/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-b030c9e [2022-03-20 03:18:41,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:18:41,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:18:41,914 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 03:18:41,914 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 03:18:41,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 03:18:41,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 03:18:41,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 03:18:41,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 03:18:41,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 03:18:41,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 03:18:41,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-20 03:18:41,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:18:41,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:18:41,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:18:41,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:18:41,972 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:18:41,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:18:41,974 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:18:41,974 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:18:41,974 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:18:41,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:18:41,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:18:41,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:18:41,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:18:41,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:18:41,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:18:41,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:18:41,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:18:41,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:18:41,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:18:41,977 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:18:41,978 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:18:42,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:18:42,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:18:42,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:18:42,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:18:42,250 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:18:42,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-03-20 03:18:42,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69e3d99ba/a75b20a30a2845949f91372abd0224f5/FLAGdca855c12 [2022-03-20 03:18:42,735 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:18:42,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-03-20 03:18:42,741 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69e3d99ba/a75b20a30a2845949f91372abd0224f5/FLAGdca855c12 [2022-03-20 03:18:42,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69e3d99ba/a75b20a30a2845949f91372abd0224f5 [2022-03-20 03:18:42,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:18:42,754 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:18:42,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:18:42,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:18:42,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:18:42,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:42" (1/1) ... [2022-03-20 03:18:42,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2462210e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:42, skipping insertion in model container [2022-03-20 03:18:42,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:42" (1/1) ... [2022-03-20 03:18:42,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:18:42,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:18:42,929 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] [2022-03-20 03:18:42,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:18:42,961 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:18:42,973 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] [2022-03-20 03:18:42,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:18:43,008 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:18:43,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43 WrapperNode [2022-03-20 03:18:43,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:18:43,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:18:43,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:18:43,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:18:43,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:18:43,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:18:43,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:18:43,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:18:43,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:18:43,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:43,100 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) [2022-03-20 03:18:43,126 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 [2022-03-20 03:18:43,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:18:43,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:18:43,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:18:43,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:18:43,143 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-03-20 03:18:43,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:18:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:18:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:18:43,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:18:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:18:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:18:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:18:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:18:43,144 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-03-20 03:18:43,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:18:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:18:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:18:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 03:18:43,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:18:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:18:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:18:43,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:18:43,237 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:18:43,239 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:18:43,389 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:18:43,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:18:43,395 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 03:18:43,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:43 BoogieIcfgContainer [2022-03-20 03:18:43,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:18:43,397 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:18:43,397 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:18:43,412 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:18:43,415 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:43" (1/1) ... [2022-03-20 03:18:43,417 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:18:43,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:18:43 BasicIcfg [2022-03-20 03:18:43,430 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:18:43,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:18:43,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:18:43,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:18:43,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:18:42" (1/4) ... [2022-03-20 03:18:43,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472ffb9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:43, skipping insertion in model container [2022-03-20 03:18:43,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:43" (2/4) ... [2022-03-20 03:18:43,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472ffb9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:43, skipping insertion in model container [2022-03-20 03:18:43,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:43" (3/4) ... [2022-03-20 03:18:43,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@472ffb9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:18:43, skipping insertion in model container [2022-03-20 03:18:43,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:18:43" (4/4) ... [2022-03-20 03:18:43,437 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.iJordan [2022-03-20 03:18:43,441 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:18:43,441 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:18:43,475 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:18:43,480 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 [2022-03-20 03:18:43,480 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:18:43,491 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) [2022-03-20 03:18:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 