/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/reducercommutativity/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:44:53,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:44:53,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:44:53,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:44:53,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:44:53,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:44:53,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:44:53,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:44:53,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:44:53,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:44:53,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:44:53,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:44:53,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:44:53,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:44:53,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:44:53,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:44:53,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:44:53,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:44:53,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:44:53,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:44:53,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:44:53,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:44:53,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:44:53,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:44:53,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:44:53,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:44:53,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:44:53,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:44:53,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:44:53,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:44:53,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:44:53,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:44:53,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:44:53,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:44:53,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:44:53,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:44:53,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:44:53,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:44:53,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:44:53,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:44:53,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:44:53,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:44:53,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:44:53,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:44:53,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:44:53,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:44:53,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:44:53,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:44:53,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:44:53,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:44:53,826 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:44:53,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:44:54,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:44:54,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:44:54,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:44:54,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:44:54,047 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:44:54,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2022-01-31 08:44:54,118 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b454d72/7e54b0359e6240d0aaf93883c69a9ed4/FLAGb87887eeb [2022-01-31 08:44:54,480 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:44:54,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i [2022-01-31 08:44:54,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b454d72/7e54b0359e6240d0aaf93883c69a9ed4/FLAGb87887eeb [2022-01-31 08:44:54,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b454d72/7e54b0359e6240d0aaf93883c69a9ed4 [2022-01-31 08:44:54,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:44:54,899 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:44:54,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:44:54,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:44:54,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:44:54,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:44:54" (1/1) ... [2022-01-31 08:44:54,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@285cc8e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:54, skipping insertion in model container [2022-01-31 08:44:54,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:44:54" (1/1) ... [2022-01-31 08:44:54,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:44:54,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:44:55,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i[1282,1295] [2022-01-31 08:44:55,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:44:55,069 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:44:55,082 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i[1282,1295] [2022-01-31 08:44:55,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:44:55,092 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:44:55,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55 WrapperNode [2022-01-31 08:44:55,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:44:55,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:44:55,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:44:55,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:44:55,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:44:55,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:44:55,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:44:55,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:44:55,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:44:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:44:55,156 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 08:44:55,162 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 08:44:55,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:44:55,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:44:55,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:44:55,190 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-31 08:44:55,190 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:44:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:44:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:44:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:44:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:44:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:44:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:44:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:44:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-31 08:44:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:44:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:44:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:44:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:44:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:44:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:44:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:44:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:44:55,245 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:44:55,246 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:44:55,381 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:44:55,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:44:55,385 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:44:55,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:44:55 BoogieIcfgContainer [2022-01-31 08:44:55,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:44:55,387 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:44:55,387 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:44:55,388 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:44:55,390 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:44:55" (1/1) ... [2022-01-31 08:44:55,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:44:55 BasicIcfg [2022-01-31 08:44:55,403 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:44:55,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:44:55,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:44:55,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:44:55,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:44:54" (1/4) ... [2022-01-31 08:44:55,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75267ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:44:55, skipping insertion in model container [2022-01-31 08:44:55,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:44:55" (2/4) ... [2022-01-31 08:44:55,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75267ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:44:55, skipping insertion in model container [2022-01-31 08:44:55,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:44:55" (3/4) ... [2022-01-31 08:44:55,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75267ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:44:55, skipping insertion in model container [2022-01-31 08:44:55,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:44:55" (4/4) ... [2022-01-31 08:44:55,408 INFO L111 eAbstractionObserver]: Analyzing ICFG sum.iJordan [2022-01-31 08:44:55,412 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:44:55,412 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:44:55,445 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:44:55,454 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 08:44:55,454 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:44:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:44:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:44:55,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:44:55,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:44:55,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:44:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:44:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1496605831, now seen corresponding path program 1 times [2022-01-31 08:44:55,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:44:55,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133703062] [2022-01-31 08:44:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:55,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:44:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:44:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:44:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:44:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:44:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:44:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:44:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133703062] [2022-01-31 08:44:55,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133703062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:44:55,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:44:55,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:44:55,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499621481] [2022-01-31 08:44:55,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:44:55,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:44:55,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:44:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:44:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:44:55,735 