/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/loops/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 16:55:47,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 16:55:47,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 16:55:47,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 16:55:47,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 16:55:47,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 16:55:47,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 16:55:47,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 16:55:47,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 16:55:47,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 16:55:47,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 16:55:47,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 16:55:47,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 16:55:47,998 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 16:55:47,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 16:55:48,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 16:55:48,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 16:55:48,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 16:55:48,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 16:55:48,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 16:55:48,004 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 16:55:48,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 16:55:48,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 16:55:48,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 16:55:48,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 16:55:48,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 16:55:48,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 16:55:48,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 16:55:48,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 16:55:48,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 16:55:48,045 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 16:55:48,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 16:55:48,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 16:55:48,047 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 16:55:48,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 16:55:48,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 16:55:48,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 16:55:48,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 16:55:48,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 16:55:48,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 16:55:48,049 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 16:55:48,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 16:55:48,049 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 16:55:48,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 16:55:48,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 16:55:48,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 16:55:48,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 16:55:48,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 16:55:48,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:55:48,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 16:55:48,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 16:55:48,051 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 16:55:48,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 16:55:48,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 16:55:48,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 16:55:48,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 16:55:48,312 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 16:55:48,312 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 16:55:48,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-03-18 16:55:48,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5d276ccb/e431feff870646aea8fa9067679c9964/FLAGff0f3d331 [2022-03-18 16:55:48,739 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 16:55:48,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-03-18 16:55:48,747 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5d276ccb/e431feff870646aea8fa9067679c9964/FLAGff0f3d331 [2022-03-18 16:55:48,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5d276ccb/e431feff870646aea8fa9067679c9964 [2022-03-18 16:55:48,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 16:55:48,767 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 16:55:48,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 16:55:48,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 16:55:48,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 16:55:48,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:55:48" (1/1) ... [2022-03-18 16:55:48,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f3a74f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:48, skipping insertion in model container [2022-03-18 16:55:48,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:55:48" (1/1) ... [2022-03-18 16:55:48,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 16:55:48,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 16:55:48,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i[810,823] [2022-03-18 16:55:49,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:55:49,022 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 16:55:49,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i[810,823] [2022-03-18 16:55:49,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 16:55:49,064 INFO L208 MainTranslator]: Completed translation [2022-03-18 16:55:49,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49 WrapperNode [2022-03-18 16:55:49,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 16:55:49,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 16:55:49,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 16:55:49,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 16:55:49,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 16:55:49,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 16:55:49,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 16:55:49,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 16:55:49,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 16:55:49,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:49,144 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) [2022-03-18 16:55:49,163 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 [2022-03-18 16:55:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 16:55:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 16:55:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 16:55:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 16:55:49,188 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-03-18 16:55:49,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 16:55:49,188 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 16:55:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-03-18 16:55:49,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 16:55:49,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 16:55:49,266 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 16:55:49,267 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 16:55:49,361 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 16:55:49,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 16:55:49,365 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-18 16:55:49,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:55:49 BoogieIcfgContainer [2022-03-18 16:55:49,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 16:55:49,368 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 16:55:49,368 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 16:55:49,368 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 16:55:49,371 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:55:49" (1/1) ... [2022-03-18 16:55:49,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 04:55:49 BasicIcfg [2022-03-18 16:55:49,386 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 16:55:49,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 16:55:49,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 16:55:49,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 16:55:49,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:55:48" (1/4) ... [2022-03-18 16:55:49,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ec90f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:55:49, skipping insertion in model container [2022-03-18 16:55:49,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:55:49" (2/4) ... [2022-03-18 16:55:49,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ec90f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:55:49, skipping insertion in model container [2022-03-18 16:55:49,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:55:49" (3/4) ... [2022-03-18 16:55:49,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ec90f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:55:49, skipping insertion in model container [2022-03-18 16:55:49,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 04:55:49" (4/4) ... [2022-03-18 16:55:49,392 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.iJordan [2022-03-18 16:55:49,396 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 16:55:49,396 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 16:55:49,461 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 16:55:49,467 INFO L340 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 [2022-03-18 16:55:49,467 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 16:55:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 16:55:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 16:55:49,498 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:49,499 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:49,499 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:49,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:49,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1326105583, now seen corresponding path program 1 times [2022-03-18 16:55:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:49,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763526844] [2022-03-18 16:55:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:49,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:49,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 16:55:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:55:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:49,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763526844] [2022-03-18 