/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/array1_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:12:25,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:12:25,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:12:26,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:12:26,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:12:26,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:12:26,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:12:26,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:12:26,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:12:26,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:12:26,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:12:26,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:12:26,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:12:26,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:12:26,084 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:12:26,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:12:26,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:12:26,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:12:26,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:12:26,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:12:26,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:12:26,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:12:26,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:12:26,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:12:26,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:12:26,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:12:26,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:12:26,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:12:26,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:12:26,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:12:26,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:12:26,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:12:26,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:12:26,130 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:12:26,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:12:26,131 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:12:26,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:12:26,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:12:26,131 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:12:26,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:12:26,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:12:26,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:12:26,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:12:26,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:12:26,137 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:12:26,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:12:26,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:12:26,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:12:26,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:12:26,416 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:12:26,417 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:12:26,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array1_pattern.c [2022-01-31 10:12:26,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c50691c/3d863f2ca8ad437e914f0c2482ccb911/FLAG584b32149 [2022-01-31 10:12:26,855 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:12:26,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array1_pattern.c [2022-01-31 10:12:26,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c50691c/3d863f2ca8ad437e914f0c2482ccb911/FLAG584b32149 [2022-01-31 10:12:26,872 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0c50691c/3d863f2ca8ad437e914f0c2482ccb911 [2022-01-31 10:12:26,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:12:26,876 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:12:26,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:12:26,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:12:26,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:12:26,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:12:26" (1/1) ... [2022-01-31 10:12:26,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4739cab3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:26, skipping insertion in model container [2022-01-31 10:12:26,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:12:26" (1/1) ... [2022-01-31 10:12:26,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:12:26,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:12:27,044 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/array1_pattern.c[1307,1320] [2022-01-31 10:12:27,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:12:27,072 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:12:27,088 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/array1_pattern.c[1307,1320] [2022-01-31 10:12:27,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:12:27,125 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:12:27,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27 WrapperNode [2022-01-31 10:12:27,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:12:27,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:12:27,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:12:27,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:12:27,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:12:27,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:12:27,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:12:27,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:12:27,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:12:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:27,197 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 10:12:27,218 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 10:12:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:12:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:12:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:12:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:12:27,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:12:27,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:12:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:12:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:12:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:12:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:12:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:12:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:12:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:12:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:12:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:12:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:12:27,331 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:12:27,333 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:12:27,545 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:12:27,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:12:27,550 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 10:12:27,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:12:27 BoogieIcfgContainer [2022-01-31 10:12:27,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:12:27,552 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:12:27,552 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:12:27,561 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:12:27,564 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:12:27" (1/1) ... [2022-01-31 10:12:27,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:12:27 BasicIcfg [2022-01-31 10:12:27,587 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:12:27,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:12:27,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:12:27,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:12:27,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:12:26" (1/4) ... [2022-01-31 10:12:27,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d6de45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:12:27, skipping insertion in model container [2022-01-31 10:12:27,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:12:27" (2/4) ... [2022-01-31 10:12:27,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d6de45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:12:27, skipping insertion in model container [2022-01-31 10:12:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:12:27" (3/4) ... [2022-01-31 10:12:27,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d6de45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:12:27, skipping insertion in model container [2022-01-31 10:12:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:12:27" (4/4) ... [2022-01-31 10:12:27,605 INFO L111 eAbstractionObserver]: Analyzing ICFG array1_pattern.cJordan [2022-01-31 10:12:27,609 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:12:27,610 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:12:27,645 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:12:27,651 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 10:12:27,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:12:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:12:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:12:27,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:27,668 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 10:12:27,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1504316797, now seen corresponding path program 1 times [2022-01-31 10:12:27,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:27,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679428227] [2022-01-31 10:12:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:27,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:12:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:27,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:12:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:27,841 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 10:12:27,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:27,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679428227] [2022-01-31 10:12:27,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679428227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:12:27,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:12:27,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:12:27,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066289591] [2022-01-31 10:12:27,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:12:27,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:12:27,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:12:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:12:27,879 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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 10:12:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:27,936 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-01-31 10:12:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:12:27,938 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 10:12:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:27,944 INFO L225 Difference]: With dead ends: 33 [2022-01-31 10:12:27,944 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 10:12:27,945 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 10:12:27,948 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:27,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:12:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 10:12:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 10:12:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:27,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-31 10:12:27,979 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2022-01-31 10:12:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-31 10:12:27,980 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 10:12:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-31 10:12:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 10:12:27,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:27,982 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:12:27,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:12:27,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash -879387650, now seen corresponding path program 1 times [2022-01-31 10:12:27,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:27,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309561130] [2022-01-31 10:12:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:27,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:28,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:28,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861108631] [2022-01-31 10:12:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:28,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:28,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:28,015 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 10:12:28,040 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 10:12:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:28,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 10:12:28,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:12:28,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:12:28,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309561130] [2022-01-31 10:12:28,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:28,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861108631] [2022-01-31 10:12:28,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861108631] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:12:28,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:12:28,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:12:28,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795440070] [2022-01-31 10:12:28,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:12:28,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:12:28,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:28,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:12:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:12:28,298 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:12:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:28,322 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 10:12:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:12:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-01-31 10:12:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:28,326 INFO L225 Difference]: With dead ends: 30 [2022-01-31 10:12:28,329 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 10:12:28,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:12:28,334 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:28,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:12:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 10:12:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 10:12:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 10:12:28,341 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 27 [2022-01-31 10:12:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:28,343 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 10:12:28,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:12:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 10:12:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 10:12:28,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:28,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:12:28,365 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 10:12:28,545 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 10:12:28,545 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1925561755, now seen corresponding path program 1 times [2022-01-31 10:12:28,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:28,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851549279] [2022-01-31 10:12:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:28,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:28,574 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:28,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599059293] [2022-01-31 10:12:28,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:28,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:28,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:28,578 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 10:12:28,600 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 10:12:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:12:28,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:12:28,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:12:28,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:28,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851549279] [2022-01-31 10:12:28,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:28,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599059293] [2022-01-31 10:12:28,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599059293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:12:28,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:12:28,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:12:28,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668597641] [2022-01-31 10:12:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:12:28,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:12:28,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:12:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:12:28,764 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:12:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:28,829 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-31 10:12:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:12:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-31 10:12:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:28,833 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:12:28,833 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 10:12:28,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:12:28,837 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 12 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:28,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:12:28,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 10:12:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-01-31 10:12:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 10:12:28,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 29 [2022-01-31 10:12:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:28,852 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 10:12:28,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:12:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 10:12:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 10:12:28,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:28,854 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:12:28,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 10:12:29,067 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 10:12:29,068 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:29,068 INFO L85 PathProgramCache]: Analyzing trace with hash -74774123, now seen corresponding path program 1 times [2022-01-31 10:12:29,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:29,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422338728] [2022-01-31 10:12:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:29,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:29,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851724519] [2022-01-31 10:12:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:29,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:29,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:29,105 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 10:12:29,107 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 10:12:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 10:12:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:29,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:12:29,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:29,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 87 [2022-01-31 10:12:29,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 84 [2022-01-31 10:12:29,563 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 67 treesize of output 72 [2022-01-31 10:12:29,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:12:29,620 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:29,633 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 19 treesize of output 5 [2022-01-31 10:12:29,929 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-01-31 10:12:29,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 50 treesize of output 25 [2022-01-31 10:12:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:12:30,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:12:30,168 INFO L353 Elim1Store]: treesize reduction 21, result has 63.8 percent of original size [2022-01-31 10:12:30,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 178 [2022-01-31 10:12:30,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:30,189 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 126 treesize of output 133 [2022-01-31 10:12:30,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:30,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 62 [2022-01-31 10:12:30,432 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 20 treesize of output 6 [2022-01-31 10:12:30,453 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 20 treesize of output 6 [2022-01-31 10:12:30,550 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 19 treesize of output 6 [2022-01-31 10:12:30,577 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 19 treesize of output 6 [2022-01-31 10:12:30,666 INFO L353 Elim1Store]: treesize reduction 21, result has 56.3 percent of original size [2022-01-31 10:12:30,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 65 treesize of output 78 [2022-01-31 10:12:30,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-31 10:12:30,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:30,727 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 20 treesize of output 12 [2022-01-31 10:12:31,000 INFO L353 Elim1Store]: treesize reduction 63, result has 61.6 percent of original size [2022-01-31 10:12:31,000 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 4 case distinctions, treesize of input 157 treesize of output 218 [2022-01-31 10:12:31,131 INFO L353 Elim1Store]: treesize reduction 5, result has 79.2 percent of original size [2022-01-31 10:12:31,132 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 37 treesize of output 36 [2022-01-31 10:12:31,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:31,194 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 37 treesize of output 41 [2022-01-31 10:12:31,297 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 20 treesize of output 6 [2022-01-31 10:12:31,437 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-31 10:12:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:31,493 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 34 treesize of output 14 [2022-01-31 10:12:31,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:31,521 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 34 treesize of output 14 [2022-01-31 10:12:32,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:32,174 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 123 treesize of output 121 [2022-01-31 10:12:32,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:32,243 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 60 treesize of output 41 [2022-01-31 10:12:32,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:32,432 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 60 treesize of output 64 [2022-01-31 10:12:33,339 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 19 treesize of output 6 [2022-01-31 10:12:33,687 INFO L353 Elim1Store]: treesize reduction 52, result has 55.9 percent of original size [2022-01-31 10:12:33,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 185 [2022-01-31 10:12:38,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422338728] [2022-01-31 10:12:38,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:38,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851724519] [2022-01-31 10:12:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851724519] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:12:38,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:12:38,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-01-31 10:12:38,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119492854] [2022-01-31 10:12:38,906 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:12:38,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:12:38,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:12:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=309, Unknown=2, NotChecked=0, Total=380 [2022-01-31 10:12:38,908 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:12:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:39,344 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-01-31 10:12:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:12:39,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-01-31 10:12:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:39,347 INFO L225 Difference]: With dead ends: 53 [2022-01-31 10:12:39,347 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 10:12:39,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=169, Invalid=641, Unknown=2, NotChecked=0, Total=812 [2022-01-31 10:12:39,348 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:39,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 211 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-01-31 10:12:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 10:12:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-01-31 10:12:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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 10:12:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-01-31 10:12:39,354 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2022-01-31 10:12:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:39,354 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-01-31 10:12:39,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 10:12:39,354 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-01-31 10:12:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:12:39,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:39,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:12:39,373 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 10:12:39,559 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 10:12:39,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2065047922, now seen corresponding path program 2 times [2022-01-31 10:12:39,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:39,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181906488] [2022-01-31 10:12:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:39,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:39,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:39,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864448353] [2022-01-31 10:12:39,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:12:39,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:39,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:39,598 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 10:12:39,599 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 10:12:39,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:12:39,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:12:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:12:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:12:39,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:12:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:12:39,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181906488] [2022-01-31 10:12:39,878 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864448353] [2022-01-31 10:12:39,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864448353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:12:39,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:12:39,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:12:39,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354816976] [2022-01-31 10:12:39,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:12:39,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:12:39,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:12:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:12:39,880 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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 10:12:40,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:40,009 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-01-31 10:12:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:12:40,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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 33 [2022-01-31 10:12:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:40,010 INFO L225 Difference]: With dead ends: 51 [2022-01-31 10:12:40,010 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 10:12:40,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:12:40,011 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:40,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 98 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:12:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 10:12:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-01-31 10:12:40,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:40,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 10:12:40,015 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 33 [2022-01-31 10:12:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:40,015 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 10:12:40,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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 10:12:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 10:12:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 10:12:40,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:40,016 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:12:40,043 