/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-tiling/nr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:53:01,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:53:01,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:53:01,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:53:01,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:53:01,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:53:01,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:53:01,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:53:01,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:53:01,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:53:01,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:53:01,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:53:01,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:53:01,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:53:01,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:53:01,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:53:01,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:53:01,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:53:01,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:53:01,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:53:01,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:53:01,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:53:01,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:53:01,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:53:01,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:53:01,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:53:01,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:53:01,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:53:01,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:53:01,215 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:53:01,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:53:01,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:53:01,216 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:53:01,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:53:01,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:53:01,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:53:01,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:53:01,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:53:01,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:53:01,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:53:01,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:53:01,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:53:01,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:53:01,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:53:01,219 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:53:01,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:53:01,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:53:01,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:53:01,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:53:01,468 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:53:01,472 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:53:01,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr5.c [2022-01-31 08:53:01,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6289b6ed3/8672d9c8b89d4b5a8686445ed6d4fcc3/FLAG7f82f4c6c [2022-01-31 08:53:01,881 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:53:01,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr5.c [2022-01-31 08:53:01,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6289b6ed3/8672d9c8b89d4b5a8686445ed6d4fcc3/FLAG7f82f4c6c [2022-01-31 08:53:01,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6289b6ed3/8672d9c8b89d4b5a8686445ed6d4fcc3 [2022-01-31 08:53:01,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:53:01,903 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:53:01,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:53:01,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:53:01,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:53:01,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:01" (1/1) ... [2022-01-31 08:53:01,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253cea07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:01, skipping insertion in model container [2022-01-31 08:53:01,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:53:01" (1/1) ... [2022-01-31 08:53:01,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:53:01,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:53:02,042 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-tiling/nr5.c[394,407] [2022-01-31 08:53:02,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:53:02,056 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:53:02,064 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-tiling/nr5.c[394,407] [2022-01-31 08:53:02,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:53:02,077 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:53:02,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02 WrapperNode [2022-01-31 08:53:02,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:53:02,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:53:02,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:53:02,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:53:02,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:53:02,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:53:02,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:53:02,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:53:02,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:53:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:02,125 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 08:53:02,127 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 08:53:02,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:53:02,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:53:02,150 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:53:02,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 08:53:02,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:53:02,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:53:02,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:53:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:53:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:53:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:53:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:53:02,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:53:02,194 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:53:02,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:53:02,308 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:53:02,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:53:02,312 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:53:02,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:02 BoogieIcfgContainer [2022-01-31 08:53:02,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:53:02,314 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:53:02,314 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:53:02,320 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:53:02,322 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:02" (1/1) ... [2022-01-31 08:53:02,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:53:02 BasicIcfg [2022-01-31 08:53:02,333 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:53:02,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:53:02,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:53:02,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:53:02,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:53:01" (1/4) ... [2022-01-31 08:53:02,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548599af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:02, skipping insertion in model container [2022-01-31 08:53:02,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:53:02" (2/4) ... [2022-01-31 08:53:02,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548599af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:53:02, skipping insertion in model container [2022-01-31 08:53:02,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:53:02" (3/4) ... [2022-01-31 08:53:02,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@548599af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:53:02, skipping insertion in model container [2022-01-31 08:53:02,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:53:02" (4/4) ... [2022-01-31 08:53:02,345 INFO L111 eAbstractionObserver]: Analyzing ICFG nr5.cJordan [2022-01-31 08:53:02,349 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:53:02,349 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:53:02,398 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:53:02,403 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 08:53:02,403 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:53:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:53:02,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:02,441 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] [2022-01-31 08:53:02,442 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1364086043, now seen corresponding path program 1 times [2022-01-31 08:53:02,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:02,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041116704] [2022-01-31 08:53:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:02,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:02,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:02,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:02,597 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 08:53:02,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:02,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041116704] [2022-01-31 08:53:02,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041116704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:53:02,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:53:02,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:53:02,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207027099] [2022-01-31 08:53:02,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:53:02,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:53:02,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:53:02,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:53:02,623 INFO L87 Difference]: Start difference. First operand has 37 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 08:53:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:02,669 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-01-31 08:53:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:53:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 22 [2022-01-31 08:53:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:02,676 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:53:02,676 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 08:53:02,677 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 08:53:02,679 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:02,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:53:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 08:53:02,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 08:53:02,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:53:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 08:53:02,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 08:53:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:02,705 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 08:53:02,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 