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:44:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:44:55,795 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 08:44:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:44:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:44:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:44:55,805 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:44:55,805 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 08:44:55,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 08:44:55,808 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:44:55,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:44:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 08:44:55,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-31 08:44:55,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:44:55,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 08:44:55,840 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 32 [2022-01-31 08:44:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:44:55,840 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 08:44:55,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:44:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 08:44:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:44:55,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:44:55,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:44:55,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:44:55,842 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:44:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:44:55,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1321388457, now seen corresponding path program 1 times [2022-01-31 08:44:55,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:44:55,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552301823] [2022-01-31 08:44:55,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:55,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:44:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:44:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:44:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:44:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:44:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:44:55,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:44:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552301823] [2022-01-31 08:44:55,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552301823] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:44:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898982944] [2022-01-31 08:44:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:55,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:44:55,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:44:55,967 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 08:44:55,975 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 08:44:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:44:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:44:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:44:56,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:44:56,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898982944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:44:56,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:44:56,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-01-31 08:44:56,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015249873] [2022-01-31 08:44:56,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:44:56,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:44:56,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:44:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:44:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:44:56,190 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:44:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:44:56,217 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 08:44:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 08:44:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-01-31 08:44:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:44:56,218 INFO L225 Difference]: With dead ends: 27 [2022-01-31 08:44:56,218 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:44:56,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 08:44:56,219 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:44:56,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 34 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:44:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:44:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 08:44:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:44:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-01-31 08:44:56,232 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 32 [2022-01-31 08:44:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:44:56,232 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-01-31 08:44:56,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:44:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-01-31 08:44:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 08:44:56,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:44:56,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:44:56,251 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 08:44:56,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:44:56,453 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:44:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:44:56,454 INFO L85 PathProgramCache]: Analyzing trace with hash -208069594, now seen corresponding path program 1 times [2022-01-31 08:44:56,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:44:56,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818934533] [2022-01-31 08:44:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:56,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:44:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:44:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:44:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:44:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:44:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:44:56,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:44:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818934533] [2022-01-31 08:44:56,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818934533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:44:56,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:44:56,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:44:56,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464044148] [2022-01-31 08:44:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:44:56,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:44:56,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:44:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:44:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:44:56,593 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:44:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:44:56,647 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-01-31 08:44:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:44:56,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-01-31 08:44:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:44:56,650 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:44:56,650 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 08:44:56,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:44:56,659 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:44:56,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:44:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 08:44:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 08:44:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:44:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-31 08:44:56,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 38 [2022-01-31 08:44:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:44:56,671 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-31 08:44:56,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 08:44:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-31 08:44:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:44:56,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:44:56,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:44:56,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 08:44:56,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:44:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:44:56,675 INFO L85 PathProgramCache]: Analyzing trace with hash -873922685, now seen corresponding path program 1 times [2022-01-31 08:44:56,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:44:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744859917] [2022-01-31 08:44:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:56,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:44:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:44:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:44:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:44:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:44:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:44:56,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:44:56,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744859917] [2022-01-31 08:44:56,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744859917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:44:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175425319] [2022-01-31 08:44:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:56,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:44:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:44:56,827 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 08:44:56,828 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 08:44:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:56,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:44:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:44:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-31 08:44:56,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:44:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 08:44:57,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175425319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:44:57,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:44:57,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 6] total 11 [2022-01-31 08:44:57,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504987776] [2022-01-31 08:44:57,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:44:57,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 08:44:57,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:44:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 08:44:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 08:44:57,101 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 08:44:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:44:57,212 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-01-31 08:44:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 08:44:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 40 [2022-01-31 08:44:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:44:57,216 INFO L225 Difference]: With dead ends: 30 [2022-01-31 08:44:57,217 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:44:57,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-01-31 08:44:57,223 