/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/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:16:17,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:16:17,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:16:17,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 16:16:17,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 16:16:17,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 16:16:17,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 16:16:17,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 16:16:17,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 16:16:17,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 16:16:17,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 16:16:17,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 16:16:17,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:16:17,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:16:17,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:16:17,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:16:17,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:16:17,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:16:17,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:16:17,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:16:17,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:16:17,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:16:17,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:16:17,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:16:17,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:16:17,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:16:17,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:16:17,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:16:17,310 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:16:17,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:16:17,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:16:17,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:16:17,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:16:17,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:16:17,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:16:17,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:16:17,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:16:17,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:16:17,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:16:17,323 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:16:17,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:16:17,324 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:16:17,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:16:17,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:16:17,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:16:17,324 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:16:17,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:16:17,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:16:17,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:16:17,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:16:17,326 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:16:17,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:16:17,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:16:17,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:16:17,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:16:17,562 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:16:17,567 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:16:17,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-02-23 16:16:17,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a87c8223/b67367acc37f4e528e0f79407f424feb/FLAG0c3e93be6 [2022-02-23 16:16:18,060 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:16:18,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-02-23 16:16:18,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a87c8223/b67367acc37f4e528e0f79407f424feb/FLAG0c3e93be6 [2022-02-23 16:16:18,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a87c8223/b67367acc37f4e528e0f79407f424feb [2022-02-23 16:16:18,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:16:18,601 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:16:18,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:16:18,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:16:18,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:16:18,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:16:18" (1/1) ... [2022-02-23 16:16:18,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77451461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:18, skipping insertion in model container [2022-02-23 16:16:18,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:16:18" (1/1) ... [2022-02-23 16:16:18,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:16:18,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:16:18,893 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-02-23 16:16:18,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:16:18,912 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:16:18,982 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-02-23 16:16:18,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:16:19,007 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:16:19,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19 WrapperNode [2022-02-23 16:16:19,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:16:19,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:16:19,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:16:19,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:16:19,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:16:19,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:16:19,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:16:19,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:16:19,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:16:19,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:16:19,108 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) [2022-02-23 16:16:19,133 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 [2022-02-23 16:16:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:16:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:16:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:16:19,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:16:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:16:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:16:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:16:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:16:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-02-23 16:16:19,148 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-02-23 16:16:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:16:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:16:19,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-23 16:16:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:16:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-02-23 16:16:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:16:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:16:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:16:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:16:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-02-23 16:16:19,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:16:19,309 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:16:19,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:16:19,925 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:16:19,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:16:19,930 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-23 16:16:19,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:16:19 BoogieIcfgContainer [2022-02-23 16:16:19,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:16:19,932 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:16:19,933 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:16:19,934 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:16:19,936 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:16:19" (1/1) ... [2022-02-23 16:16:19,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:16:19 BasicIcfg [2022-02-23 16:16:19,973 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:16:19,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:16:19,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:16:19,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:16:19,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:16:18" (1/4) ... [2022-02-23 16:16:19,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f68d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:16:19, skipping insertion in model container [2022-02-23 16:16:19,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:16:19" (2/4) ... [2022-02-23 16:16:19,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f68d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:16:19, skipping insertion in model container [2022-02-23 16:16:19,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:16:19" (3/4) ... [2022-02-23 16:16:19,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f68d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:16:19, skipping insertion in model container [2022-02-23 16:16:19,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:16:19" (4/4) ... [2022-02-23 16:16:19,983 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.cJordan [2022-02-23 16:16:19,987 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:16:19,987 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:16:20,023 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:16:20,030 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 [2022-02-23 16:16:20,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:16:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 16:16:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-23 16:16:20,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:16:20,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:16:20,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:16:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:16:20,066 INFO L85 PathProgramCache]: Analyzing trace with hash 542394869, now seen corresponding path program 1 times [2022-02-23 16:16:20,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:16:20,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441704653] [2022-02-23 16:16:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:16:20,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:16:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:21,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:16:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:21,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:16:21,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441704653] [2022-02-23 16:16:21,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441704653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:16:21,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:16:21,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-23 16:16:21,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299066563] [2022-02-23 16:16:21,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:16:21,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:16:21,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:16:21,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:16:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:16:21,069 INFO L87 Difference]: Start difference. First operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:16:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:16:21,815 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-02-23 