03:18:43,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:43,498 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:43,498 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1326105583, now seen corresponding path program 1 times [2022-03-20 03:18:43,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475987909] [2022-03-20 03:18:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:43,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:43,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 03:18:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:43,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475987909] [2022-03-20 03:18:43,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475987909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:43,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:43,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 03:18:43,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415709038] [2022-03-20 03:18:43,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:43,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 03:18:43,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 03:18:43,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 03:18:43,828 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) [2022-03-20 03:18:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:43,978 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-03-20 03:18:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 03:18:43,980 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 [2022-03-20 03:18:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:43,995 INFO L225 Difference]: With dead ends: 51 [2022-03-20 03:18:43,995 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 03:18:43,997 INFO L912 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 [2022-03-20 03:18:44,001 INFO L913 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 [2022-03-20 03:18:44,002 INFO L914 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] [2022-03-20 03:18:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 03:18:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-03-20 03:18:44,043 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) [2022-03-20 03:18:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-20 03:18:44,045 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-03-20 03:18:44,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:44,045 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-20 03:18:44,046 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) [2022-03-20 03:18:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-20 03:18:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 03:18:44,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:44,046 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:44,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:18:44,047 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:44,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:44,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489969, now seen corresponding path program 1 times [2022-03-20 03:18:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:44,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438608326] [2022-03-20 03:18:44,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:44,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-20 03:18:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:44,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438608326] [2022-03-20 03:18:44,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438608326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:44,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:44,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 03:18:44,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006250768] [2022-03-20 03:18:44,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:44,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 03:18:44,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 03:18:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 03:18:44,148 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) [2022-03-20 03:18:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:44,284 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-20 03:18:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 03:18:44,284 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 [2022-03-20 03:18:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:44,287 INFO L225 Difference]: With dead ends: 38 [2022-03-20 03:18:44,287 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 03:18:44,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:18:44,292 INFO L913 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 [2022-03-20 03:18:44,292 INFO L914 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] [2022-03-20 03:18:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 03:18:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-20 03:18:44,304 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) [2022-03-20 03:18:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 03:18:44,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-03-20 03:18:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:44,305 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 03:18:44,305 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) [2022-03-20 03:18:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 03:18:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 03:18:44,306 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:44,306 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:44,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:18:44,306 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 43929779, now seen corresponding path program 1 times [2022-03-20 03:18:44,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:44,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239939250] [2022-03-20 03:18:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:44,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-20 03:18:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:44,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239939250] [2022-03-20 03:18:44,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239939250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321620884] [2022-03-20 03:18:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:44,399 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) [2022-03-20 03:18:44,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:18:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 03:18:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:44,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:18:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321620884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:44,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:44,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-03-20 03:18:44,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459629693] [2022-03-20 03:18:44,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:44,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:18:44,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:44,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:18:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:18:44,661 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) [2022-03-20 03:18:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:44,844 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-03-20 03:18:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 03:18:44,845 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 [2022-03-20 03:18:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:44,846 INFO L225 Difference]: With dead ends: 47 [2022-03-20 03:18:44,846 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 03:18:44,846 INFO L912 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 [2022-03-20 03:18:44,847 INFO L913 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 [2022-03-20 03:18:44,853 INFO L914 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] [2022-03-20 03:18:44,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 03:18:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-03-20 03:18:44,863 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) [2022-03-20 03:18:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-20 03:18:44,865 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-03-20 03:18:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:44,867 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-20 03:18:44,867 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) [2022-03-20 03:18:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-20 03:18:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 03:18:44,868 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:44,868 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:18:44,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:45,086 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 [2022-03-20 03:18:45,087 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash -969564551, now seen corresponding path program 2 times [2022-03-20 03:18:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153918572] [2022-03-20 03:18:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 03:18:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:18:45,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:45,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153918572] [2022-03-20 03:18:45,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153918572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:18:45,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:18:45,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:18:45,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079374230] [2022-03-20 03:18:45,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:18:45,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 03:18:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 03:18:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 03:18:45,205 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) [2022-03-20 03:18:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:45,415 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-03-20 03:18:45,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 03:18:45,416 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 [2022-03-20 03:18:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:45,417 INFO L225 Difference]: With dead ends: 42 [2022-03-20 03:18:45,417 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 03:18:45,417 INFO L912 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 [2022-03-20 03:18:45,418 INFO L913 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 [2022-03-20 03:18:45,418 INFO L914 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] [2022-03-20 03:18:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 03:18:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-03-20 03:18:45,421 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) [2022-03-20 03:18:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-20 03:18:45,422 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-03-20 03:18:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:45,422 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-20 03:18:45,423 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) [2022-03-20 03:18:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-20 03:18:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 03:18:45,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:45,423 INFO L499 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] [2022-03-20 03:18:45,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 03:18:45,424 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1845213134, now seen corresponding path program 1 times [2022-03-20 03:18:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:45,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482998236] [2022-03-20 03:18:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-20 03:18:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 03:18:45,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:45,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482998236] [2022-03-20 03:18:45,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482998236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:45,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892990978] [2022-03-20 03:18:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:45,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:45,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:45,516 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) [2022-03-20 03:18:45,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:18:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 03:18:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:18:45,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:18:45,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892990978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:45,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:45,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-20 03:18:45,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159845940] [2022-03-20 03:18:45,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:45,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 03:18:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 03:18:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 03:18:45,760 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) [2022-03-20 03:18:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:46,172 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-20 03:18:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 03:18:46,173 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 [2022-03-20 03:18:46,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:46,176 INFO L225 Difference]: With dead ends: 63 [2022-03-20 03:18:46,176 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 03:18:46,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-03-20 03:18:46,177 INFO L913 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 [2022-03-20 03:18:46,178 INFO L914 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] [2022-03-20 03:18:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 03:18:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-03-20 03:18:46,182 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) [2022-03-20 03:18:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-20 03:18:46,182 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2022-03-20 03:18:46,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:46,183 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-20 03:18:46,183 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) [2022-03-20 03:18:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-20 03:18:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 03:18:46,184 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:46,184 INFO L499 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] [2022-03-20 03:18:46,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 03:18:46,399 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 [2022-03-20 03:18:46,400 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1453502491, now seen corresponding path program 1 times [2022-03-20 03:18:46,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095213534] [2022-03-20 03:18:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:46,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:46,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:18:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 03:18:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095213534] [2022-03-20 03:18:46,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095213534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958391236] [2022-03-20 03:18:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:46,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:46,515 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) [2022-03-20 03:18:46,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:18:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:46,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 03:18:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 03:18:46,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 03:18:46,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958391236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:46,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:46,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-20 03:18:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637256582] [2022-03-20 03:18:46,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:46,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 03:18:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 03:18:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-20 03:18:46,865 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) [2022-03-20 03:18:47,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:47,319 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-03-20 03:18:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 03:18:47,320 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 [2022-03-20 03:18:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:47,320 INFO L225 Difference]: With dead ends: 64 [2022-03-20 03:18:47,321 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 03:18:47,321 INFO L912 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 [2022-03-20 03:18:47,322 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 03:18:47,322 INFO L914 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] [2022-03-20 03:18:47,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 03:18:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-03-20 03:18:47,325 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) [2022-03-20 03:18:47,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-20 03:18:47,326 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 35 [2022-03-20 03:18:47,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:47,326 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-20 03:18:47,327 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) [2022-03-20 03:18:47,327 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-20 03:18:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 03:18:47,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:47,328 INFO L499 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] [2022-03-20 03:18:47,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:47,528 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 [2022-03-20 03:18:47,529 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -444702843, now seen corresponding path program 2 times [2022-03-20 03:18:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867016532] [2022-03-20 03:18:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:47,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:18:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 03:18:47,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:47,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867016532] [2022-03-20 03:18:47,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867016532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:47,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66360653] [2022-03-20 03:18:47,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:18:47,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:47,698 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) [2022-03-20 03:18:47,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 03:18:47,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:18:47,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:18:47,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 03:18:47,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 03:18:47,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 03:18:48,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66360653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:48,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:48,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 21 [2022-03-20 03:18:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525022113] [2022-03-20 03:18:48,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:48,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 03:18:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 03:18:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:18:48,264 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) [2022-03-20 03:18:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:48,735 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-03-20 03:18:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 03:18:48,736 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 [2022-03-20 03:18:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:48,737 INFO L225 Difference]: With dead ends: 69 [2022-03-20 03:18:48,737 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 03:18:48,738 INFO L912 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 [2022-03-20 03:18:48,738 INFO L913 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 [2022-03-20 03:18:48,738 INFO L914 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] [2022-03-20 03:18:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 03:18:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-03-20 03:18:48,742 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) [2022-03-20 03:18:48,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-03-20 03:18:48,743 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 54 [2022-03-20 03:18:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:48,743 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-03-20 03:18:48,743 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) [2022-03-20 03:18:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-03-20 03:18:48,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 03:18:48,744 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:48,744 INFO L499 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] [2022-03-20 03:18:48,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:48,958 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 [2022-03-20 03:18:48,959 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:48,959 INFO L85 PathProgramCache]: Analyzing trace with hash -292182650, now seen corresponding path program 3 times [2022-03-20 03:18:48,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:48,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893569892] [2022-03-20 03:18:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:48,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:18:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-20 03:18:49,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893569892] [2022-03-20 03:18:49,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893569892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:49,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943974767] [2022-03-20 03:18:49,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:18:49,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:49,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:49,098 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) [2022-03-20 03:18:49,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 03:18:49,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-20 03:18:49,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:18:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 03:18:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-20 03:18:49,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-20 03:18:49,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943974767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:49,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:49,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-20 03:18:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252901863] [2022-03-20 03:18:49,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:49,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 03:18:49,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 03:18:49,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-20 03:18:49,621 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) [2022-03-20 03:18:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:49,869 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-03-20 03:18:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 03:18:49,869 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 [2022-03-20 03:18:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:49,870 INFO L225 Difference]: With dead ends: 80 [2022-03-20 03:18:49,870 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 03:18:49,871 INFO L912 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 [2022-03-20 03:18:49,871 INFO L913 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 [2022-03-20 03:18:49,871 INFO L914 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] [2022-03-20 03:18:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 03:18:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-20 03:18:49,875 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) [2022-03-20 03:18:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-03-20 03:18:49,876 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 57 [2022-03-20 03:18:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:49,876 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-03-20 03:18:49,876 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) [2022-03-20 03:18:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-03-20 03:18:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 03:18:49,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:49,877 INFO L499 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] [2022-03-20 03:18:49,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:50,078 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 [2022-03-20 03:18:50,078 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash -582619515, now seen corresponding path program 4 times [2022-03-20 03:18:50,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:50,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314170218] [2022-03-20 03:18:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:50,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:50,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:18:50,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 03:18:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314170218] [2022-03-20 03:18:50,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314170218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:50,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941104056] [2022-03-20 03:18:50,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:18:50,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:50,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:50,223 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) [2022-03-20 03:18:50,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 03:18:50,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:18:50,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:18:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 03:18:50,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 03:18:50,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-20 03:18:50,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941104056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:18:50,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:18:50,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-20 03:18:50,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279817453] [2022-03-20 03:18:50,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:50,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 03:18:50,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 03:18:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:18:50,649 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) [2022-03-20 03:18:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:52,068 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-03-20 03:18:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 03:18:52,069 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 [2022-03-20 03:18:52,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:52,070 INFO L225 Difference]: With dead ends: 175 [2022-03-20 03:18:52,070 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 03:18:52,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 03:18:52,072 INFO L913 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 [2022-03-20 03:18:52,072 INFO L914 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] [2022-03-20 03:18:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 03:18:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2022-03-20 03:18:52,087 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) [2022-03-20 03:18:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2022-03-20 03:18:52,088 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 69 [2022-03-20 03:18:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:52,089 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2022-03-20 03:18:52,089 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) [2022-03-20 03:18:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2022-03-20 03:18:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 03:18:52,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:52,090 INFO L499 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] [2022-03-20 03:18:52,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:52,291 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 [2022-03-20 03:18:52,291 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash -551286544, now seen corresponding path program 5 times [2022-03-20 03:18:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:52,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183306441] [2022-03-20 03:18:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:52,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:52,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:18:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 03:18:52,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:52,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183306441] [2022-03-20 03:18:52,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183306441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:52,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976020282] [2022-03-20 03:18:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:18:52,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:52,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:52,718 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) [2022-03-20 03:18:52,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 03:18:52,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 03:18:52,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:18:52,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 03:18:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:52,969 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 03:18:52,970 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 [2022-03-20 03:18:53,124 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 [2022-03-20 03:18:53,657 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 [2022-03-20 03:18:53,727 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-20 03:18:53,728 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 [2022-03-20 03:18:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 03:18:53,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:53,916 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 [2022-03-20 03:18:53,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976020282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:53,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:18:53,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-03-20 03:18:53,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354832424] [2022-03-20 03:18:53,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:53,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 03:18:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:53,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 03:18:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=961, Unknown=9, NotChecked=62, Total=1122 [2022-03-20 03:18:53,921 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) [2022-03-20 03:18:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:18:54,946 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2022-03-20 03:18:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 03:18:54,947 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 [2022-03-20 03:18:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:18:54,948 INFO L225 Difference]: With dead ends: 124 [2022-03-20 03:18:54,949 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 03:18:54,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=255, Invalid=2387, Unknown=14, NotChecked=100, Total=2756 [2022-03-20 03:18:54,950 INFO L913 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 03:18:54,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 722 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-03-20 03:18:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 03:18:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-03-20 03:18:54,966 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) [2022-03-20 03:18:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2022-03-20 03:18:54,967 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 78 [2022-03-20 03:18:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:18:54,968 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2022-03-20 03:18:54,968 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) [2022-03-20 03:18:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2022-03-20 03:18:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 03:18:54,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:18:54,970 INFO L499 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] [2022-03-20 03:18:54,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 03:18:55,170 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 [2022-03-20 03:18:55,170 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:18:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:18:55,171 INFO L85 PathProgramCache]: Analyzing trace with hash 215004892, now seen corresponding path program 1 times [2022-03-20 03:18:55,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:18:55,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634773807] [2022-03-20 03:18:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:55,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:18:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:18:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:18:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 03:18:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 03:18:55,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:18:55,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634773807] [2022-03-20 03:18:55,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634773807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:55,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465197793] [2022-03-20 03:18:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:18:55,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:18:55,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:18:55,752 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) [2022-03-20 03:18:55,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 03:18:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:18:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 03:18:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:18:55,895 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 03:18:55,895 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 [2022-03-20 03:18:56,007 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 [2022-03-20 03:18:56,083 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:18:56,084 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 [2022-03-20 03:18:56,589 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 [2022-03-20 03:18:58,833 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 03:18:58,834 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 [2022-03-20 03:18:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 03:18:58,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:18:59,060 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 [2022-03-20 03:18:59,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465197793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:18:59,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:18:59,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2022-03-20 03:18:59,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639301396] [2022-03-20 03:18:59,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:18:59,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 03:18:59,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:18:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 03:18:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1420, Unknown=12, NotChecked=76, Total=1640 [2022-03-20 03:18:59,063 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) [2022-03-20 03:19:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:00,415 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-20 03:19:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 03:19:00,416 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 [2022-03-20 03:19:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:00,417 INFO L225 Difference]: With dead ends: 135 [2022-03-20 03:19:00,417 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 03:19:00,418 INFO L912 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 [2022-03-20 03:19:00,419 INFO L913 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 [2022-03-20 03:19:00,419 INFO L914 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] [2022-03-20 03:19:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 03:19:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-20 03:19:00,422 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) [2022-03-20 03:19:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2022-03-20 03:19:00,423 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 86 [2022-03-20 03:19:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:00,423 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2022-03-20 03:19:00,424 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) [2022-03-20 03:19:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2022-03-20 03:19:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 03:19:00,425 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:00,425 INFO L499 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] [2022-03-20 03:19:00,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:00,639 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 [2022-03-20 03:19:00,640 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:00,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1130972984, now seen corresponding path program 2 times [2022-03-20 03:19:00,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:00,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352904065] [2022-03-20 03:19:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:00,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:01,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:01,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:19:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 03:19:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:19:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-20 03:19:01,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352904065] [2022-03-20 03:19:01,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352904065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523482001] [2022-03-20 03:19:01,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:19:01,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:01,228 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) [2022-03-20 03:19:01,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 03:19:01,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:19:01,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:01,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 03:19:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:01,383 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-20 03:19:01,383 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 [2022-03-20 03:19:01,469 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 [2022-03-20 03:19:01,542 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:19:01,542 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 [2022-03-20 03:19:01,601 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:19:01,601 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 [2022-03-20 03:19:02,047 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 [2022-03-20 03:19:02,426 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 03:19:02,426 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 [2022-03-20 03:19:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-20 03:19:02,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:02,699 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 [2022-03-20 03:19:02,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523482001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:02,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:19:02,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-03-20 03:19:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500500017] [2022-03-20 03:19:02,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:02,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 03:19:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 03:19:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1648, Unknown=11, NotChecked=82, Total=1892 [2022-03-20 03:19:02,701 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) [2022-03-20 03:19:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:03,947 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2022-03-20 03:19:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 03:19:03,948 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 [2022-03-20 03:19:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:03,949 INFO L225 Difference]: With dead ends: 140 [2022-03-20 03:19:03,949 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 03:19:03,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=418, Invalid=3860, Unknown=16, NotChecked=128, Total=4422 [2022-03-20 03:19:03,950 INFO L913 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 [2022-03-20 03:19:03,951 INFO L914 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] [2022-03-20 03:19:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 03:19:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-03-20 03:19:03,954 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) [2022-03-20 03:19:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-20 03:19:03,955 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 94 [2022-03-20 03:19:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:03,955 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-20 03:19:03,956 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) [2022-03-20 03:19:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-20 03:19:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 03:19:03,957 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:03,957 INFO L499 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] [2022-03-20 03:19:03,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:04,185 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 [2022-03-20 03:19:04,186 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:04,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:04,186 INFO L85 PathProgramCache]: Analyzing trace with hash 971116212, now seen corresponding path program 3 times [2022-03-20 03:19:04,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752086393] [2022-03-20 