/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:34:44,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:34:44,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:34:44,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:34:44,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:34:44,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:34:44,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:34:44,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:34:44,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:34:44,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:34:44,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:34:44,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:34:44,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:34:44,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:34:44,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:34:44,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:34:44,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:34:44,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:34:44,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:34:44,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:34:44,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:34:44,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:34:44,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:34:44,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:34:44,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:34:44,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:34:44,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:34:44,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:34:44,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:34:44,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:34:44,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:34:44,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:34:44,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:34:44,952 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:34:44,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:34:44,952 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:34:44,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:34:44,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:34:44,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:34:44,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:34:44,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:34:44,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:34:44,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:34:44,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:34:44,953 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:34:44,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:34:45,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:34:45,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:34:45,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:34:45,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:34:45,133 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:34:45,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-01-31 12:34:45,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9589c0575/39563b508b6644fca89d6e9f0e56f95f/FLAG94c8c15d9 [2022-01-31 12:34:45,559 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:34:45,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2022-01-31 12:34:45,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9589c0575/39563b508b6644fca89d6e9f0e56f95f/FLAG94c8c15d9 [2022-01-31 12:34:45,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9589c0575/39563b508b6644fca89d6e9f0e56f95f [2022-01-31 12:34:45,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:34:45,578 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:34:45,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:34:45,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:34:45,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:34:45,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcea835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45, skipping insertion in model container [2022-01-31 12:34:45,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,586 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:34:45,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:34:45,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-01-31 12:34:45,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:34:45,794 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:34:45,862 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2022-01-31 12:34:45,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:34:45,875 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:34:45,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45 WrapperNode [2022-01-31 12:34:45,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:34:45,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:34:45,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:34:45,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:34:45,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:34:45,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:34:45,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:34:45,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:34:45,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (1/1) ... [2022-01-31 12:34:45,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:34:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:34:45,995 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 12:34:46,011 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 12:34:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:34:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:34:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:34:46,032 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:34:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:34:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:34:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:34:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:34:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-01-31 12:34:46,033 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-01-31 12:34:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:34:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:34:46,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 12:34:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:34:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-31 12:34:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:34:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:34:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:34:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:34:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:34:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-31 12:34:46,142 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:34:46,143 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:34:46,605 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:34:46,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:34:46,611 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 12:34:46,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:34:46 BoogieIcfgContainer [2022-01-31 12:34:46,612 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:34:46,613 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:34:46,613 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:34:46,614 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:34:46,616 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:34:46" (1/1) ... [2022-01-31 12:34:46,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:34:46 BasicIcfg [2022-01-31 12:34:46,662 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:34:46,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:34:46,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:34:46,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:34:46,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:34:45" (1/4) ... [2022-01-31 12:34:46,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165e75b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:34:46, skipping insertion in model container [2022-01-31 12:34:46,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:34:45" (2/4) ... [2022-01-31 12:34:46,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165e75b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:34:46, skipping insertion in model container [2022-01-31 12:34:46,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:34:46" (3/4) ... [2022-01-31 12:34:46,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@165e75b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:34:46, skipping insertion in model container [2022-01-31 12:34:46,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:34:46" (4/4) ... [2022-01-31 12:34:46,688 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.cJordan [2022-01-31 12:34:46,691 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:34:46,692 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:34:46,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:34:46,724 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 12:34:46,724 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:34:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:34:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 12:34:46,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:34:46,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:34:46,749 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:34:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:34:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 542394869, now seen corresponding path program 1 times [2022-01-31 12:34:46,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:34:46,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683516956] [2022-01-31 12:34:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:34:46,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:34:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:34:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:47,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:34:47,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683516956] [2022-01-31 12:34:47,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683516956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:34:47,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:34:47,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 12:34:47,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143660441] [2022-01-31 12:34:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:34:47,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 12:34:47,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:34:47,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 12:34:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-31 12:34:47,457 INFO L87 Difference]: Start difference. First operand has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:34:48,022 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-01-31 12:34:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 12:34:48,024 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 12:34:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:34:48,028 