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:44:57,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 48 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:44:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:44:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:44:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:44:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-31 08:44:57,230 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 40 [2022-01-31 08:44:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:44:57,231 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-31 08:44:57,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 3 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-31 08:44:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-31 08:44:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 08:44:57,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:44:57,233 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:44:57,251 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 08:44:57,447 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,SelfDestructingSolverStorable3 [2022-01-31 08:44:57,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:44:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:44:57,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1994173184, now seen corresponding path program 2 times [2022-01-31 08:44:57,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:44:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138018778] [2022-01-31 08:44:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:44:57,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:44:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:58,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:44:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:44:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:59,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:44:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:59,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:44:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:44:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-31 08:44:59,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:44:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138018778] [2022-01-31 08:44:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138018778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:44:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341907386] [2022-01-31 08:44:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:44:59,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:44:59,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:44:59,706 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 08:44:59,707 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 08:44:59,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:44:59,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:44:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-31 08:45:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:00,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:00,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 71 [2022-01-31 08:45:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:01,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:01,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 100 [2022-01-31 08:45:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:01,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:01,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 112 [2022-01-31 08:45:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:02,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:02,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:02,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 193 [2022-01-31 08:45:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:45:04,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:06,667 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 473 treesize of output 369 [2022-01-31 08:45:06,677 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-31 08:45:06,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 547 treesize of output 447 [2022-01-31 08:45:07,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:07,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 52 [2022-01-31 08:45:07,900 INFO L353 Elim1Store]: treesize reduction 30, result has 63.4 percent of original size [2022-01-31 08:45:07,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 89 [2022-01-31 08:45:08,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:08,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2022-01-31 08:45:08,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 117 [2022-01-31 08:45:08,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:08,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:08,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:08,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 112 [2022-01-31 08:45:22,691 WARN L228 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 124 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:45:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 08:45:22,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341907386] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:22,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:22,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 28] total 68 [2022-01-31 08:45:22,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375298459] [2022-01-31 08:45:22,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:22,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 08:45:22,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:22,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 08:45:22,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=4207, Unknown=1, NotChecked=0, Total=4556 [2022-01-31 08:45:22,739 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 68 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 57 states have internal predecessors, (86), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 08:45:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:32,259 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-01-31 08:45:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 08:45:32,260 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 57 states have internal predecessors, (86), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 46 [2022-01-31 08:45:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:32,262 INFO L225 Difference]: With dead ends: 69 [2022-01-31 08:45:32,262 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 08:45:32,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=668, Invalid=7163, Unknown=1, NotChecked=0, Total=7832 [2022-01-31 08:45:32,265 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:32,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 276 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1273 Invalid, 0 Unknown, 124 Unchecked, 2.1s Time] [2022-01-31 08:45:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 08:45:32,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-01-31 08:45:32,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-31 08:45:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-01-31 08:45:32,270 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 46 [2022-01-31 08:45:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:32,270 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-01-31 08:45:32,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 57 states have internal predecessors, (86), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 08:45:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-01-31 08:45:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:45:32,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:32,272 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:45:32,276 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 08:45:32,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:32,476 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:32,477 INFO L85 PathProgramCache]: Analyzing trace with hash 32865821, now seen corresponding path program 3 times [2022-01-31 08:45:32,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:32,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229570275] [2022-01-31 08:45:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:32,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:32,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:32,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:45:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:32,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:45:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:32,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:45:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 08:45:32,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229570275] [2022-01-31 08:45:32,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229570275] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:32,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769058978] [2022-01-31 08:45:32,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:45:32,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:32,568 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 08:45:32,569 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 08:45:32,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:45:32,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:32,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 08:45:32,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 08:45:32,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:45:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:45:32,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769058978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:45:32,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:45:32,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 19 [2022-01-31 08:45:32,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422226865] [2022-01-31 08:45:32,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:45:32,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 08:45:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:45:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 08:45:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:45:32,862 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:45:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:45:33,185 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-01-31 08:45:33,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 08:45:33,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-01-31 08:45:33,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:45:33,186 INFO L225 Difference]: With dead ends: 58 [2022-01-31 08:45:33,186 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 08:45:33,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:45:33,187 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:45:33,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 166 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:45:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 08:45:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-01-31 08:45:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:45:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-01-31 08:45:33,190 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 48 [2022-01-31 08:45:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:45:33,190 