08:53:02,705 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 08:53:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:53:02,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:02,706 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] [2022-01-31 08:53:02,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:53:02,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:02,707 INFO L85 PathProgramCache]: Analyzing trace with hash 507807011, now seen corresponding path program 1 times [2022-01-31 08:53:02,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:02,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946954042] [2022-01-31 08:53:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:02,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:02,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:02,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:02,819 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 08:53:02,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:02,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946954042] [2022-01-31 08:53:02,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946954042] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:53:02,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:53:02,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:53:02,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176647749] [2022-01-31 08:53:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:53:02,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:53:02,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:53:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:53:02,821 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:02,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:02,897 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-01-31 08:53:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:53:02,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 08:53:02,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:02,899 INFO L225 Difference]: With dead ends: 37 [2022-01-31 08:53:02,899 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 08:53:02,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:53:02,900 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:02,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:53:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 08:53:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-31 08:53:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 08:53:02,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-01-31 08:53:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:02,905 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 08:53:02,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 08:53:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 08:53:02,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:02,906 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] [2022-01-31 08:53:02,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:53:02,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash 508730532, now seen corresponding path program 1 times [2022-01-31 08:53:02,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:02,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497365565] [2022-01-31 08:53:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:02,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,048 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 08:53:03,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:03,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497365565] [2022-01-31 08:53:03,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497365565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:53:03,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:53:03,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 08:53:03,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074935971] [2022-01-31 08:53:03,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:53:03,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 08:53:03,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:03,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 08:53:03,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:53:03,050 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:53:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:03,129 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-01-31 08:53:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:53:03,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 08:53:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:03,131 INFO L225 Difference]: With dead ends: 41 [2022-01-31 08:53:03,131 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 08:53:03,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:53:03,136 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:03,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 41 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:53:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 08:53:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-01-31 08:53:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-01-31 08:53:03,148 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 22 [2022-01-31 08:53:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:03,149 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-01-31 08:53:03,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:53:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-01-31 08:53:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 08:53:03,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:03,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:53:03,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:53:03,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1333305547, now seen corresponding path program 1 times [2022-01-31 08:53:03,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:03,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916631911] [2022-01-31 08:53:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:03,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:03,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:03,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916631911] [2022-01-31 08:53:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916631911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:53:03,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:53:03,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:53:03,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793533431] [2022-01-31 08:53:03,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:53:03,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:53:03,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:53:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:53:03,196 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:03,230 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-31 08:53:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:53:03,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-01-31 08:53:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:03,231 INFO L225 Difference]: With dead ends: 40 [2022-01-31 08:53:03,231 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 08:53:03,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:53:03,238 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:03,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:53:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 08:53:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-01-31 08:53:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-31 08:53:03,244 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 25 [2022-01-31 08:53:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:03,244 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-31 08:53:03,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-31 08:53:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 08:53:03,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:03,245 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] [2022-01-31 08:53:03,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 08:53:03,246 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:03,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1280716363, now seen corresponding path program 1 times [2022-01-31 08:53:03,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:03,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425494707] [2022-01-31 08:53:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:03,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:03,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425494707] [2022-01-31 08:53:03,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425494707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636658358] [2022-01-31 08:53:03,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:03,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:03,308 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 08:53:03,339 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 08:53:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:53:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:03,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:03,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636658358] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:03,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:03,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:53:03,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353760403] [2022-01-31 08:53:03,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:03,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:53:03,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:03,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:53:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:53:03,502 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:03,586 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-01-31 08:53:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:53:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 08:53:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:03,587 INFO L225 Difference]: With dead ends: 47 [2022-01-31 08:53:03,587 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 08:53:03,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:53:03,588 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:03,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:53:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 08:53:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-31 08:53:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 38 states have internal predecessors, (45), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-01-31 08:53:03,591 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 28 [2022-01-31 08:53:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:03,591 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-01-31 08:53:03,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-01-31 08:53:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 08:53:03,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:03,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:53:03,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 08:53:03,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:03,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1353531189, now seen corresponding path program 2 times [2022-01-31 08:53:03,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:03,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849734371] [2022-01-31 08:53:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:03,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:03,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:03,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849734371] [2022-01-31 08:53:03,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849734371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457154118] [2022-01-31 08:53:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:53:03,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:03,911 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 08:53:03,912 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 08:53:03,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:53:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:53:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:53:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:04,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:04,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457154118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:04,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:04,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2022-01-31 08:53:04,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170262725] [2022-01-31 08:53:04,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:04,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 08:53:04,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 08:53:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:53:04,095 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:04,169 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-01-31 08:53:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 08:53:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-01-31 08:53:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:04,170 INFO L225 Difference]: With dead ends: 50 [2022-01-31 08:53:04,170 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:53:04,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:53:04,170 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 30 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:04,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:53:04,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:53:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-31 08:53:04,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-01-31 08:53:04,174 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 37 [2022-01-31 08:53:04,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:04,174 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-01-31 08:53:04,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:53:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-01-31 08:53:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:53:04,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:04,175 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 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 08:53:04,197 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 08:53:04,398 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,SelfDestructingSolverStorable5 [2022-01-31 08:53:04,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1261957557, now seen corresponding path program 3 times [2022-01-31 08:53:04,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:04,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290374665] [2022-01-31 08:53:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:04,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:04,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:04,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:04,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:04,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290374665] [2022-01-31 08:53:04,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290374665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:04,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291354788] [2022-01-31 08:53:04,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:53:04,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:04,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:04,485 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 08:53:04,515 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 08:53:04,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:53:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:53:04,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:53:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 08:53:04,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 08:53:04,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291354788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:04,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:04,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-01-31 08:53:04,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806277108] [2022-01-31 08:53:04,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:04,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 08:53:04,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:04,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 08:53:04,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:53:04,686 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:53:04,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:04,802 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-01-31 08:53:04,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 08:53:04,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-01-31 08:53:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:04,803 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:53:04,803 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 08:53:04,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-31 08:53:04,803 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 43 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:04,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:53:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 08:53:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-01-31 08:53:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 44 states have internal predecessors, (49), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:53:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-01-31 08:53:04,806 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 40 [2022-01-31 08:53:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:04,807 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-01-31 08:53:04,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:53:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-01-31 08:53:04,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:53:04,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:04,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:53:04,828 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 08:53:05,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:05,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1391040276, now seen corresponding path program 1 times [2022-01-31 08:53:05,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:05,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693814649] [2022-01-31 08:53:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:05,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:05,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:05,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-31 08:53:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:05,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:05,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693814649] [2022-01-31 08:53:05,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693814649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:05,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115211606] [2022-01-31 08:53:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:05,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:05,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:05,434 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 08:53:05,464 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 08:53:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-31 08:53:05,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:05,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-31 08:53:05,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:05,659 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 31 treesize of output 30 [2022-01-31 08:53:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:05,708 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 31 treesize of output 30 [2022-01-31 08:53:05,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:05,756 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 31 treesize of output 30 [2022-01-31 08:53:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:53:05,817 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 24 treesize of output 23 [2022-01-31 08:53:05,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:53:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:53:05,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:40,794 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~j~0_35 Int)) (or (not (<= (+ v_main_~j~0_35 1) c_main_~j~0)) (forall ((v_ArrVal_92 Int) (v_ArrVal_94 Int) (v_main_~j~0_34 Int)) (or (not (<= (+ v_main_~j~0_34 1) v_main_~j~0_35)) (<= c_main_~MINVAL~0 (select (let ((.cse0 (* c_main_~i~0 20))) (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ |c_main_~#volArray~0.offset| (* v_main_~j~0_35 (- 4)) .cse0) v_ArrVal_92) (+ |c_main_~#volArray~0.offset| .cse0 (* v_main_~j~0_34 (- 4))) v_ArrVal_94)) |c_main_~#volArray~0.offset|)))))) is different from false [2022-01-31 08:53:50,994 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~j~0_36 Int)) (or (not (<= (+ v_main_~j~0_36 1) c_main_~j~0)) (forall ((v_ArrVal_92 Int) (v_ArrVal_89 Int) (v_main_~j~0_35 Int) (v_ArrVal_94 Int) (v_main_~j~0_34 Int)) (or (<= c_main_~MINVAL~0 (select (let ((.cse0 (* c_main_~i~0 20))) (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~j~0_36 (- 4)) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_89) (+ |c_main_~#volArray~0.offset| (* v_main_~j~0_35 (- 4)) .cse0) v_ArrVal_92) (+ |c_main_~#volArray~0.offset| .cse0 (* v_main_~j~0_34 (- 4))) v_ArrVal_94)) |c_main_~#volArray~0.offset|)) (not (<= (+ v_main_~j~0_35 1) v_main_~j~0_36)) (not (<= (+ v_main_~j~0_34 1) v_main_~j~0_35)))))) is different from false [2022-01-31 08:54:04,541 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~j~0_37 Int)) (or (forall ((v_ArrVal_92 Int) (v_ArrVal_88 Int) (v_ArrVal_89 Int) (v_main_~j~0_36 Int) (v_main_~j~0_35 Int) (v_ArrVal_94 Int) (v_main_~j~0_34 Int)) (or (not (<= (+ v_main_~j~0_36 1) v_main_~j~0_37)) (not (<= (+ v_main_~j~0_35 1) v_main_~j~0_36)) (not (<= (+ v_main_~j~0_34 1) v_main_~j~0_35)) (<= c_main_~MINVAL~0 (select (let ((.cse0 (* c_main_~i~0 20))) (store (store (store (store (select |c_#memory_int| |c_main_~#volArray~0.base|) (+ (* v_main_~j~0_37 (- 4)) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_88) (+ (* v_main_~j~0_36 (- 4)) |c_main_~#volArray~0.offset| .cse0) v_ArrVal_89) (+ |c_main_~#volArray~0.offset| (* v_main_~j~0_35 (- 4)) .cse0) v_ArrVal_92) (+ |c_main_~#volArray~0.offset| .cse0 (* v_main_~j~0_34 (- 4))) v_ArrVal_94)) |c_main_~#volArray~0.offset|)))) (not (<= (+ v_main_~j~0_37 1) c_main_~j~0)))) is different from false [2022-01-31 08:54:04,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2022-01-31 08:54:04,593 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 110824 treesize of output 110568