16:55:49,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763526844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:55:49,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:55:49,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 16:55:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555968115] [2022-03-18 16:55:49,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:55:49,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 16:55:49,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:49,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 16:55:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 16:55:49,790 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 16:55:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:49,934 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-03-18 16:55:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 16:55:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-18 16:55:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:49,942 INFO L225 Difference]: With dead ends: 51 [2022-03-18 16:55:49,942 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 16:55:49,943 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:55:49,946 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:49,947 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:55:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 16:55:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-03-18 16:55:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-18 16:55:49,975 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-03-18 16:55:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:49,976 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-18 16:55:49,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 16:55:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-18 16:55:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 16:55:49,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:49,977 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:49,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 16:55:49,978 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:49,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489969, now seen corresponding path program 1 times [2022-03-18 16:55:49,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:49,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629743950] [2022-03-18 16:55:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:49,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-18 16:55:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:55:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:50,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629743950] [2022-03-18 16:55:50,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629743950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:55:50,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:55:50,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 16:55:50,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606942448] [2022-03-18 16:55:50,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:55:50,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 16:55:50,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 16:55:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 16:55:50,047 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 16:55:50,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:50,155 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-18 16:55:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 16:55:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-03-18 16:55:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:50,157 INFO L225 Difference]: With dead ends: 38 [2022-03-18 16:55:50,157 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 16:55:50,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-18 16:55:50,165 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:50,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:55:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 16:55:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-18 16:55:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:50,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-18 16:55:50,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-03-18 16:55:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:50,175 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-18 16:55:50,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 16:55:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-18 16:55:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 16:55:50,176 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:50,176 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:50,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 16:55:50,176 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 43929779, now seen corresponding path program 1 times [2022-03-18 16:55:50,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581796928] [2022-03-18 16:55:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-18 16:55:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:55:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581796928] [2022-03-18 16:55:50,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581796928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127722283] [2022-03-18 16:55:50,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:50,287 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) [2022-03-18 16:55:50,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 16:55:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 16:55:50,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:55:50,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 16:55:50,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127722283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:55:50,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:55:50,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-03-18 16:55:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568922193] [2022-03-18 16:55:50,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:50,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 16:55:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 16:55:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-18 16:55:50,507 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 16:55:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:50,698 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-03-18 16:55:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 16:55:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-03-18 16:55:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:50,701 INFO L225 Difference]: With dead ends: 47 [2022-03-18 16:55:50,701 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 16:55:50,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-18 16:55:50,708 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:50,708 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:55:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 16:55:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-03-18 16:55:50,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-18 16:55:50,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-03-18 16:55:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:50,715 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-18 16:55:50,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 16:55:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-18 16:55:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 16:55:50,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:50,717 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:50,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 16:55:50,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:50,928 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash -969564551, now seen corresponding path program 2 times [2022-03-18 16:55:50,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:50,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353840745] [2022-03-18 16:55:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:50,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 16:55:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 16:55:51,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:51,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353840745] [2022-03-18 16:55:51,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353840745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:55:51,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 16:55:51,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 16:55:51,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594909031] [2022-03-18 16:55:51,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:55:51,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 16:55:51,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 16:55:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 16:55:51,052 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 16:55:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:51,227 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-03-18 16:55:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 16:55:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-03-18 16:55:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:51,228 INFO L225 Difference]: With dead ends: 42 [2022-03-18 16:55:51,228 INFO L226 Difference]: Without dead ends: 42 [2022-03-18 16:55:51,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-18 16:55:51,229 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:51,230 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:55:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-18 16:55:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-03-18 16:55:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-18 16:55:51,234 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-03-18 16:55:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:51,234 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-18 16:55:51,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 16:55:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-18 16:55:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 16:55:51,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:51,236 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:51,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 16:55:51,236 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1845213134, now seen corresponding path program 1 times [2022-03-18 16:55:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339762157] [2022-03-18 16:55:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:51,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-18 16:55:51,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 16:55:51,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:51,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339762157] [2022-03-18 16:55:51,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339762157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:51,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266299080] [2022-03-18 16:55:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:51,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:51,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:51,356 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) [2022-03-18 16:55:51,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 16:55:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 16:55:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 16:55:51,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 16:55:51,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266299080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:55:51,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:55:51,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-18 16:55:51,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890871249] [2022-03-18 16:55:51,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:51,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 16:55:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 16:55:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 16:55:51,584 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 16:55:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:52,003 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-18 16:55:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 16:55:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2022-03-18 16:55:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:52,004 INFO L225 Difference]: With dead ends: 63 [2022-03-18 16:55:52,005 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 16:55:52,005 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-03-18 16:55:52,006 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:52,006 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 38 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 16:55:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 16:55:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-03-18 16:55:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-18 16:55:52,010 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2022-03-18 16:55:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:52,011 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-18 16:55:52,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 16:55:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-18 16:55:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 16:55:52,012 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:52,012 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:52,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 16:55:52,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:52,220 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1453502491, now seen corresponding path program 1 times [2022-03-18 16:55:52,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742915035] [2022-03-18 16:55:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:52,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:55:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 16:55:52,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742915035] [2022-03-18 16:55:52,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742915035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918469052] [2022-03-18 16:55:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:52,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:52,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:52,373 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) [2022-03-18 16:55:52,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 16:55:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 16:55:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 16:55:52,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 16:55:52,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918469052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:55:52,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:55:52,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-18 16:55:52,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931739669] [2022-03-18 16:55:52,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:52,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 16:55:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:52,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 16:55:52,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-18 16:55:52,703 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 16:55:53,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:53,179 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-03-18 16:55:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 16:55:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2022-03-18 16:55:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:53,180 INFO L225 Difference]: With dead ends: 64 [2022-03-18 16:55:53,180 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 16:55:53,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-03-18 16:55:53,181 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:53,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 32 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 16:55:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 16:55:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-03-18 16:55:53,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-18 16:55:53,186 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 35 [2022-03-18 16:55:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:53,186 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-18 16:55:53,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 16:55:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-18 16:55:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 16:55:53,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:53,188 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:53,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 16:55:53,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:53,396 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -444702843, now seen corresponding path program 2 times [2022-03-18 16:55:53,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831829326] [2022-03-18 16:55:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:53,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:53,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:55:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-18 16:55:53,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831829326] [2022-03-18 16:55:53,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831829326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910040945] [2022-03-18 16:55:53,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 16:55:53,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:53,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:53,544 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) [2022-03-18 16:55:53,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 16:55:53,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 16:55:53,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:55:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 16:55:53,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-18 16:55:53,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:54,080 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-18 16:55:54,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910040945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:55:54,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:55:54,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 21 [2022-03-18 16:55:54,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455729697] [2022-03-18 16:55:54,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:54,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 16:55:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 16:55:54,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-18 16:55:54,082 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 16:55:54,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:54,557 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-03-18 16:55:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 16:55:54,557 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-03-18 16:55:54,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:54,558 INFO L225 Difference]: With dead ends: 69 [2022-03-18 16:55:54,558 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 16:55:54,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 16:55:54,560 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:54,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 29 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 16:55:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 16:55:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-03-18 16:55:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-03-18 16:55:54,568 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 54 [2022-03-18 16:55:54,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:54,568 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-03-18 16:55:54,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 16:55:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-03-18 16:55:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 16:55:54,569 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:54,569 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:54,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 16:55:54,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:54,770 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash -292182650, now seen corresponding path program 3 times [2022-03-18 