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-01-31 08:45:33,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:45:33,190 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-01-31 08:45:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 08:45:33,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:45:33,191 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:45:33,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 08:45:33,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:33,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:45:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:45:33,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1367806554, now seen corresponding path program 4 times [2022-01-31 08:45:33,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:45:33,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075623871] [2022-01-31 08:45:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:45:33,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:45:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:34,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:45:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:34,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:45:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:45:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:45:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:45:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 08:45:35,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:45:35,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075623871] [2022-01-31 08:45:35,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075623871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:45:35,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872141443] [2022-01-31 08:45:35,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:45:35,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:45:35,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:45:35,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:45:35,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:45:36,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:45:36,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:45:36,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 123 conjunts are in the unsatisfiable core [2022-01-31 08:45:36,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:45:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:45:37,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:45:37,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 08:45:37,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 120 [2022-01-31 08:46:05,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:05,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:05,484 INFO L353 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2022-01-31 08:46:05,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 265 treesize of output 182 [2022-01-31 08:46:10,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:10,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:10,629 INFO L353 Elim1Store]: treesize reduction 206, result has 21.4 percent of original size [2022-01-31 08:46:10,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 31 case distinctions, treesize of input 265 treesize of output 226 [2022-01-31 08:46:36,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:36,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:36,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:36,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:46:36,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:46:36,196 INFO L353 Elim1Store]: treesize reduction 3, result has 70.0 percent of original size [2022-01-31 08:46:36,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 251 treesize of output 178 [2022-01-31 08:46:40,864 WARN L860 $PredicateComparison]: unable to prove that (exists ((~N~0 Int) (v_main_~i~1_14 Int)) (and (or (exists ((|v_main_~#x~0.base_BEFORE_CALL_7| Int) (aux_div_sum_~ret~0_27 Int)) (let ((.cse1 (* aux_div_sum_~ret~0_27 4294967296)) (.cse0 (let ((.cse3 (* v_main_~i~1_14 4)) (.cse2 (select |c_#memory_int| |v_main_~#x~0.base_BEFORE_CALL_7|))) (+ (select .cse2 (+ .cse3 (- 4))) (select .cse2 .cse3) (select .cse2 (+ (* ~N~0 4) (- 4))))))) (and (<= .cse0 (+ 2147483647 .cse1)) (<= .cse1 .cse0)))) (exists ((|v_main_~#x~0.base_BEFORE_CALL_7| Int) (v_prenex_1 Int) (aux_div_aux_mod_sum_~ret~0_27_38 Int)) (let ((.cse6 (let ((.cse8 (* v_main_~i~1_14 4)) (.cse7 (select |c_#memory_int| |v_main_~#x~0.base_BEFORE_CALL_7|))) (+ (select .cse7 (+ .cse8 (- 4))) (select .cse7 .cse8) (select .cse7 (+ (* ~N~0 4) (- 4)))))) (.cse5 (* 4294967296 v_prenex_1)) (.cse4 (* 4294967296 aux_div_aux_mod_sum_~ret~0_27_38))) (and (< .cse4 2147483648) (< (+ 2147483647 .cse5) .cse6) (< .cse6 (+ .cse5 4294967296 .cse4)))))) (<= ~N~0 (+ v_main_~i~1_14 2)) (<= v_main_~i~1_14 1) (< 2 ~N~0))) is different from true [2022-01-31 08:47:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:47:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:47:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:47:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 08:47:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:47:18,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:47:18,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 08:47:19,044 INFO L353 Elim1Store]: treesize reduction 48, result has 63.1 percent of original size [2022-01-31 08:47:19,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 479 treesize of output 270 [2022-01-31 08:47:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-31 08:47:22,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:47:27,077 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 343 treesize of output 263 [2022-01-31 08:47:27,085 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-31 08:47:27,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1953 treesize of output 1 [2022-01-31 08:47:28,214 INFO L353 Elim1Store]: treesize reduction 93, result has 60.9 percent of original size [2022-01-31 08:47:28,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 163 [2022-01-31 08:47:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 23 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:47:32,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872141443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:47:32,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:47:32,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 40, 36] total 100 [2022-01-31 08:47:32,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567391412] [2022-01-31 08:47:32,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:47:32,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 08:47:32,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:47:32,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 08:47:32,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=9141, Unknown=26, NotChecked=194, Total=9900 [2022-01-31 08:47:32,978 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 100 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 88 states have internal predecessors, (117), 9 states have call successors, (12), 4 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:48:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:48:59,386 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-01-31 08:48:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 08:48:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 88 states have internal predecessors, (117), 9 states have call successors, (12), 4 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 54 [2022-01-31 08:48:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:48:59,392 INFO L225 Difference]: With dead ends: 94 [2022-01-31 08:48:59,392 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 08:48:59,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 128 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 5774 ImplicationChecksByTransitivity, 166.1s TimeCoverageRelationStatistics Valid=966, Invalid=15497, Unknown=53, NotChecked=254, Total=16770 [2022-01-31 08:48:59,397 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 08:48:59,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 475 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 833 Invalid, 0 Unknown, 419 Unchecked, 0.8s Time] [2022-01-31 08:48:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 08:48:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2022-01-31 08:48:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 65 states have internal predecessors, (72), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-01-31 08:48:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2022-01-31 08:48:59,407 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 54 [2022-01-31 08:48:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:48:59,407 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2022-01-31 08:48:59,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 92 states have (on average 1.2717391304347827) internal successors, (117), 88 states have internal predecessors, (117), 9 states have call successors, (12), 4 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 08:48:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2022-01-31 08:48:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 08:48:59,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:48:59,410 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:48:59,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:48:59,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:59,617 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:48:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:48:59,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1079987447, now seen corresponding path program 5 times [2022-01-31 08:48:59,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:48:59,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195627185] [2022-01-31 08:48:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:48:59,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:48:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:59,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:48:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:59,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:48:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:59,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:48:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:59,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:48:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:48:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:48:59,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:48:59,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195627185] [2022-01-31 08:48:59,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195627185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:48:59,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245534925] [2022-01-31 08:48:59,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:48:59,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:48:59,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:48:59,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:48:59,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 08:48:59,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 08:48:59,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:48:59,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 08:48:59,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:48:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 63 proven. 