INFO L225 Difference]: With dead ends: 85 [2022-01-31 12:34:48,029 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 12:34:48,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-01-31 12:34:48,032 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 120 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 12:34:48,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 717 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 12:34:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 12:34:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-01-31 12:34:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-01-31 12:34:48,054 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2022-01-31 12:34:48,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:34:48,055 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-01-31 12:34:48,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:48,055 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-01-31 12:34:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 12:34:48,056 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:34:48,056 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:34:48,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:34:48,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:34:48,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:34:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1761345441, now seen corresponding path program 1 times [2022-01-31 12:34:48,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:34:48,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712842573] [2022-01-31 12:34:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:34:48,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:34:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:48,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:34:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:48,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:34:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712842573] [2022-01-31 12:34:48,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712842573] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:34:48,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747523383] [2022-01-31 12:34:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:34:48,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:34:48,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:34:48,492 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 12:34:48,499 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 12:34:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 12:34:48,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:34:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:34:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:49,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747523383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:34:49,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:34:49,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-01-31 12:34:49,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392045790] [2022-01-31 12:34:49,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:34:49,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 12:34:49,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:34:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 12:34:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2022-01-31 12:34:49,357 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:34:54,901 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-01-31 12:34:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 12:34:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 12:34:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:34:54,903 INFO L225 Difference]: With dead ends: 116 [2022-01-31 12:34:54,903 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 12:34:54,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=690, Invalid=2066, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 12:34:54,905 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 550 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 12:34:54,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 304 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 12:34:54,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 12:34:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2022-01-31 12:34:54,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-01-31 12:34:54,911 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 53 [2022-01-31 12:34:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:34:54,911 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-01-31 12:34:54,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:34:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-01-31 12:34:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 12:34:54,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:34:54,914 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:34:54,934 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 12:34:55,126 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 12:34:55,127 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:34:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:34:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash -778767649, now seen corresponding path program 2 times [2022-01-31 12:34:55,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:34:55,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197576609] [2022-01-31 12:34:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:34:55,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:34:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:55,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:34:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:34:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:55,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:34:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197576609] [2022-01-31 12:34:55,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197576609] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:34:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774400104] [2022-01-31 12:34:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:34:55,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:34:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:34:55,791 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 12:34:55,795 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 12:34:56,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:34:56,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:34:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 12:34:56,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:34:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:56,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:34:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:34:57,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774400104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:34:57,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:34:57,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 56 [2022-01-31 12:34:57,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611531659] [2022-01-31 12:34:57,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:34:57,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 12:34:57,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:34:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 12:34:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 12:34:57,657 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:35:51,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:35:51,999 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-01-31 12:35:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 12:35:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 12:35:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:35:52,002 INFO L225 Difference]: With dead ends: 216 [2022-01-31 12:35:52,002 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 12:35:52,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 54.1s TimeCoverageRelationStatistics Valid=2215, Invalid=7097, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 12:35:52,005 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1152 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 12:35:52,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 825 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 12:35:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 12:35:52,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2022-01-31 12:35:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:35:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2022-01-31 12:35:52,020 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 113 [2022-01-31 12:35:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:35:52,021 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2022-01-31 12:35:52,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:35:52,021 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2022-01-31 12:35:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 12:35:52,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:35:52,027 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:35:52,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 12:35:52,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 12:35:52,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:35:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:35:52,228 INFO L85 PathProgramCache]: Analyzing trace with hash 940366943, now seen corresponding path program 3 times [2022-01-31 12:35:52,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:35:52,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509325537] [2022-01-31 12:35:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:35:52,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:35:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:35:54,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:35:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:35:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 99 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:35:54,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:35:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509325537] [2022-01-31 12:35:54,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509325537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:35:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926877595] [2022-01-31 12:35:54,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:35:54,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:35:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:35:54,526 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 12:35:54,527 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 12:35:54,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 12:35:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:35:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 12:35:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:35:55,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 12:35:55,529 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 23 treesize of output 23