/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-7968f31 [2022-03-17 14:40:02,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:40:02,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:40:02,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 14:40:02,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:40:02,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:40:02,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:40:02,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:40:02,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:40:02,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:40:02,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:40:02,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:40:02,058 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:40:02,064 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:40:02,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:40:02,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:40:02,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:40:02,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 14:40:02,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:40:02,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:40:02,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:40:02,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:40:02,087 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:40:02,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:40:02,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:40:02,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:40:02,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:40:02,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:40:02,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:40:02,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:40:02,091 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:40:02,091 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:40:02,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:40:02,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:40:02,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:40:02,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:40:02,289 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:40:02,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-03-17 14:40:02,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317d28669/09851f95cfdc451c80d2262ef63a1936/FLAGd5de962ce [2022-03-17 14:40:02,670 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:40:02,671 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-03-17 14:40:02,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317d28669/09851f95cfdc451c80d2262ef63a1936/FLAGd5de962ce [2022-03-17 14:40:03,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/317d28669/09851f95cfdc451c80d2262ef63a1936 [2022-03-17 14:40:03,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:40:03,104 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:40:03,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:40:03,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:40:03,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:40:03,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12374cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,122 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:40:03,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:40:03,324 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] [2022-03-17 14:40:03,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:40:03,350 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:40:03,362 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] [2022-03-17 14:40:03,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:40:03,391 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:40:03,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03 WrapperNode [2022-03-17 14:40:03,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:40:03,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:40:03,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:40:03,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:40:03,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:40:03,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:40:03,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:40:03,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:40:03,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:40:03,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:03,447 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) [2022-03-17 14:40:03,467 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 [2022-03-17 14:40:03,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:40:03,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:40:03,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:40:03,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:40:03,486 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-03-17 14:40:03,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:40:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:40:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:40:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:40:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:40:03,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 14:40:03,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:40:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:40:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:40:03,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:40:03,541 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:40:03,542 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:40:03,705 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:40:03,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:40:03,716 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-17 14:40:03,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:03 BoogieIcfgContainer [2022-03-17 14:40:03,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:40:03,719 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:40:03,719 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:40:03,720 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:40:03,729 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:03" (1/1) ... [2022-03-17 14:40:03,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:40:03 BasicIcfg [2022-03-17 14:40:03,745 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:40:03,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:40:03,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:40:03,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:40:03,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:40:03" (1/4) ... [2022-03-17 14:40:03,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeadd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:40:03" (2/4) ... [2022-03-17 14:40:03,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeadd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:40:03" (3/4) ... [2022-03-17 14:40:03,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aeadd80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:40:03, skipping insertion in model container [2022-03-17 14:40:03,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:40:03" (4/4) ... [2022-03-17 14:40:03,751 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.iJordan [2022-03-17 14:40:03,756 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:40:03,756 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:40:03,789 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:40:03,794 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 [2022-03-17 14:40:03,794 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:40:03,803 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) [2022-03-17 14:40:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 14:40:03,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:03,809 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:03,809 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1326105583, now seen corresponding path program 1 times [2022-03-17 14:40:03,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191840986] [2022-03-17 14:40:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:03,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 14:40:03,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:03,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:03,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191840986] [2022-03-17 14:40:03,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191840986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:03,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:03,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 14:40:03,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066123944] [2022-03-17 14:40:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:03,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 14:40:03,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:04,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 14:40:04,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 14:40:04,003 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) [2022-03-17 14:40:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:04,121 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-03-17 14:40:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 14:40:04,123 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 [2022-03-17 14:40:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:04,132 INFO L225 Difference]: With dead ends: 51 [2022-03-17 14:40:04,132 INFO L226 Difference]: Without dead ends: 43 [2022-03-17 14:40:04,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 14:40:04,140 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:04,142 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-17 14:40:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-03-17 14:40:04,173 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) [2022-03-17 14:40:04,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-03-17 14:40:04,175 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-03-17 14:40:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:04,175 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-03-17 14:40:04,176 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) [2022-03-17 14:40:04,176 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-03-17 14:40:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-17 14:40:04,177 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:04,177 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:04,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:40:04,178 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489969, now seen corresponding path program 1 times [2022-03-17 14:40:04,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:04,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006139300] [2022-03-17 14:40:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-03-17 14:40:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:04,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006139300] [2022-03-17 14:40:04,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006139300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:04,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:04,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 14:40:04,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495094506] [2022-03-17 14:40:04,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:04,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 14:40:04,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 14:40:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 14:40:04,323 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) [2022-03-17 14:40:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:04,487 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-03-17 14:40:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 14:40:04,488 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 [2022-03-17 14:40:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:04,490 INFO L225 Difference]: With dead ends: 38 [2022-03-17 14:40:04,490 INFO L226 Difference]: Without dead ends: 38 [2022-03-17 14:40:04,505 INFO L911 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 [2022-03-17 14:40:04,506 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:04,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-17 14:40:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-17 14:40:04,511 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) [2022-03-17 14:40:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-17 14:40:04,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-03-17 14:40:04,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:04,524 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-17 14:40:04,525 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) [2022-03-17 14:40:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-17 14:40:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 14:40:04,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:04,526 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:04,526 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:40:04,526 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 43929779, now seen corresponding path program 1 times [2022-03-17 14:40:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:04,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350297265] [2022-03-17 14:40:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 14:40:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:04,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350297265] [2022-03-17 14:40:04,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350297265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:04,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899627996] [2022-03-17 14:40:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:04,643 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) [2022-03-17 