16:55:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:54,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478247888] [2022-03-18 16:55:54,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:54,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:54,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:54,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:55:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-18 16:55:54,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478247888] [2022-03-18 16:55:54,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478247888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:54,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734838005] [2022-03-18 16:55:54,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 16:55:54,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:54,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:54,884 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) [2022-03-18 16:55:54,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 16:55:54,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-18 16:55:54,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:55:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 16:55:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-18 16:55:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-18 16:55:55,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734838005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:55:55,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:55:55,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-18 16:55:55,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094346972] [2022-03-18 16:55:55,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:55,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 16:55:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:55,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 16:55:55,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-18 16:55:55,419 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 16:55:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:55,673 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-03-18 16:55:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 16:55:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2022-03-18 16:55:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:55,675 INFO L225 Difference]: With dead ends: 80 [2022-03-18 16:55:55,675 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 16:55:55,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2022-03-18 16:55:55,676 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:55,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 30 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 16:55:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 16:55:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-18 16:55:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-03-18 16:55:55,681 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 57 [2022-03-18 16:55:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:55,681 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-03-18 16:55:55,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 16:55:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-03-18 16:55:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 16:55:55,683 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:55,683 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:55,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 16:55:55,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:55,900 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash -582619515, now seen corresponding path program 4 times [2022-03-18 16:55:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:55,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336140975] [2022-03-18 16:55:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:55,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:55,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:55:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 16:55:56,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336140975] [2022-03-18 16:55:56,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336140975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617762670] [2022-03-18 16:55:56,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 16:55:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:56,006 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) [2022-03-18 16:55:56,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 16:55:56,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 16:55:56,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:55:56,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 16:55:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-18 16:55:56,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-18 16:55:56,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617762670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:55:56,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:55:56,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-18 16:55:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349199375] [2022-03-18 16:55:56,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:56,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 16:55:56,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:56,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 16:55:56,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-18 16:55:56,475 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 16:55:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:55:57,822 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-03-18 16:55:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 16:55:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-03-18 16:55:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:55:57,824 INFO L225 Difference]: With dead ends: 175 [2022-03-18 16:55:57,824 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 16:55:57,825 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 16:55:57,826 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 16:55:57,826 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 39 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 16:55:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 16:55:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2022-03-18 16:55:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 108 states have internal predecessors, (138), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:55:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2022-03-18 16:55:57,833 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 69 [2022-03-18 16:55:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:55:57,833 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2022-03-18 16:55:57,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 16:55:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2022-03-18 16:55:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-18 16:55:57,835 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:55:57,835 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:55:57,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 16:55:58,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:58,056 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:55:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:55:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash -551286544, now seen corresponding path program 5 times [2022-03-18 16:55:58,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:55:58,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833679932] [2022-03-18 16:55:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:55:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:55:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:55:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:58,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:55:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:55:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-18 16:55:58,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:55:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833679932] [2022-03-18 16:55:58,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833679932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102156739] [2022-03-18 16:55:58,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 16:55:58,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:55:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:55:58,528 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) [2022-03-18 16:55:58,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 16:55:58,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-18 16:55:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:55:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 16:55:58,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:55:58,752 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-18 16:55:58,752 INFO L390 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 11 treesize of output 11 [2022-03-18 16:55:58,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-18 16:55:59,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-03-18 16:55:59,568 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-18 16:55:59,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 19 treesize of output 10 [2022-03-18 16:55:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-18 16:55:59,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:55:59,760 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_320 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_320) |c_main_~#array~1.base|) |c_main_~#array~1.offset|) 0)) is different from false [2022-03-18 16:55:59,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102156739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:55:59,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 16:55:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-03-18 16:55:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327306618] [2022-03-18 16:55:59,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 16:55:59,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 16:55:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:55:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 16:55:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=961, Unknown=9, NotChecked=62, Total=1122 [2022-03-18 16:55:59,764 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:56:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:00,709 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2022-03-18 16:56:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 16:56:00,709 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 78 [2022-03-18 16:56:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:00,710 INFO L225 Difference]: With dead ends: 124 [2022-03-18 16:56:00,710 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 16:56:00,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2387, Unknown=14, NotChecked=100, Total=2756 [2022-03-18 16:56:00,712 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:00,712 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 722 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-03-18 16:56:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 16:56:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-03-18 16:56:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 16:56:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2022-03-18 16:56:00,718 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 78 [2022-03-18 16:56:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:00,718 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2022-03-18 16:56:00,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 16:56:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2022-03-18 16:56:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 16:56:00,719 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:00,720 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:00,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:00,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:00,943 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:00,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:00,944 INFO L85 PathProgramCache]: Analyzing trace with hash 215004892, now seen corresponding path program 1 times [2022-03-18 16:56:00,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046106706] [2022-03-18 16:56:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:01,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:56:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:01,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:56:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:01,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 16:56:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-18 16:56:01,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:01,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046106706] [2022-03-18 16:56:01,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046106706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:01,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81898518] [2022-03-18 16:56:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:01,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:01,496 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) [2022-03-18 16:56:01,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 16:56:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:01,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 16:56:01,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:01,668 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-18 16:56:01,668 INFO L390 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 11 treesize of output 11 [2022-03-18 16:56:01,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 16:56:01,896 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 16:56:01,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 16:56:02,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-18 16:56:04,612 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-18 16:56:04,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 21 treesize of output 10 [2022-03-18 16:56:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-18 16:56:04,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:56:04,837 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_405 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_405) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 4)) 1)) is different from false [2022-03-18 16:56:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81898518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:04,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 16:56:04,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2022-03-18 16:56:04,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541892000] [2022-03-18 16:56:04,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 16:56:04,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 16:56:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 16:56:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1420, Unknown=12, NotChecked=76, Total=1640 [2022-03-18 16:56:04,840 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 16:56:06,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:06,165 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-18 16:56:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 16:56:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 86 [2022-03-18 16:56:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:06,166 INFO L225 Difference]: With dead ends: 135 [2022-03-18 16:56:06,166 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 16:56:06,168 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=411, Invalid=3736, Unknown=17, NotChecked=126, Total=4290 [2022-03-18 16:56:06,168 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:06,168 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 201 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 641 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2022-03-18 16:56:06,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 16:56:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-18 16:56:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 119 states have internal predecessors, (148), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 16:56:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2022-03-18 16:56:06,173 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 86 [2022-03-18 16:56:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:06,174 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2022-03-18 16:56:06,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 31 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 16:56:06,174 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2022-03-18 16:56:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 16:56:06,175 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:06,175 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:06,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 16:56:06,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 16:56:06,388 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1130972984, now seen corresponding path program 2 times [2022-03-18 16:56:06,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:06,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835057446] [2022-03-18 16:56:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:06,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:06,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:56:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:06,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:56:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:07,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 16:56:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:07,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 16:56:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-18 16:56:07,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835057446] [2022-03-18 16:56:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835057446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951912729] [2022-03-18 16:56:07,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 16:56:07,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:07,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 16:56:07,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 16:56:07,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 16:56:07,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:56:07,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 16:56:07,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:07,210 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-18 16:56:07,210 INFO L390 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 11 treesize of output 11 [2022-03-18 16:56:07,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 16:56:07,391 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 16:56:07,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 16:56:07,448 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 16:56:07,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 16:56:07,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-18 16:56:08,281 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-18 16:56:08,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 21 treesize of output 10 [2022-03-18 16:56:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-18 16:56:08,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:56:08,559 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_492 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_492) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 8)))) is different from false [2022-03-18 16:56:08,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951912729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:08,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 16:56:08,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-03-18 16:56:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107926787] [2022-03-18 16:56:08,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 16:56:08,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 16:56:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 16:56:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1648, Unknown=11, NotChecked=82, Total=1892 [2022-03-18 16:56:08,562 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 16:56:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:09,837 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2022-03-18 16:56:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 16:56:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2022-03-18 16:56:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:09,838 INFO L225 Difference]: With dead ends: 140 [2022-03-18 16:56:09,838 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 16:56:09,840 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=418, Invalid=3860, Unknown=16, NotChecked=128, Total=4422 [2022-03-18 16:56:09,840 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:09,840 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 256 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 847 Invalid, 0 Unknown, 149 Unchecked, 0.4s Time] [2022-03-18 16:56:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 16:56:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-03-18 16:56:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 125 states have internal predecessors, (154), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 16:56:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-18 16:56:09,850 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 94 [2022-03-18 16:56:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:09,850 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-18 16:56:09,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 16:56:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-18 16:56:09,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 16:56:09,851 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:09,851 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:09,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:10,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:10,068 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash 971116212, now seen corresponding path program 3 times [2022-03-18 16:56:10,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:10,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546062472] [2022-03-18 16:56:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:10,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:10,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:56:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:56:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 16:56:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 16:56:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:10,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 16:56:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-18 16:56:10,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:10,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546062472] [2022-03-18 16:56:10,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546062472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:10,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594427908] [2022-03-18 16:56:10,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 16:56:10,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:10,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:10,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 16:56:10,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 16:56:10,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-18 16:56:10,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:56:10,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 16:56:10,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:11,047 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-03-18 16:56:11,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-03-18 16:56:11,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 16:56:11,223 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-18 16:56:11,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-03-18 16:56:11,277 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-18 16:56:11,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-03-18 16:56:11,396 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-18 16:56:11,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2022-03-18 16:56:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-18 16:56:11,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-03-18 16:56:12,595 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-18 16:56:12,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-03-18 16:56:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-18 16:56:12,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:56:12,922 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_581 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_581) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 12)))) is different from false [2022-03-18 16:56:12,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594427908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:12,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 16:56:12,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-03-18 16:56:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722899379] [2022-03-18 16:56:12,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 16:56:12,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 16:56:12,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:12,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 16:56:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1884, Unknown=12, NotChecked=88, Total=2162 [2022-03-18 16:56:12,924 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 16:56:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:14,545 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2022-03-18 16:56:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 16:56:14,545 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 102 [2022-03-18 16:56:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:14,546 INFO L225 Difference]: With dead ends: 149 [2022-03-18 16:56:14,546 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 16:56:14,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=519, Invalid=4724, Unknown=17, NotChecked=142, Total=5402 [2022-03-18 16:56:14,548 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:14,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 233 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 793 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-03-18 16:56:14,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 16:56:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-03-18 16:56:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 131 states have internal predecessors, (160), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 16:56:14,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2022-03-18 16:56:14,553 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 102 [2022-03-18 16:56:14,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:14,553 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2022-03-18 16:56:14,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 16:56:14,554 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2022-03-18 16:56:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 16:56:14,558 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:14,558 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:14,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:14,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 16:56:14,767 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1541490528, now seen corresponding path program 4 times [2022-03-18 16:56:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602229887] [2022-03-18 16:56:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:56:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:56:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 16:56:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 16:56:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 16:56:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 16:56:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-03-18 16:56:15,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602229887] [2022-03-18 16:56:15,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602229887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990727957] [2022-03-18 16:56:15,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 16:56:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:15,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 16:56:15,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 16:56:15,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 16:56:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:56:15,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-18 16:56:15,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:15,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 16:56:15,758 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-18 16:56:15,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-03-18 16:56:15,803 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-18 16:56:15,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-03-18 16:56:15,841 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-18 16:56:15,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-03-18 16:56:15,881 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-18 16:56:15,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-03-18 16:56:17,798 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-03-18 16:56:17,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 12 [2022-03-18 16:56:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 271 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-18 16:56:17,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 16:56:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 13 proven. 