03:19:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:04,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:04,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:04,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:19:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:04,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 03:19:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:04,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:19:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:04,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 03:19:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 03:19:04,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:04,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752086393] [2022-03-20 03:19:04,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752086393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537803779] [2022-03-20 03:19:04,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 03:19:04,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:04,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:04,832 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) [2022-03-20 03:19:04,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 03:19:05,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-20 03:19:05,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:05,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 03:19:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:05,139 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-03-20 03:19:05,139 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 [2022-03-20 03:19:05,216 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 [2022-03-20 03:19:05,317 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-20 03:19:05,317 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 [2022-03-20 03:19:05,378 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 03:19:05,378 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 [2022-03-20 03:19:05,498 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-20 03:19:05,499 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 [2022-03-20 03:19:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-20 03:19:06,046 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 [2022-03-20 03:19:06,776 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-20 03:19:06,777 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 [2022-03-20 03:19:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-20 03:19:06,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:07,115 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 [2022-03-20 03:19:07,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537803779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:07,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 03:19:07,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-03-20 03:19:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094650940] [2022-03-20 03:19:07,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:07,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 03:19:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 03:19:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1884, Unknown=12, NotChecked=88, Total=2162 [2022-03-20 03:19:07,118 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) [2022-03-20 03:19:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:08,839 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2022-03-20 03:19:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 03:19:08,839 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 [2022-03-20 03:19:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:08,840 INFO L225 Difference]: With dead ends: 149 [2022-03-20 03:19:08,840 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 03:19:08,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=519, Invalid=4724, Unknown=17, NotChecked=142, Total=5402 [2022-03-20 03:19:08,842 INFO L913 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 [2022-03-20 03:19:08,842 INFO L914 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] [2022-03-20 03:19:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 03:19:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-03-20 03:19:08,845 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) [2022-03-20 03:19:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2022-03-20 03:19:08,846 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 102 [2022-03-20 03:19:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:08,846 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2022-03-20 03:19:08,847 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) [2022-03-20 03:19:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2022-03-20 03:19:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 03:19:08,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:08,848 INFO L499 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] [2022-03-20 03:19:08,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:09,063 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 [2022-03-20 03:19:09,064 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1541490528, now seen corresponding path program 4 times [2022-03-20 03:19:09,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:09,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079390278] [2022-03-20 03:19:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:09,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:19:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 03:19:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:19:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 03:19:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 03:19:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-03-20 03:19:09,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079390278] [2022-03-20 03:19:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079390278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067107294] [2022-03-20 03:19:09,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 03:19:09,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:09,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:09,908 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) [2022-03-20 03:19:09,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 03:19:10,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 03:19:10,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:10,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-20 03:19:10,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:10,046 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 [2022-03-20 03:19:10,093 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 03:19:10,097 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 [2022-03-20 03:19:10,130 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 03:19:10,131 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 [2022-03-20 03:19:10,167 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 03:19:10,167 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 [2022-03-20 03:19:10,229 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-20 03:19:10,229 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 [2022-03-20 03:19:12,207 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-03-20 03:19:12,207 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 [2022-03-20 03:19:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 271 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 03:19:12,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:19:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 13 proven. 52 refuted. 102 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-20 03:19:16,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067107294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:19:16,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:19:16,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 21] total 65 [2022-03-20 03:19:16,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712633155] [2022-03-20 03:19:16,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:19:16,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 03:19:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:16,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 03:19:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=3707, Unknown=2, NotChecked=0, Total=4160 [2022-03-20 03:19:16,730 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) [2022-03-20 03:19:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:22,329 INFO L93 Difference]: Finished difference Result 483 states and 635 transitions. [2022-03-20 03:19:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 03:19:22,329 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 [2022-03-20 03:19:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:22,332 INFO L225 Difference]: With dead ends: 483 [2022-03-20 03:19:22,332 INFO L226 Difference]: Without dead ends: 483 [2022-03-20 03:19:22,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4612 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1307, Invalid=11119, Unknown=6, NotChecked=0, Total=12432 [2022-03-20 03:19:22,335 INFO L913 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 [2022-03-20 03:19:22,336 INFO L914 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] [2022-03-20 03:19:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-20 03:19:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 154. [2022-03-20 03:19:22,342 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) [2022-03-20 03:19:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-03-20 03:19:22,343 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 110 [2022-03-20 03:19:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:22,343 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-03-20 03:19:22,343 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) [2022-03-20 03:19:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-03-20 03:19:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 03:19:22,344 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:22,345 INFO L499 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] [2022-03-20 03:19:22,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-20 03:19:22,555 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 [2022-03-20 03:19:22,555 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:22,556 INFO L85 PathProgramCache]: Analyzing trace with hash -289884532, now seen corresponding path program 5 times [2022-03-20 03:19:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91595417] [2022-03-20 03:19:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 03:19:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-20 03:19:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-20 03:19:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-20 03:19:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-20 03:19:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-20 03:19:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-20 03:19:22,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:22,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91595417] [2022-03-20 03:19:22,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91595417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:19:22,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981700665] [2022-03-20 03:19:22,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 03:19:22,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:19:22,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:22,674 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) [2022-03-20 03:19:22,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 03:19:22,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-20 03:19:22,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:19:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 03:19:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:19:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-20 03:19:23,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 03:19:23,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981700665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:19:23,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 03:19:23,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-03-20 03:19:23,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793967138] [2022-03-20 03:19:23,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:19:23,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 03:19:23,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 03:19:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-20 03:19:23,080 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) [2022-03-20 03:19:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:23,116 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2022-03-20 03:19:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 03:19:23,116 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 [2022-03-20 03:19:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:23,117 INFO L225 Difference]: With dead ends: 147 [2022-03-20 03:19:23,117 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 03:19:23,117 INFO L912 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 [2022-03-20 03:19:23,117 INFO L913 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 [2022-03-20 03:19:23,118 INFO L914 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] [2022-03-20 03:19:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 03:19:23,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 03:19:23,118 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) [2022-03-20 03:19:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 03:19:23,118 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-03-20 03:19:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:23,118 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 03:19:23,119 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) [2022-03-20 03:19:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 03:19:23,119 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 03:19:23,121 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 03:19:23,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 03:19:23,339 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 [2022-03-20 03:19:23,342 INFO L719 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1, 1] [2022-03-20 03:19:23,343 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 03:19:23,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:19:23 BasicIcfg [2022-03-20 03:19:23,346 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 03:19:23,347 INFO L158 Benchmark]: Toolchain (without parser) took 40592.77ms. Allocated memory was 184.5MB in the beginning and 292.6MB in the end (delta: 108.0MB). Free memory was 125.1MB in the beginning and 123.7MB in the end (delta: 1.4MB). Peak memory consumption was 111.2MB. Max. memory is 8.0GB. [2022-03-20 03:19:23,347 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 141.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 03:19:23,348 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.07ms. Allocated memory was 184.5MB in the beginning and 243.3MB in the end (delta: 58.7MB). Free memory was 125.0MB in the beginning and 214.5MB in the end (delta: -89.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-20 03:19:23,348 INFO L158 Benchmark]: Boogie Preprocessor took 45.48ms. Allocated memory is still 243.3MB. Free memory was 214.5MB in the beginning and 212.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 03:19:23,348 INFO L158 Benchmark]: RCFGBuilder took 339.83ms. Allocated memory is still 243.3MB. Free memory was 212.4MB in the beginning and 200.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-20 03:19:23,348 INFO L158 Benchmark]: IcfgTransformer took 33.12ms. Allocated memory is still 243.3MB. Free memory was 200.3MB in the beginning and 198.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 03:19:23,349 INFO L158 Benchmark]: TraceAbstraction took 39914.92ms. Allocated memory was 243.3MB in the beginning and 292.6MB in the end (delta: 49.3MB). Free memory was 198.2MB in the beginning and 123.7MB in the end (delta: 74.5MB). Peak memory consumption was 125.4MB. Max. memory is 8.0GB. [2022-03-20 03:19:23,350 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 184.5MB. Free memory is still 141.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 254.07ms. Allocated memory was 184.5MB in the beginning and 243.3MB in the end (delta: 58.7MB). Free memory was 125.0MB in the beginning and 214.5MB in the end (delta: -89.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.48ms. Allocated memory is still 243.3MB. Free memory was 214.5MB in the beginning and 212.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 339.83ms. Allocated memory is still 243.3MB. Free memory was 212.4MB in the beginning and 200.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 33.12ms. Allocated memory is still 243.3MB. Free memory was 200.3MB in the beginning and 198.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 39914.92ms. Allocated memory was 243.3MB in the beginning and 292.6MB in the end (delta: 49.3MB). Free memory was 198.2MB in the beginning and 123.7MB in the end (delta: 74.5MB). Peak memory consumption was 125.4MB. 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: 39.9s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 14.8s, 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, 10017 ImplicationChecksByTransitivity, 22.3s 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, 20.0s 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! [2022-03-20 03:19:23,408 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...