16:16:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 16:16:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-23 16:16:21,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:16:21,826 INFO L225 Difference]: With dead ends: 85 [2022-02-23 16:16:21,826 INFO L226 Difference]: Without dead ends: 57 [2022-02-23 16:16:21,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-23 16:16:21,830 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 120 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:16:21,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 717 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 16:16:21,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-23 16:16:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-02-23 16:16:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:16:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-02-23 16:16:21,869 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2022-02-23 16:16:21,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:16:21,870 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-02-23 16:16:21,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:16:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-02-23 16:16:21,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-23 16:16:21,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:16:21,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:16:21,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:16:21,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:16:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:16:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1761345441, now seen corresponding path program 1 times [2022-02-23 16:16:21,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:16:21,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169624445] [2022-02-23 16:16:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:16:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:16:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:22,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:16:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:22,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:16:22,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169624445] [2022-02-23 16:16:22,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169624445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:16:22,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572655522] [2022-02-23 16:16:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:16:22,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:16:22,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:16:22,307 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) [2022-02-23 16:16:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:16:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 16:16:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:16:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:22,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:16:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:23,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572655522] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:16:23,507 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:16:23,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-02-23 16:16:23,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285583611] [2022-02-23 16:16:23,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:16:23,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-23 16:16:23,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:16:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-23 16:16:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-02-23 16:16:23,510 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:16:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:16:29,191 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-02-23 16:16:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 16:16:29,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-23 16:16:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:16:29,193 INFO L225 Difference]: With dead ends: 116 [2022-02-23 16:16:29,193 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 16:16:29,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=690, Invalid=2066, Unknown=0, NotChecked=0, Total=2756 [2022-02-23 16:16:29,196 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 550 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 16:16:29,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 304 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 16:16:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 16:16:29,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-02-23 16:16:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:16:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-02-23 16:16:29,205 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 53 [2022-02-23 16:16:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:16:29,205 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-02-23 16:16:29,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:16:29,206 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-02-23 16:16:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-23 16:16:29,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:16:29,208 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:16:29,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:16:29,427 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 [2022-02-23 16:16:29,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:16:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:16:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -778767649, now seen corresponding path program 2 times [2022-02-23 16:16:29,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:16:29,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295555518] [2022-02-23 16:16:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:16:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:16:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:16:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:16:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:30,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:16:30,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295555518] [2022-02-23 16:16:30,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295555518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:16:30,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471854949] [2022-02-23 16:16:30,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:16:30,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:16:30,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:16:30,288 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) [2022-02-23 16:16:30,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:16:30,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:16:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:16:30,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 16:16:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:16:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:31,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:16:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:16:32,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471854949] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:16:32,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:16:32,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 56 [2022-02-23 16:16:32,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936622180] [2022-02-23 16:16:32,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:16:32,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-23 16:16:32,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:16:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-23 16:16:32,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 16:16:32,467 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:17:26,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:17:26,778 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-02-23 16:17:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-23 16:17:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-23 16:17:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:17:26,781 INFO L225 Difference]: With dead ends: 216 [2022-02-23 16:17:26,781 INFO L226 Difference]: Without dead ends: 216 [2022-02-23 16:17:26,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=2215, Invalid=7097, Unknown=0, NotChecked=0, Total=9312 [2022-02-23 16:17:26,785 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1152 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:17:26,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 825 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-23 16:17:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-23 16:17:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-02-23 16:17:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:17:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2022-02-23 16:17:26,798 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 113 [2022-02-23 16:17:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:17:26,798 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2022-02-23 16:17:26,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-23 16:17:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2022-02-23 16:17:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-23 16:17:26,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:17:26,801 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:17:26,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 16:17:27,020 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 [2022-02-23 16:17:27,021 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:17:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:17:27,021 INFO L85 PathProgramCache]: Analyzing trace with hash 940366943, now seen corresponding path program 3 times [2022-02-23 16:17:27,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:17:27,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963507090] [2022-02-23 16:17:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:17:27,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:17:27,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:17:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:17:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:17:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 99 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:17:29,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:17:29,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963507090] [2022-02-23 16:17:29,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963507090] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:17:29,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565314863] [2022-02-23 16:17:29,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 16:17:29,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:17:29,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:17:29,940 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) [2022-02-23 16:17:29,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 16:17:30,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 16:17:30,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:17:30,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 16:17:30,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:17:31,229 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-23 16:17:31,229 INFO L390 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 23 treesize of output 23