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 10:12:40,227 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 10:12:40,227 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1747795727, now seen corresponding path program 3 times [2022-01-31 10:12:40,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:40,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806258648] [2022-01-31 10:12:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:40,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:40,251 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111423869] [2022-01-31 10:12:40,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:12:40,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:40,253 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 10:12:40,257 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 10:12:40,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 10:12:40,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:12:40,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 10:12:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:40,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:12:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:40,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 87 [2022-01-31 10:12:40,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 84 [2022-01-31 10:12:40,569 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 67 treesize of output 72 [2022-01-31 10:12:40,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:12:40,587 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 19 treesize of output 5 [2022-01-31 10:12:40,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:40,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 53 treesize of output 53 [2022-01-31 10:12:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 10:12:41,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:12:41,269 INFO L353 Elim1Store]: treesize reduction 21, result has 63.8 percent of original size [2022-01-31 10:12:41,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 178 [2022-01-31 10:12:41,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:41,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:41,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 133 [2022-01-31 10:12:41,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:41,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 62 [2022-01-31 10:12:41,566 INFO L353 Elim1Store]: treesize reduction 21, result has 56.3 percent of original size [2022-01-31 10:12:41,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 65 treesize of output 78 [2022-01-31 10:12:41,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:41,598 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 27 treesize of output 31 [2022-01-31 10:12:41,765 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 20 treesize of output 6 [2022-01-31 10:12:41,827 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 20 treesize of output 6 [2022-01-31 10:12:41,920 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 19 treesize of output 6 [2022-01-31 10:12:42,073 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 19 treesize of output 6 [2022-01-31 10:12:42,365 INFO L353 Elim1Store]: treesize reduction 63, result has 61.6 percent of original size [2022-01-31 10:12:42,365 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 4 case distinctions, treesize of input 157 treesize of output 218 [2022-01-31 10:12:42,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:42,545 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 33 treesize of output 14 [2022-01-31 10:12:42,717 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 19 treesize of output 6 [2022-01-31 10:12:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:42,797 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 17 [2022-01-31 10:12:43,171 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:43,171 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 159 treesize of output 157 [2022-01-31 10:12:44,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:44,149 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 55 treesize of output 59 [2022-01-31 10:12:44,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:44,221 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 220 treesize of output 218 [2022-01-31 10:12:44,547 INFO L353 Elim1Store]: treesize reduction 52, result has 55.9 percent of original size [2022-01-31 10:12:44,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 140 [2022-01-31 10:12:45,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806258648] [2022-01-31 10:12:45,135 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111423869] [2022-01-31 10:12:45,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111423869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:12:45,135 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:12:45,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-01-31 10:12:45,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180839280] [2022-01-31 10:12:45,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:12:45,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 10:12:45,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 10:12:45,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-01-31 10:12:45,137 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:45,427 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-31 10:12:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:12:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-01-31 10:12:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:45,428 INFO L225 Difference]: With dead ends: 37 [2022-01-31 10:12:45,429 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 10:12:45,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:12:45,430 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:45,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-31 10:12:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 10:12:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 10:12:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 10:12:45,440 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 33 [2022-01-31 10:12:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:45,441 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 10:12:45,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:12:45,441 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 10:12:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 10:12:45,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:45,442 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:12:45,462 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 10:12:45,655 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 10:12:45,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1208017004, now seen corresponding path program 4 times [2022-01-31 10:12:45,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:45,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488653542] [2022-01-31 10:12:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:45,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:45,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:45,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334775358] [2022-01-31 10:12:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:12:45,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:45,692 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 10:12:45,693 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 10:12:45,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:12:45,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:12:45,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 10:12:45,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:45,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 10:12:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:45,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2022-01-31 10:12:45,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-31 10:12:45,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-01-31 10:12:45,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:45,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2022-01-31 10:12:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,657 INFO L353 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2022-01-31 10:12:46,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 135 [2022-01-31 10:12:46,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 113 [2022-01-31 10:12:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,710 INFO L353 Elim1Store]: treesize reduction 69, result has 27.4 percent of original size [2022-01-31 10:12:46,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 115 [2022-01-31 10:12:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:46,807 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 107 treesize of output 83 [2022-01-31 10:12:49,187 INFO L353 Elim1Store]: treesize reduction 31, result has 43.6 percent of original size [2022-01-31 10:12:49,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 82 [2022-01-31 10:12:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:12:49,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:14:12,832 WARN L228 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 28 DAG size of output: 25 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-31 10:14:12,833 INFO L353 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2022-01-31 10:14:12,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 7111 treesize of output 4648 [2022-01-31 10:14:13,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:14:13,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20120 treesize of output 19788 [2022-01-31 10:14:24,979 WARN L228 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 34 DAG size of output: 26 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-31 10:14:24,980 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-31 10:14:25,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 208649002139 treesize of output 206250566703