154 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-18 16:56:22,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990727957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 16:56:22,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 16:56:22,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 21] total 65 [2022-03-18 16:56:22,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686028340] [2022-03-18 16:56:22,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 16:56:22,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 16:56:22,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 16:56:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3708, Unknown=2, NotChecked=0, Total=4160 [2022-03-18 16:56:22,399 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-18 16:56:42,997 WARN L232 SmtUtils]: Spent 17.78s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 16:56:49,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:49,243 INFO L93 Difference]: Finished difference Result 483 states and 635 transitions. [2022-03-18 16:56:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 16:56:49,243 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 110 [2022-03-18 16:56:49,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:49,246 INFO L225 Difference]: With dead ends: 483 [2022-03-18 16:56:49,246 INFO L226 Difference]: Without dead ends: 483 [2022-03-18 16:56:49,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4598 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=1306, Invalid=11120, Unknown=6, NotChecked=0, Total=12432 [2022-03-18 16:56:49,249 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 214 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:49,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 187 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1742 Invalid, 0 Unknown, 1208 Unchecked, 0.7s Time] [2022-03-18 16:56:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-18 16:56:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 154. [2022-03-18 16:56:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 137 states have internal predecessors, (166), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 16:56:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-03-18 16:56:49,256 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 110 [2022-03-18 16:56:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:49,256 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-03-18 16:56:49,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-18 16:56:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-03-18 16:56:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-18 16:56:49,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 16:56:49,257 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 16:56:49,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:49,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 16:56:49,471 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 16:56:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 16:56:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash -289884532, now seen corresponding path program 5 times [2022-03-18 16:56:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 16:56:49,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419460198] [2022-03-18 16:56:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 16:56:49,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 16:56:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 16:56:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 16:56:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 16:56:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 16:56:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 16:56:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 16:56:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 16:56:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 16:56:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-18 16:56:49,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 16:56:49,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419460198] [2022-03-18 16:56:49,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419460198] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 16:56:49,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58717128] [2022-03-18 16:56:49,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 16:56:49,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 16:56:49,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 16:56:49,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 16:56:49,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 16:56:49,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-18 16:56:49,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 16:56:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 16:56:49,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 16:56:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-18 16:56:49,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 16:56:49,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58717128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 16:56:49,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 16:56:49,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-03-18 16:56:49,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354005187] [2022-03-18 16:56:49,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 16:56:49,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 16:56:49,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 16:56:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 16:56:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 16:56:49,969 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 16:56:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 16:56:50,001 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2022-03-18 16:56:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 16:56:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 118 [2022-03-18 16:56:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 16:56:50,002 INFO L225 Difference]: With dead ends: 147 [2022-03-18 16:56:50,002 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 16:56:50,002 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 16:56:50,003 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 16:56:50,003 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 16:56:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 16:56:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 16:56:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 16:56:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 16:56:50,004 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-03-18 16:56:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 16:56:50,004 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 16:56:50,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 16:56:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 16:56:50,004 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 16:56:50,007 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 16:56:50,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 16:56:50,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-18 16:56:50,226 INFO L718 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1, 1] [2022-03-18 16:56:50,227 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 16:56:50,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:56:50 BasicIcfg [2022-03-18 16:56:50,230 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 16:56:50,233 INFO L158 Benchmark]: Toolchain (without parser) took 61463.80ms. Allocated memory was 192.9MB in the beginning and 402.7MB in the end (delta: 209.7MB). Free memory was 138.2MB in the beginning and 288.3MB in the end (delta: -150.1MB). Peak memory consumption was 60.0MB. Max. memory is 8.0GB. [2022-03-18 16:56:50,233 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory was 154.4MB in the beginning and 154.3MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 16:56:50,233 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.12ms. Allocated memory is still 192.9MB. Free memory was 137.9MB in the beginning and 162.0MB in the end (delta: -24.1MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-03-18 16:56:50,234 INFO L158 Benchmark]: Boogie Preprocessor took 48.99ms. Allocated memory is still 192.9MB. Free memory was 162.0MB in the beginning and 160.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 16:56:50,234 INFO L158 Benchmark]: RCFGBuilder took 251.34ms. Allocated memory is still 192.9MB. Free memory was 160.5MB in the beginning and 149.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 16:56:50,235 INFO L158 Benchmark]: IcfgTransformer took 18.64ms. Allocated memory is still 192.9MB. Free memory was 149.0MB in the beginning and 147.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 16:56:50,235 INFO L158 Benchmark]: TraceAbstraction took 60842.93ms. Allocated memory was 192.9MB in the beginning and 402.7MB in the end (delta: 209.7MB). Free memory was 147.4MB in the beginning and 288.3MB in the end (delta: -140.9MB). Peak memory consumption was 69.8MB. Max. memory is 8.0GB. [2022-03-18 16:56:50,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 192.9MB. Free memory was 154.4MB in the beginning and 154.3MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 296.12ms. Allocated memory is still 192.9MB. Free memory was 137.9MB in the beginning and 162.0MB in the end (delta: -24.1MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 48.99ms. Allocated memory is still 192.9MB. Free memory was 162.0MB in the beginning and 160.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 251.34ms. Allocated memory is still 192.9MB. Free memory was 160.5MB in the beginning and 149.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 18.64ms. Allocated memory is still 192.9MB. Free memory was 149.0MB in the beginning and 147.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 60842.93ms. Allocated memory was 192.9MB in the beginning and 402.7MB in the end (delta: 209.7MB). Free memory was 147.4MB in the beginning and 288.3MB in the end (delta: -140.9MB). Peak memory consumption was 69.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 60.8s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 35.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1871 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1863 mSDsluCounter, 1425 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1685 IncrementalHoareTripleChecker+Unchecked, 1025 mSDsCounter, 998 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6692 IncrementalHoareTripleChecker+Invalid, 9375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 998 mSolverCounterUnsat, 400 mSDtfsCounter, 6692 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1834 GetRequests, 1190 SyntacticMatches, 68 SemanticMatches, 576 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 10003 ImplicationChecksByTransitivity, 43.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=14, InterpolantAutomatonStates: 311, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 473 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 1768 NumberOfCodeBlocks, 1761 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2109 ConstructedInterpolants, 274 QuantifiedInterpolants, 17170 SizeOfPredicates, 64 NumberOfNonLiveVariables, 3096 ConjunctsInSsa, 317 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 2788/5062 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 16:56:50,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...