59 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 08:48:59,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 51 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 08:49:00,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245534925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:00,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:00,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 21 [2022-01-31 08:49:00,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003409039] [2022-01-31 08:49:00,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:00,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:49:00,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:00,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:49:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:49:00,180 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:49:00,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:00,490 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2022-01-31 08:49:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:49:00,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2022-01-31 08:49:00,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:00,492 INFO L225 Difference]: With dead ends: 106 [2022-01-31 08:49:00,492 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 08:49:00,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 08:49:00,493 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:00,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 197 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:49:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 08:49:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2022-01-31 08:49:00,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 66 states have internal predecessors, (71), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:49:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2022-01-31 08:49:00,497 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 56 [2022-01-31 08:49:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:00,498 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2022-01-31 08:49:00,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:49:00,498 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2022-01-31 08:49:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 08:49:00,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:00,499 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:00,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 08:49:00,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:00,704 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -965903404, now seen corresponding path program 6 times [2022-01-31 08:49:00,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:00,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803514896] [2022-01-31 08:49:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:00,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:00,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:00,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:49:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:00,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-31 08:49:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 08:49:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 11 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 08:49:00,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803514896] [2022-01-31 08:49:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803514896] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983910311] [2022-01-31 08:49:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:49:00,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:00,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:49:00,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 08:49:00,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 08:49:00,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:49:00,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 08:49:00,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 19 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-31 08:49:01,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 60 proven. 19 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-31 08:49:01,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983910311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:01,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:01,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 24 [2022-01-31 08:49:01,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138687744] [2022-01-31 08:49:01,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:01,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 08:49:01,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:01,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 08:49:01,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:49:01,167 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 08:49:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:01,595 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-01-31 08:49:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:49:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2022-01-31 08:49:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:01,596 INFO L225 Difference]: With dead ends: 88 [2022-01-31 08:49:01,597 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 08:49:01,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 08:49:01,598 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:01,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 115 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:49:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 08:49:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2022-01-31 08:49:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:49:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2022-01-31 08:49:01,600 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 58 [2022-01-31 08:49:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:01,601 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2022-01-31 08:49:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-31 08:49:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2022-01-31 08:49:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 08:49:01,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:01,602 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:01,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:01,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:01,808 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:01,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1269356823, now seen corresponding path program 7 times [2022-01-31 08:49:01,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:01,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316532174] [2022-01-31 08:49:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:01,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:01,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:49:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:01,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:49:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:01,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:49:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 08:49:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 9 proven. 99 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-31 08:49:01,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:49:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316532174] [2022-01-31 08:49:01,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316532174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:49:01,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340022532] [2022-01-31 08:49:01,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:49:01,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:49:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:49:01,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:49:01,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 08:49:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:49:01,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 08:49:01,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:49:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 100 proven. 43 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-31 08:49:02,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:49:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 9 proven. 99 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-31 08:49:02,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340022532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:49:02,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:49:02,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-01-31 08:49:02,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445497774] [2022-01-31 08:49:02,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:49:02,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:49:02,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:49:02,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:49:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:49:02,181 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 08:49:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:49:02,372 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-01-31 08:49:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:49:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 60 [2022-01-31 08:49:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:49:02,373 INFO L225 Difference]: With dead ends: 59 [2022-01-31 08:49:02,373 INFO L226 Difference]: Without dead ends: 59 [2022-01-31 08:49:02,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-01-31 08:49:02,374 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:49:02,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:49:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-31 08:49:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2022-01-31 08:49:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:49:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-01-31 08:49:02,378 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 60 [2022-01-31 08:49:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:49:02,378 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-01-31 08:49:02,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 08:49:02,379 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-01-31 08:49:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 08:49:02,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:49:02,379 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:49:02,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 08:49:02,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:49:02,599 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:49:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:49:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1049457716, now seen corresponding path program 8 times [2022-01-31 08:49:02,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:49:02,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801315132] [2022-01-31 08:49:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:49:02,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:49:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat