01-31 10:07:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 10:07:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 125. [2022-01-31 10:07:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.2075471698113207) internal successors, (128), 106 states have internal predecessors, (128), 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 10:07:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2022-01-31 10:07:02,811 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 61 [2022-01-31 10:07:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:02,812 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2022-01-31 10:07:02,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 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 10:07:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2022-01-31 10:07:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 10:07:02,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:02,812 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] [2022-01-31 10:07:02,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-31 10:07:03,027 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 10:07:03,027 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:03,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2087683941, now seen corresponding path program 7 times [2022-01-31 10:07:03,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:03,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843990517] [2022-01-31 10:07:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:03,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:03,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:07:03,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307937732] [2022-01-31 10:07:03,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:07:03,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:03,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:03,047 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 10:07:03,054 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 10:07:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:03,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:07:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:03,245 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 10:07:03,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:03,369 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 10:07:03,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843990517] [2022-01-31 10:07:03,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:07:03,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307937732] [2022-01-31 10:07:03,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307937732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:03,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:07:03,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:07:03,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466965090] [2022-01-31 10:07:03,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:03,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:07:03,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:07:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:07:03,370 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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 10:07:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:03,530 INFO L93 Difference]: Finished difference Result 192 states and 227 transitions. [2022-01-31 10:07:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:07:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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 63 [2022-01-31 10:07:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:03,531 INFO L225 Difference]: With dead ends: 192 [2022-01-31 10:07:03,531 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 10:07:03,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 115 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 10:07:03,532 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:03,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 131 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:07:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 10:07:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 158. [2022-01-31 10:07:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 136 states have (on average 1.1838235294117647) internal successors, (161), 136 states have internal predecessors, (161), 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 10:07:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 187 transitions. [2022-01-31 10:07:03,537 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 187 transitions. Word has length 63 [2022-01-31 10:07:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:03,538 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 187 transitions. [2022-01-31 10:07:03,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 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 10:07:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 187 transitions. [2022-01-31 10:07:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 10:07:03,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:03,539 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] [2022-01-31 10:07:03,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-31 10:07:03,747 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 10:07:03,747 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash 54888304, now seen corresponding path program 6 times [2022-01-31 10:07:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:03,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132914209] [2022-01-31 10:07:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:03,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:03,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:07:03,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39966177] [2022-01-31 10:07:03,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:07:03,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:03,757 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 10:07:03,770 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 10:07:03,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 10:07:03,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:03,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:07:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 10:07:04,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 10:07:04,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132914209] [2022-01-31 10:07:04,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:07:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39966177] [2022-01-31 10:07:04,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39966177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:04,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:07:04,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:07:04,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821034556] [2022-01-31 10:07:04,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:04,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:07:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:07:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:07:04,162 INFO L87 Difference]: Start difference. First operand 158 states and 187 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 10:07:04,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:04,407 INFO L93 Difference]: Finished difference Result 237 states and 274 transitions. [2022-01-31 10:07:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:07:04,416 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 63 [2022-01-31 10:07:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:04,417 INFO L225 Difference]: With dead ends: 237 [2022-01-31 10:07:04,417 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 10:07:04,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2022-01-31 10:07:04,418 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:04,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 156 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:07:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 10:07:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2022-01-31 10:07:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 140 states have internal predecessors, (166), 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 10:07:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2022-01-31 10:07:04,424 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 63 [2022-01-31 10:07:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:04,424 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2022-01-31 10:07:04,424 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 10:07:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2022-01-31 10:07:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 10:07:04,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:04,425 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] [2022-01-31 10:07:04,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-31 10:07:04,629 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 10:07:04,629 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1995216344, now seen corresponding path program 8 times [2022-01-31 10:07:04,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:04,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850387631] [2022-01-31 10:07:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:04,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:04,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:07:04,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345000341] [2022-01-31 10:07:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:07:04,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:04,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:04,642 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 10:07:04,644 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 10:07:04,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:07:04,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:07:04,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:04,849 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 10:07:04,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:04,972 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 10:07:04,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850387631] [2022-01-31 10:07:04,973 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:07:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345000341] [2022-01-31 10:07:04,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345000341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:04,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:07:04,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:07:04,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866265138] [2022-01-31 10:07:04,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:04,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:07:04,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:04,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:07:04,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:07:04,974 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 10:07:05,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:05,162 INFO L93 Difference]: Finished difference Result 197 states and 225 transitions. [2022-01-31 10:07:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:07:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 68 [2022-01-31 10:07:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:05,164 INFO L225 Difference]: With dead ends: 197 [2022-01-31 10:07:05,164 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 10:07:05,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-01-31 10:07:05,165 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:05,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 145 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:07:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 10:07:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2022-01-31 10:07:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 134 states have internal predecessors, (154), 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 10:07:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2022-01-31 10:07:05,171 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 68 [2022-01-31 10:07:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:05,171 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2022-01-31 10:07:05,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 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 10:07:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2022-01-31 10:07:05,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 10:07:05,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:05,172 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] [2022-01-31 10:07:05,192 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 10:07:05,387 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 10:07:05,387 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash 22411224, now seen corresponding path program 9 times [2022-01-31 10:07:05,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:05,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134386016] [2022-01-31 10:07:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:05,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:05,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:07:05,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155030857] [2022-01-31 10:07:05,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:07:05,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:05,397 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 10:07:05,399 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 10:07:06,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 10:07:06,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:07:06,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:07:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-31 10:07:06,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 10:07:06,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:06,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134386016] [2022-01-31 10:07:06,568 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:07:06,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155030857] [2022-01-31 10:07:06,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155030857] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:07:06,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:07:06,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:07:06,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571092567] [2022-01-31 10:07:06,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:06,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:07:06,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:06,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:07:06,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:07:06,570 INFO L87 Difference]: Start difference. First operand 153 states and 176 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 10:07:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:06,850 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2022-01-31 10:07:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 10:07:06,850 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 68 [2022-01-31 10:07:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:06,851 INFO L225 Difference]: With dead ends: 197 [2022-01-31 10:07:06,851 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 10:07:06,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2022-01-31 10:07:06,852 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:06,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 198 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:07:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 10:07:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 130. [2022-01-31 10:07:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.1261261261261262) internal successors, (125), 111 states have internal predecessors, (125), 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 10:07:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 147 transitions. [2022-01-31 10:07:06,856 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 147 transitions. Word has length 68 [2022-01-31 10:07:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:06,857 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 147 transitions. [2022-01-31 10:07:06,857 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 10:07:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 147 transitions. [2022-01-31 10:07:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 10:07:06,858 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:06,858 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:07:06,863 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 10:07:07,063 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 10:07:07,064 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash -504836298, now seen corresponding path program 1 times [2022-01-31 10:07:07,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:07,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694909901] [2022-01-31 10:07:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:07,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:07,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:07:07,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074669931] [2022-01-31 10:07:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:07,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:07,075 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 10:07:07,083 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 10:07:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:07,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 80 conjunts are in the unsatisfiable core [2022-01-31 10:07:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:07,920 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 10:07:07,924 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 10:07:07,930 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 10:07:08,010 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 75 [2022-01-31 10:07:08,028 INFO L353 Elim1Store]: treesize reduction 160, result has 19.6 percent of original size [2022-01-31 10:07:08,029 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 74 treesize of output 100 [2022-01-31 10:07:08,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:07:08,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,066 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 71 treesize of output 25 [2022-01-31 10:07:08,305 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 98 treesize of output 89 [2022-01-31 10:07:08,348 INFO L353 Elim1Store]: treesize reduction 321, result has 17.3 percent of original size [2022-01-31 10:07:08,348 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 88 treesize of output 131 [2022-01-31 10:07:08,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,363 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 78 treesize of output 36 [2022-01-31 10:07:08,452 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 67 treesize of output 58 [2022-01-31 10:07:08,485 INFO L353 Elim1Store]: treesize reduction 134, result has 15.7 percent of original size [2022-01-31 10:07:08,485 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 57 treesize of output 79 [2022-01-31 10:07:08,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:07:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:08,516 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 47 treesize of output 26 [2022-01-31 10:07:09,114 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 91 treesize of output 80 [2022-01-31 10:07:09,241 INFO L353 Elim1Store]: treesize reduction 324, result has 13.1 percent of original size [2022-01-31 10:07:09,241 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 79 treesize of output 116 [2022-01-31 10:07:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,286 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 69 treesize of output 39 [2022-01-31 10:07:09,654 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 91 treesize of output 80 [2022-01-31 10:07:09,829 INFO L353 Elim1Store]: treesize reduction 324, result has 13.1 percent of original size [2022-01-31 10:07:09,829 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 79 treesize of output 116 [2022-01-31 10:07:09,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:07:09,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:09,904 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 103 treesize of output 58 [2022-01-31 10:07:11,195 INFO L353 Elim1Store]: treesize reduction 283, result has 1.0 percent of original size [2022-01-31 10:07:11,196 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 116 treesize of output 45 [2022-01-31 10:07:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 10:07:11,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:07:22,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:07:22,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694909901] [2022-01-31 10:07:22,319 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:07:22,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074669931] [2022-01-31 10:07:22,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074669931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:07:22,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:07:22,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-01-31 10:07:22,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527585208] [2022-01-31 10:07:22,320 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:07:22,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 10:07:22,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:07:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 10:07:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1909, Unknown=1, NotChecked=0, Total=2162 [2022-01-31 10:07:22,321 INFO L87 Difference]: Start difference. First operand 130 states and 147 transitions. Second operand has 33 states, 32 states have (on average 1.59375) internal successors, (51), 29 states have internal predecessors, (51), 5 states have call successors, (6), 4 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 10:07:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:07:26,523 INFO L93 Difference]: Finished difference Result 161 states and 180 transitions. [2022-01-31 10:07:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 10:07:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.59375) internal successors, (51), 29 states have internal predecessors, (51), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 75 [2022-01-31 10:07:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:07:26,525 INFO L225 Difference]: With dead ends: 161 [2022-01-31 10:07:26,525 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 10:07:26,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=355, Invalid=2836, Unknown=1, NotChecked=0, Total=3192 [2022-01-31 10:07:26,526 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:07:26,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 485 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 398 Invalid, 0 Unknown, 561 Unchecked, 0.5s Time] [2022-01-31 10:07:26,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 10:07:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2022-01-31 10:07:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 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 10:07:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2022-01-31 10:07:26,530 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 75 [2022-01-31 10:07:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:07:26,531 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2022-01-31 10:07:26,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.59375) internal successors, (51), 29 states have internal predecessors, (51), 5 states have call successors, (6), 4 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 10:07:26,531 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2022-01-31 10:07:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 10:07:26,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:07:26,532 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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, 1, 1] [2022-01-31 10:07:26,549 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 10:07:26,739 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 10:07:26,739 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:07:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:07:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash 739928183, now seen corresponding path program 1 times [2022-01-31 10:07:26,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:07:26,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287645884] [2022-01-31 10:07:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:26,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:07:26,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:07:26,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271300589] [2022-01-31 10:07:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:07:26,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:07:26,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:07:26,752 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 10:07:26,753 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 10:07:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:07:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-31 10:07:28,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:07:28,318 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 10:07:28,322 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 10:07:28,327 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 10:07:28,398 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 75 [2022-01-31 10:07:28,416 INFO L353 Elim1Store]: treesize reduction 160, result has 19.6 percent of original size [2022-01-31 10:07:28,416 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 74 treesize of output 100 [2022-01-31 10:07:28,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,438 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 54 treesize of output 23 [2022-01-31 10:07:28,620 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 10:07:28,649 INFO L353 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2022-01-31 10:07:28,649 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 10:07:28,665 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:07:28,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,681 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 40 treesize of output 17 [2022-01-31 10:07:28,789 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 10:07:28,834 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2022-01-31 10:07:28,835 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 10:07:28,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:07:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:28,878 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 68 treesize of output 39 [2022-01-31 10:07:42,857 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 10:07:43,534 INFO L353 Elim1Store]: treesize reduction 469, result has 15.9 percent of original size [2022-01-31 10:07:43,534 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 159 [2022-01-31 10:07:44,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:07:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:07:44,623 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 120 treesize of output 65 [2022-01-31 10:08:22,903 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 170 treesize of output 151 [2022-01-31 10:08:24,685 INFO L353 Elim1Store]: treesize reduction 808, result has 21.8 percent of original size [2022-01-31 10:08:24,686 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 26 case distinctions, treesize of input 150 treesize of output 316 [2022-01-31 10:08:31,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,397 INFO L353 Elim1Store]: treesize reduction 381, result has 5.5 percent of original size [2022-01-31 10:08:31,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 182 treesize of output 117 [2022-01-31 10:08:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:31,462 INFO L353 Elim1Store]: treesize reduction 314, result has 0.3 percent of original size [2022-01-31 10:08:31,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 163 treesize of output 84 [2022-01-31 10:09:08,578 INFO L353 Elim1Store]: treesize reduction 264, result has 7.7 percent of original size [2022-01-31 10:09:08,578 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 139 treesize of output 83 [2022-01-31 10:09:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 61 refuted. 14 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:09:09,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:10,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:10,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287645884] [2022-01-31 10:10:10,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:10,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271300589] [2022-01-31 10:10:10,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271300589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:10:10,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:10:10,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-01-31 10:10:10,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750358084] [2022-01-31 10:10:10,289 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:10,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 10:10:10,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 10:10:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1961, Unknown=39, NotChecked=0, Total=2256 [2022-01-31 10:10:10,291 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:10:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:13,576 INFO L93 Difference]: Finished difference Result 209 states and 234 transitions. [2022-01-31 10:10:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:10:13,577 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2022-01-31 10:10:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:13,578 INFO L225 Difference]: With dead ends: 209 [2022-01-31 10:10:13,578 INFO L226 Difference]: Without dead ends: 190 [2022-01-31 10:10:13,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 129.6s TimeCoverageRelationStatistics Valid=321, Invalid=2609, Unknown=40, NotChecked=0, Total=2970 [2022-01-31 10:10:13,579 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:13,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 277 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 274 Invalid, 0 Unknown, 291 Unchecked, 0.3s Time] [2022-01-31 10:10:13,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-31 10:10:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 166. [2022-01-31 10:10:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 136 states have (on average 1.125) internal successors, (153), 136 states have internal predecessors, (153), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 10:10:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2022-01-31 10:10:13,584 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 75 [2022-01-31 10:10:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:13,584 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2022-01-31 10:10:13,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:10:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2022-01-31 10:10:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 10:10:13,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:13,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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, 1, 1] [2022-01-31 10:10:13,605 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 10:10:13,799 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 10:10:13,799 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash -175070537, now seen corresponding path program 2 times [2022-01-31 10:10:13,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:13,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386702592] [2022-01-31 10:10:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:13,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:13,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:13,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827225571] [2022-01-31 10:10:13,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:10:13,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:13,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:13,808 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 10:10:13,809 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 10:10:14,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:10:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 83 conjunts are in the unsatisfiable core [2022-01-31 10:10:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:14,866 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 10:10:14,868 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 10:10:14,876 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 10:10:14,947 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 10:10:14,963 INFO L353 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2022-01-31 10:10:14,964 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 10:10:14,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:10:15,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,009 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 57 treesize of output 22 [2022-01-31 10:10:15,226 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 10:10:15,257 INFO L353 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2022-01-31 10:10:15,258 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 10:10:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,273 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 31 treesize of output 10 [2022-01-31 10:10:15,391 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 88 treesize of output 77 [2022-01-31 10:10:15,442 INFO L353 Elim1Store]: treesize reduction 308, result has 14.2 percent of original size [2022-01-31 10:10:15,443 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 76 treesize of output 114 [2022-01-31 10:10:15,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:10:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:15,499 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 98 treesize of output 54 [2022-01-31 10:10:16,523 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 10:10:16,683 INFO L353 Elim1Store]: treesize reduction 572, result has 22.5 percent of original size [2022-01-31 10:10:16,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 116 treesize of output 236 [2022-01-31 10:10:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:17,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:17,158 INFO L353 Elim1Store]: treesize reduction 280, result has 0.4 percent of original size [2022-01-31 10:10:17,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 152 treesize of output 82 [2022-01-31 10:10:19,796 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 10:10:19,937 INFO L353 Elim1Store]: treesize reduction 498, result has 10.8 percent of original size [2022-01-31 10:10:19,937 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 130 [2022-01-31 10:10:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:19,994 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 65 treesize of output 27 [2022-01-31 10:10:22,192 INFO L353 Elim1Store]: treesize reduction 450, result has 1.5 percent of original size [2022-01-31 10:10:22,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 116 treesize of output 46 [2022-01-31 10:10:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 10:10:22,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:29,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386702592] [2022-01-31 10:10:29,932 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827225571] [2022-01-31 10:10:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827225571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:10:29,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:10:29,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-01-31 10:10:29,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569582109] [2022-01-31 10:10:29,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:29,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 10:10:29,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:29,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 10:10:29,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=2375, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 10:10:29,936 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:10:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:31,238 INFO L93 Difference]: Finished difference Result 199 states and 219 transitions. [2022-01-31 10:10:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 10:10:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 75 [2022-01-31 10:10:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:31,239 INFO L225 Difference]: With dead ends: 199 [2022-01-31 10:10:31,239 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 10:10:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=458, Invalid=2964, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 10:10:31,241 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 82 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:31,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 368 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 395 Invalid, 0 Unknown, 293 Unchecked, 0.5s Time] [2022-01-31 10:10:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 10:10:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2022-01-31 10:10:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 142 states have (on average 1.119718309859155) internal successors, (159), 143 states have internal predecessors, (159), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 10:10:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2022-01-31 10:10:31,246 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 75 [2022-01-31 10:10:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:31,247 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2022-01-31 10:10:31,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 states have internal predecessors, (54), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:10:31,247 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2022-01-31 10:10:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 10:10:31,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:31,248 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 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] [2022-01-31 10:10:31,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-31 10:10:31,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-31 10:10:31,455 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:31,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:31,456 INFO L85 PathProgramCache]: Analyzing trace with hash 478446275, now seen corresponding path program 10 times [2022-01-31 10:10:31,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:31,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235290978] [2022-01-31 10:10:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:31,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:31,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:31,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446035161] [2022-01-31 10:10:31,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:10:31,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:31,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:31,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:31,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:10:31,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:10:31,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:31,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:10:31,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 92 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 10:10:31,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 84 proven. 29 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-31 10:10:31,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235290978] [2022-01-31 10:10:31,902 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446035161] [2022-01-31 10:10:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446035161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:31,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:31,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:10:31,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299686250] [2022-01-31 10:10:31,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:10:31,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:10:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:10:31,904 INFO L87 Difference]: Start difference. First operand 174 states and 195 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 10:10:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:32,039 INFO L93 Difference]: Finished difference Result 234 states and 262 transitions. [2022-01-31 10:10:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:10:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 78 [2022-01-31 10:10:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:32,042 INFO L225 Difference]: With dead ends: 234 [2022-01-31 10:10:32,042 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 10:10:32,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 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 10:10:32,043 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:32,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 149 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:10:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 10:10:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 183. [2022-01-31 10:10:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 151 states have (on average 1.119205298013245) internal successors, (169), 152 states have internal predecessors, (169), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 10:10:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 205 transitions. [2022-01-31 10:10:32,049 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 205 transitions. Word has length 78 [2022-01-31 10:10:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:32,049 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 205 transitions. [2022-01-31 10:10:32,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 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 10:10:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 205 transitions. [2022-01-31 10:10:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 10:10:32,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:32,050 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 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] [2022-01-31 10:10:32,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-31 10:10:32,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-31 10:10:32,259 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash 481541923, now seen corresponding path program 3 times [2022-01-31 10:10:32,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:32,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92043058] [2022-01-31 10:10:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:32,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:32,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912987161] [2022-01-31 10:10:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:10:32,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:32,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:10:33,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 10:10:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 109 conjunts are in the unsatisfiable core [2022-01-31 10:10:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:33,232 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 10:10:33,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:33,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2022-01-31 10:10:33,247 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 10:10:33,272 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 54 treesize of output 24 [2022-01-31 10:10:33,353 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 74 treesize of output 67 [2022-01-31 10:10:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:33,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 86 [2022-01-31 10:10:33,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,374 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 67 treesize of output 33 [2022-01-31 10:10:33,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,396 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 72 treesize of output 37 [2022-01-31 10:10:33,535 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 98 treesize of output 89 [2022-01-31 10:10:33,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,580 INFO L353 Elim1Store]: treesize reduction 235, result has 34.2 percent of original size [2022-01-31 10:10:33,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 186 [2022-01-31 10:10:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,687 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 110 treesize of output 69 [2022-01-31 10:10:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,752 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 127 treesize of output 72 [2022-01-31 10:10:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:33,871 INFO L353 Elim1Store]: treesize reduction 46, result has 30.3 percent of original size [2022-01-31 10:10:33,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 158 treesize of output 109 [2022-01-31 10:10:34,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,196 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 65 treesize of output 25 [2022-01-31 10:10:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,214 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 48 treesize of output 22 [2022-01-31 10:10:34,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,253 INFO L353 Elim1Store]: treesize reduction 46, result has 25.8 percent of original size [2022-01-31 10:10:34,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 108 [2022-01-31 10:10:34,469 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 189 treesize of output 172 [2022-01-31 10:10:34,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,515 INFO L353 Elim1Store]: treesize reduction 177, result has 25.6 percent of original size [2022-01-31 10:10:34,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 256 [2022-01-31 10:10:34,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,565 INFO L353 Elim1Store]: treesize reduction 89, result has 28.8 percent of original size [2022-01-31 10:10:34,565 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 170 treesize of output 135 [2022-01-31 10:10:34,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:34,654 INFO L353 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2022-01-31 10:10:34,655 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 296 treesize of output 140 [2022-01-31 10:10:36,729 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 110 treesize of output 97 [2022-01-31 10:10:36,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 139 [2022-01-31 10:10:36,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:10:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:36,854 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 111 treesize of output 60 [2022-01-31 10:10:37,915 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 93 treesize of output 82 [2022-01-31 10:10:37,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,935 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 81 treesize of output 120 [2022-01-31 10:10:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:37,994 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 98 treesize of output 49 [2022-01-31 10:10:39,965 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 141 treesize of output 124 [2022-01-31 10:10:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,123 INFO L353 Elim1Store]: treesize reduction 384, result has 9.2 percent of original size [2022-01-31 10:10:40,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 123 treesize of output 155 [2022-01-31 10:10:40,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:40,261 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-31 10:10:40,262 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 109 treesize of output 62 [2022-01-31 10:10:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:42,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:42,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:10:42,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 143 treesize of output 55 [2022-01-31 10:10:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 47 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:10:42,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:47,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92043058] [2022-01-31 10:10:47,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:47,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912987161] [2022-01-31 10:10:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912987161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:10:47,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:10:47,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2022-01-31 10:10:47,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093016285] [2022-01-31 10:10:47,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 10:10:47,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 10:10:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=4580, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 10:10:47,456 INFO L87 Difference]: Start difference. First operand 183 states and 205 transitions. Second operand has 55 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:10:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:48,060 INFO L93 Difference]: Finished difference Result 226 states and 251 transitions. [2022-01-31 10:10:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 10:10:48,060 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 89 [2022-01-31 10:10:48,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:48,061 INFO L225 Difference]: With dead ends: 226 [2022-01-31 10:10:48,061 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 10:10:48,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3011 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=715, Invalid=5137, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 10:10:48,063 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 35 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:48,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 674 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 336 Unchecked, 0.2s Time] [2022-01-31 10:10:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 10:10:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-01-31 10:10:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 168 states have (on average 1.119047619047619) internal successors, (188), 169 states have internal predecessors, (188), 23 states have call successors, (23), 17 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 10:10:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 232 transitions. [2022-01-31 10:10:48,069 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 232 transitions. Word has length 89 [2022-01-31 10:10:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:48,070 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 232 transitions. [2022-01-31 10:10:48,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:10:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 232 transitions. [2022-01-31 10:10:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 10:10:48,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:48,071 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 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] [2022-01-31 10:10:48,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:48,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:48,277 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:48,277 INFO L85 PathProgramCache]: Analyzing trace with hash -433456797, now seen corresponding path program 4 times [2022-01-31 10:10:48,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:48,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218787075] [2022-01-31 10:10:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:48,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:48,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:48,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382553992] [2022-01-31 10:10:48,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:10:48,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:48,291 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:48,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:10:48,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:10:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:48,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 94 conjunts are in the unsatisfiable core [2022-01-31 10:10:48,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:48,615 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 10:10:48,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-01-31 10:10:48,626 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 31 treesize of output 18 [2022-01-31 10:10:48,639 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 52 treesize of output 22 [2022-01-31 10:10:48,706 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 75 [2022-01-31 10:10:48,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:48,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 102 [2022-01-31 10:10:48,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,720 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 69 treesize of output 38 [2022-01-31 10:10:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,750 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 110 treesize of output 48 [2022-01-31 10:10:48,953 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 100 treesize of output 91 [2022-01-31 10:10:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,961 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 90 treesize of output 135 [2022-01-31 10:10:48,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:10:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:48,998 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 119 treesize of output 61 [2022-01-31 10:10:49,079 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 96 treesize of output 87 [2022-01-31 10:10:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,088 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 86 treesize of output 131 [2022-01-31 10:10:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,109 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 110 treesize of output 53 [2022-01-31 10:10:49,921 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 91 treesize of output 80 [2022-01-31 10:10:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,939 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 79 treesize of output 116 [2022-01-31 10:10:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:49,991 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 76 treesize of output 44 [2022-01-31 10:10:50,371 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 121 treesize of output 106 [2022-01-31 10:10:50,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:50,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:50,473 INFO L353 Elim1Store]: treesize reduction 364, result has 25.1 percent of original size [2022-01-31 10:10:50,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 189 [2022-01-31 10:10:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:50,850 INFO L353 Elim1Store]: treesize reduction 200, result has 0.5 percent of original size [2022-01-31 10:10:50,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 137 treesize of output 46 [2022-01-31 10:10:51,264 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 91 treesize of output 80 [2022-01-31 10:10:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,282 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 79 treesize of output 116 [2022-01-31 10:10:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:51,341 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 71 treesize of output 41 [2022-01-31 10:10:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:52,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:10:52,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 49 [2022-01-31 10:10:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 38 proven. 69 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 10:10:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:59,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218787075] [2022-01-31 10:10:59,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382553992] [2022-01-31 10:10:59,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382553992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:10:59,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:10:59,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-01-31 10:10:59,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872775937] [2022-01-31 10:10:59,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:59,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 10:10:59,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 10:10:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2438, Unknown=1, NotChecked=0, Total=2862 [2022-01-31 10:10:59,647 INFO L87 Difference]: Start difference. First operand 207 states and 232 transitions. Second operand has 38 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:11:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:11:01,341 INFO L93 Difference]: Finished difference Result 231 states and 257 transitions. [2022-01-31 10:11:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 10:11:01,341 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 89 [2022-01-31 10:11:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:11:01,344 INFO L225 Difference]: With dead ends: 231 [2022-01-31 10:11:01,344 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 10:11:01,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=556, Invalid=3349, Unknown=1, NotChecked=0, Total=3906 [2022-01-31 10:11:01,345 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:11:01,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 448 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 368 Invalid, 0 Unknown, 253 Unchecked, 0.6s Time] [2022-01-31 10:11:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 10:11:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 189. [2022-01-31 10:11:01,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.1153846153846154) internal successors, (174), 157 states have internal predecessors, (174), 19 states have call successors, (19), 15 states have call predecessors, (19), 13 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 10:11:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 210 transitions. [2022-01-31 10:11:01,354 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 210 transitions. Word has length 89 [2022-01-31 10:11:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:11:01,354 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 210 transitions. [2022-01-31 10:11:01,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:11:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 210 transitions. [2022-01-31 10:11:01,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 10:11:01,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:11:01,355 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 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] [2022-01-31 10:11:01,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:11:01,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:01,578 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:11:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:11:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1614732516, now seen corresponding path program 5 times [2022-01-31 10:11:01,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:11:01,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795821714] [2022-01-31 10:11:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:11:01,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:11:01,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:11:01,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464936484] [2022-01-31 10:11:01,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:11:01,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:11:01,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:11:01,588 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:11:01,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:11:02,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-31 10:11:02,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:11:02,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2022-01-31 10:11:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:11:02,353 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 10:11:02,357 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 10:11:02,362 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 10:11:02,425 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 10:11:02,440 INFO L353 Elim1Store]: treesize reduction 136, result has 18.6 percent of original size [2022-01-31 10:11:02,441 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 10:11:02,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,454 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 10:11:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,487 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 10:11:02,690 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 10:11:02,719 INFO L353 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2022-01-31 10:11:02,720 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 10:11:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,727 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 57 treesize of output 32 [2022-01-31 10:11:02,804 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 67 treesize of output 58 [2022-01-31 10:11:02,837 INFO L353 Elim1Store]: treesize reduction 134, result has 15.7 percent of original size [2022-01-31 10:11:02,837 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 57 treesize of output 79 [2022-01-31 10:11:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:02,857 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 36 treesize of output 19 [2022-01-31 10:11:06,774 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 121 treesize of output 106 [2022-01-31 10:11:06,987 INFO L353 Elim1Store]: treesize reduction 406, result has 23.1 percent of original size [2022-01-31 10:11:06,987 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 13 case distinctions, treesize of input 105 treesize of output 189 [2022-01-31 10:11:07,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:11:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:07,215 INFO L353 Elim1Store]: treesize reduction 101, result has 40.9 percent of original size [2022-01-31 10:11:07,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 144 treesize of output 157 [2022-01-31 10:11:14,256 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 91 treesize of output 80 [2022-01-31 10:11:14,361 INFO L353 Elim1Store]: treesize reduction 324, result has 13.1 percent of original size [2022-01-31 10:11:14,361 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 79 treesize of output 116 [2022-01-31 10:11:14,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:14,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:14,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:14,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:14,432 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 87 treesize of output 42 [2022-01-31 10:11:55,196 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 139 treesize of output 122 [2022-01-31 10:11:56,045 INFO L353 Elim1Store]: treesize reduction 617, result has 22.7 percent of original size [2022-01-31 10:11:56,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 251 [2022-01-31 10:11:56,722 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:11:57,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:57,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:11:57,615 INFO L353 Elim1Store]: treesize reduction 132, result has 43.3 percent of original size [2022-01-31 10:11:57,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 229 [2022-01-31 10:12:37,710 INFO L353 Elim1Store]: treesize reduction 283, result has 1.0 percent of original size [2022-01-31 10:12:37,711 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 108 treesize of output 43 [2022-01-31 10:12:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 62 proven. 75 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 10:12:37,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:12:45,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~column~0_263 Int)) (or (< (+ v_main_~column~0_263 1) c_~ARR_SIZE~0) (not (< v_main_~column~0_263 c_~ARR_SIZE~0)) (let ((.cse8 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse0 (<= .cse8 2147483647)) (.cse2 (+ |c_main_~#array~0.offset| (* v_main_~column~0_263 4))) (.cse4 (select |c_#memory_int| |c_main_~#array~0.base|)) (.cse5 (* c_main_~index2~0 4)) (.cse3 (* .cse8 4)) (.cse6 (div (+ (* (- 1) c_~ARR_SIZE~0) (* c_~ARR_SIZE~0 c_~ARR_SIZE~0)) 2))) (and (or (not .cse0) (<= (let ((.cse1 (store .cse4 (+ .cse5 |c_main_~#array~0.offset| (* c_main_~index1~0 .cse3)) |c_main_#t~ite10|))) (+ (select .cse1 .cse2) (select .cse1 (+ |c_main_~#array~0.offset| .cse3 4)) (select .cse1 |c_main_~#array~0.offset|) (select .cse1 (+ |c_main_~#array~0.offset| .cse3)) c_main_~sum~0)) .cse6)) (or .cse0 (<= (let ((.cse7 (store .cse4 (+ .cse5 (* (+ (- 17179869184) .cse3) c_main_~index1~0) |c_main_~#array~0.offset|) |c_main_#t~ite10|))) (+ (select .cse7 (+ |c_main_~#array~0.offset| .cse3 (- 17179869180))) (select .cse7 |c_main_~#array~0.offset|) (select .cse7 .cse2) c_main_~sum~0 (select .cse7 (+ (- 17179869184) |c_main_~#array~0.offset| .cse3)))) .cse6))))))) is different from false [2022-01-31 10:12:46,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795821714] [2022-01-31 10:12:46,419 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464936484] [2022-01-31 10:12:46,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464936484] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:12:46,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:12:46,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-01-31 10:12:46,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647127009] [2022-01-31 10:12:46,420 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:12:46,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 10:12:46,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:46,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 10:12:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2073, Unknown=20, NotChecked=94, Total=2450 [2022-01-31 10:12:46,421 INFO L87 Difference]: Start difference. First operand 189 states and 210 transitions. Second operand has 37 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 32 states have internal predecessors, (64), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 10:13:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:13:32,911 INFO L93 Difference]: Finished difference Result 198 states and 218 transitions. [2022-01-31 10:13:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 10:13:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 32 states have internal predecessors, (64), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 89 [2022-01-31 10:13:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:13:32,912 INFO L225 Difference]: With dead ends: 198 [2022-01-31 10:13:32,912 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:13:32,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 141.9s TimeCoverageRelationStatistics Valid=445, Invalid=3681, Unknown=38, NotChecked=126, Total=4290 [2022-01-31 10:13:32,913 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:13:32,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 492 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 312 Invalid, 0 Unknown, 421 Unchecked, 0.5s Time] [2022-01-31 10:13:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:13:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-31 10:13:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 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 10:13:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-01-31 10:13:32,916 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 89 [2022-01-31 10:13:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:13:32,916 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-01-31 10:13:32,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 32 states have internal predecessors, (64), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-01-31 10:13:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-01-31 10:13:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 10:13:32,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:13:32,917 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:13:32,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 10:13:33,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-31 10:13:33,124 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:13:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:13:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1111195686, now seen corresponding path program 11 times [2022-01-31 10:13:33,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:13:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998067572] [2022-01-31 10:13:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:13:33,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:13:33,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:13:33,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346464492] [2022-01-31 10:13:33,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:13:33,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:13:33,133 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:13:33,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 10:13:33,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-31 10:13:33,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:13:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 126 conjunts are in the unsatisfiable core [2022-01-31 10:13:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:13:33,783 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 10:13:33,785 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 10:13:33,792 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 10:13:33,851 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 75 [2022-01-31 10:13:33,869 INFO L353 Elim1Store]: treesize reduction 160, result has 19.6 percent of original size [2022-01-31 10:13:33,869 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 74 treesize of output 100 [2022-01-31 10:13:33,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:33,882 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 36 treesize of output 7 [2022-01-31 10:13:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:33,900 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 38 treesize of output 7 [2022-01-31 10:13:33,998 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 96 treesize of output 87 [2022-01-31 10:13:34,037 INFO L353 Elim1Store]: treesize reduction 307, result has 17.0 percent of original size [2022-01-31 10:13:34,037 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 86 treesize of output 127 [2022-01-31 10:13:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,047 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 89 treesize of output 38 [2022-01-31 10:13:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,090 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 94 treesize of output 42 [2022-01-31 10:13:34,330 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 86 treesize of output 75 [2022-01-31 10:13:34,377 INFO L353 Elim1Store]: treesize reduction 284, result has 12.1 percent of original size [2022-01-31 10:13:34,377 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 74 treesize of output 106 [2022-01-31 10:13:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,388 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 17 [2022-01-31 10:13:34,521 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 105 treesize of output 92 [2022-01-31 10:13:34,590 INFO L353 Elim1Store]: treesize reduction 496, result has 12.8 percent of original size [2022-01-31 10:13:34,591 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 91 treesize of output 143 [2022-01-31 10:13:34,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:34,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,656 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 109 treesize of output 54 [2022-01-31 10:13:34,814 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 124 treesize of output 109 [2022-01-31 10:13:34,922 INFO L353 Elim1Store]: treesize reduction 740, result has 12.6 percent of original size [2022-01-31 10:13:34,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 108 treesize of output 180 [2022-01-31 10:13:34,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:34,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 69 [2022-01-31 10:13:35,418 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 139 treesize of output 122 [2022-01-31 10:13:35,550 INFO L353 Elim1Store]: treesize reduction 972, result has 12.0 percent of original size [2022-01-31 10:13:35,550 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 121 treesize of output 209 [2022-01-31 10:13:35,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:35,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 63 [2022-01-31 10:13:35,799 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 154 treesize of output 135 [2022-01-31 10:13:35,976 INFO L353 Elim1Store]: treesize reduction 1228, result has 11.5 percent of original size [2022-01-31 10:13:35,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 134 treesize of output 238 [2022-01-31 10:13:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 86 [2022-01-31 10:13:36,250 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 144 treesize of output 123 [2022-01-31 10:13:36,531 INFO L353 Elim1Store]: treesize reduction 1153, result has 11.9 percent of original size [2022-01-31 10:13:36,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 44 case distinctions, treesize of input 122 treesize of output 227 [2022-01-31 10:13:36,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:36,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 70 [2022-01-31 10:14:42,429 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 168 treesize of output 145 [2022-01-31 10:14:44,023 INFO L353 Elim1Store]: treesize reduction 1532, result has 13.3 percent of original size [2022-01-31 10:14:44,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 54 case distinctions, treesize of input 144 treesize of output 320 [2022-01-31 10:14:44,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:14:44,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:14:44,944 INFO L353 Elim1Store]: treesize reduction 1782, result has 0.1 percent of original size [2022-01-31 10:14:44,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 578 treesize of output 413 [2022-01-31 10:15:43,538 INFO L353 Elim1Store]: treesize reduction 1987, result has 0.9 percent of original size [2022-01-31 10:15:43,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 436 treesize of output 163 [2022-01-31 10:15:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 222 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:15:44,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:16:17,737 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~column~0_295 Int)) (or (not (< (+ v_main_~column~0_295 1) c_~ARR_SIZE~0)) (let ((.cse11 (* v_main_~column~0_295 4)) (.cse10 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse0 (<= .cse10 2147483647)) (.cse4 (+ |c_main_~#array~0.offset| 4 .cse11)) (.cse2 (+ |c_main_~#array~0.offset| .cse11)) (.cse5 (* .cse10 8)) (.cse6 (select |c_#memory_int| |c_main_~#array~0.base|)) (.cse7 (* c_main_~index2~0 4)) (.cse3 (* .cse10 4)) (.cse8 (div (+ (* (- 1) c_~ARR_SIZE~0) (* c_~ARR_SIZE~0 c_~ARR_SIZE~0)) 2))) (and (or (not .cse0) (<= (let ((.cse1 (store .cse6 (+ .cse7 |c_main_~#array~0.offset| (* c_main_~index1~0 .cse3)) |c_main_#t~ite10|))) (+ (select .cse1 .cse2) (select .cse1 (+ |c_main_~#array~0.offset| 8 .cse3)) (select .cse1 .cse4) (select .cse1 (+ |c_main_~#array~0.offset| .cse5 4)) (select .cse1 (+ |c_main_~#array~0.offset| .cse3 4)) (select .cse1 |c_main_~#array~0.offset|) (select .cse1 (+ |c_main_~#array~0.offset| .cse5)) (select .cse1 (+ |c_main_~#array~0.offset| .cse5 8)) (select .cse1 (+ |c_main_~#array~0.offset| .cse3)) c_main_~sum~0)) .cse8)) (or .cse0 (<= (let ((.cse9 (store .cse6 (+ .cse7 (* (+ (- 17179869184) .cse3) c_main_~index1~0) |c_main_~#array~0.offset|) |c_main_#t~ite10|))) (+ (select .cse9 (+ |c_main_~#array~0.offset| .cse3 (- 17179869176))) (select .cse9 .cse4) (select .cse9 (+ |c_main_~#array~0.offset| .cse3 (- 17179869180))) (select .cse9 (+ |c_main_~#array~0.offset| .cse5 (- 34359738368))) (select .cse9 .cse2) (select .cse9 |c_main_~#array~0.offset|) (select .cse9 (+ |c_main_~#array~0.offset| (- 34359738364) .cse5)) (select .cse9 (+ (- 34359738360) |c_main_~#array~0.offset| .cse5)) c_main_~sum~0 (select .cse9 (+ (- 17179869184) |c_main_~#array~0.offset| .cse3)))) .cse8))))) (< (+ v_main_~column~0_295 2) c_~ARR_SIZE~0))) is different from false [2022-01-31 10:16:49,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:16:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998067572] [2022-01-31 10:16:49,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:16:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346464492] [2022-01-31 10:16:49,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346464492] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:16:49,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:16:49,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2022-01-31 10:16:49,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270017321] [2022-01-31 10:16:49,268 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:16:49,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 10:16:49,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:16:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 10:16:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5758, Unknown=39, NotChecked=156, Total=6480 [2022-01-31 10:16:49,270 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 55 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 51 states have internal predecessors, (74), 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 10:17:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:17:07,492 INFO L93 Difference]: Finished difference Result 157 states and 177 transitions. [2022-01-31 10:17:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 10:17:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 51 states have internal predecessors, (74), 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 87 [2022-01-31 10:17:07,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:17:07,494 INFO L225 Difference]: With dead ends: 157 [2022-01-31 10:17:07,494 INFO L226 Difference]: Without dead ends: 154 [2022-01-31 10:17:07,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2880 ImplicationChecksByTransitivity, 186.6s TimeCoverageRelationStatistics Valid=607, Invalid=6835, Unknown=44, NotChecked=170, Total=7656 [2022-01-31 10:17:07,495 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 604 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:17:07,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 680 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 706 Invalid, 0 Unknown, 604 Unchecked, 2.2s Time] [2022-01-31 10:17:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-31 10:17:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2022-01-31 10:17:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 130 states have internal predecessors, (148), 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 10:17:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 162 transitions. [2022-01-31 10:17:07,499 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 162 transitions. Word has length 87 [2022-01-31 10:17:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:17:07,499 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 162 transitions. [2022-01-31 10:17:07,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 51 states have internal predecessors, (74), 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 10:17:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 162 transitions. [2022-01-31 10:17:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 10:17:07,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:17:07,500 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:17:07,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-31 10:17:07,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-31 10:17:07,711 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:17:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:17:07,712 INFO L85 PathProgramCache]: Analyzing trace with hash 839104569, now seen corresponding path program 7 times [2022-01-31 10:17:07,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:17:07,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588416551] [2022-01-31 10:17:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:17:07,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:17:07,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:17:07,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882726003] [2022-01-31 10:17:07,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:17:07,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:17:07,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:17:07,721 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:17:07,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 10:17:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:17:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 110 conjunts are in the unsatisfiable core [2022-01-31 10:17:08,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:17:08,419 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 10:17:08,423 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 10:17:08,430 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 10:17:08,493 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 76 treesize of output 69 [2022-01-31 10:17:08,514 INFO L353 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2022-01-31 10:17:08,514 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 10:17:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:08,524 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 30 treesize of output 7 [2022-01-31 10:17:08,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:08,648 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 94 treesize of output 85 [2022-01-31 10:17:08,687 INFO L353 Elim1Store]: treesize reduction 293, result has 16.8 percent of original size [2022-01-31 10:17:08,688 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 84 treesize of output 123 [2022-01-31 10:17:08,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:08,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:08,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:08,726 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 79 treesize of output 28 [2022-01-31 10:17:08,965 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 116 treesize of output 105 [2022-01-31 10:17:09,022 INFO L353 Elim1Store]: treesize reduction 524, result has 15.9 percent of original size [2022-01-31 10:17:09,022 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 104 treesize of output 166 [2022-01-31 10:17:09,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,076 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 117 treesize of output 47 [2022-01-31 10:17:09,210 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 131 treesize of output 118 [2022-01-31 10:17:09,300 INFO L353 Elim1Store]: treesize reduction 730, result has 14.6 percent of original size [2022-01-31 10:17:09,300 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 117 treesize of output 195 [2022-01-31 10:17:09,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,370 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 150 treesize of output 63 [2022-01-31 10:17:09,518 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 143 treesize of output 128 [2022-01-31 10:17:09,627 INFO L353 Elim1Store]: treesize reduction 930, result has 14.1 percent of original size [2022-01-31 10:17:09,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 127 treesize of output 222 [2022-01-31 10:17:09,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:09,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:09,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 102 [2022-01-31 10:17:10,036 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 152 [2022-01-31 10:17:10,179 INFO L353 Elim1Store]: treesize reduction 1302, result has 12.9 percent of original size [2022-01-31 10:17:10,180 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 151 treesize of output 269 [2022-01-31 10:17:10,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 283 treesize of output 127 [2022-01-31 10:17:10,500 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 184 treesize of output 165 [2022-01-31 10:17:10,684 INFO L353 Elim1Store]: treesize reduction 1588, result has 12.1 percent of original size [2022-01-31 10:17:10,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 164 treesize of output 298 [2022-01-31 10:17:10,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:10,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 260 treesize of output 122 [2022-01-31 10:17:11,002 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 144 treesize of output 123 [2022-01-31 10:17:11,239 INFO L353 Elim1Store]: treesize reduction 1153, result has 11.9 percent of original size [2022-01-31 10:17:11,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 44 case distinctions, treesize of input 122 treesize of output 227 [2022-01-31 10:17:11,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:17:11,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:17:11,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 86 [2022-01-31 10:18:09,418 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 198 treesize of output 171 [2022-01-31 10:18:10,134 INFO L353 Elim1Store]: treesize reduction 1688, result has 18.5 percent of original size [2022-01-31 10:18:10,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 64 case distinctions, treesize of input 170 treesize of output 468 [2022-01-31 10:18:14,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:14,233 INFO L353 Elim1Store]: treesize reduction 662, result has 0.2 percent of original size [2022-01-31 10:18:14,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 217 treesize of output 83 [2022-01-31 10:18:18,416 INFO L353 Elim1Store]: treesize reduction 819, result has 0.1 percent of original size [2022-01-31 10:18:18,416 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 154 treesize of output 52 [2022-01-31 10:18:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 222 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:18:18,598 INFO L328 TraceCheckSpWp]: Computing backward predicates...