14:40:04,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:40:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 14:40:04,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:04,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:40:04,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899627996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:04,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:04,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-03-17 14:40:04,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252603147] [2022-03-17 14:40:04,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:04,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 14:40:04,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 14:40:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-03-17 14:40:04,860 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) [2022-03-17 14:40:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:05,051 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-03-17 14:40:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 14:40:05,051 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 [2022-03-17 14:40:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:05,054 INFO L225 Difference]: With dead ends: 47 [2022-03-17 14:40:05,054 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 14:40:05,055 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-03-17 14:40:05,057 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:05,061 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 14:40:05,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-03-17 14:40:05,073 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) [2022-03-17 14:40:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-17 14:40:05,074 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-03-17 14:40:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:05,075 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-17 14:40:05,076 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) [2022-03-17 14:40:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-17 14:40:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 14:40:05,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:05,078 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:05,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:05,291 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 [2022-03-17 14:40:05,292 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -969564551, now seen corresponding path program 2 times [2022-03-17 14:40:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:05,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556503338] [2022-03-17 14:40:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:05,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 14:40:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:40:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:05,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556503338] [2022-03-17 14:40:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556503338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:40:05,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:40:05,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 14:40:05,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188675298] [2022-03-17 14:40:05,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:40:05,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 14:40:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 14:40:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-17 14:40:05,419 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) [2022-03-17 14:40:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:05,597 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-03-17 14:40:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 14:40:05,598 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 [2022-03-17 14:40:05,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:05,598 INFO L225 Difference]: With dead ends: 42 [2022-03-17 14:40:05,599 INFO L226 Difference]: Without dead ends: 42 [2022-03-17 14:40:05,599 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-17 14:40:05,600 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:05,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-17 14:40:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-03-17 14:40:05,603 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) [2022-03-17 14:40:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-17 14:40:05,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-03-17 14:40:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:05,604 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-17 14:40:05,604 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) [2022-03-17 14:40:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-17 14:40:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 14:40:05,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:05,605 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:05,606 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 14:40:05,606 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:05,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:05,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1845213134, now seen corresponding path program 1 times [2022-03-17 14:40:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:05,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816116928] [2022-03-17 14:40:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:05,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-17 14:40:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:40:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816116928] [2022-03-17 14:40:05,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816116928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:05,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702515973] [2022-03-17 14:40:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:05,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:05,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:05,692 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) [2022-03-17 14:40:05,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:40:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:05,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 14:40:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:40:05,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 14:40:05,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702515973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:05,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:05,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-17 14:40:05,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314713371] [2022-03-17 14:40:05,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:05,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 14:40:05,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 14:40:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-17 14:40:05,923 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) [2022-03-17 14:40:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:06,331 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-03-17 14:40:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 14:40:06,331 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 [2022-03-17 14:40:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:06,332 INFO L225 Difference]: With dead ends: 63 [2022-03-17 14:40:06,332 INFO L226 Difference]: Without dead ends: 63 [2022-03-17 14:40:06,333 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-03-17 14:40:06,333 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:06,334 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 38 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:40:06,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-17 14:40:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-03-17 14:40:06,337 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) [2022-03-17 14:40:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-17 14:40:06,338 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2022-03-17 14:40:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:06,338 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-17 14:40:06,338 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) [2022-03-17 14:40:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-17 14:40:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 14:40:06,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:06,339 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:06,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:06,543 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 [2022-03-17 14:40:06,544 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1453502491, now seen corresponding path program 1 times [2022-03-17 14:40:06,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:06,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590343876] [2022-03-17 14:40:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:06,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:06,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 14:40:06,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:06,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590343876] [2022-03-17 14:40:06,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590343876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:06,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471285619] [2022-03-17 14:40:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:06,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:06,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:06,629 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) [2022-03-17 14:40:06,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:40:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:06,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 14:40:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 14:40:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-17 14:40:06,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471285619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:06,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:06,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-17 14:40:06,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455535724] [2022-03-17 14:40:06,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:06,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 14:40:06,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 14:40:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-17 14:40:06,933 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) [2022-03-17 14:40:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:07,415 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-03-17 14:40:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 14:40:07,416 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 [2022-03-17 14:40:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:07,417 INFO L225 Difference]: With dead ends: 64 [2022-03-17 14:40:07,417 INFO L226 Difference]: Without dead ends: 64 [2022-03-17 14:40:07,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-03-17 14:40:07,418 INFO L912 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 [2022-03-17 14:40:07,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 32 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:40:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-17 14:40:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-03-17 14:40:07,422 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) [2022-03-17 14:40:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-03-17 14:40:07,422 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 35 [2022-03-17 14:40:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:07,423 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-03-17 14:40:07,423 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) [2022-03-17 14:40:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-03-17 14:40:07,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-17 14:40:07,424 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:07,424 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:07,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 14:40:07,635 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 [2022-03-17 14:40:07,635 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:07,636 INFO L85 PathProgramCache]: Analyzing trace with hash -444702843, now seen corresponding path program 2 times [2022-03-17 14:40:07,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:07,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400936794] [2022-03-17 14:40:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:07,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:07,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:07,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 14:40:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:07,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400936794] [2022-03-17 14:40:07,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400936794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586476618] [2022-03-17 14:40:07,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:40:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:07,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:07,776 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) [2022-03-17 14:40:07,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 14:40:07,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:40:07,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 14:40:07,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 14:40:08,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 14:40:08,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586476618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:08,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:08,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 21 [2022-03-17 14:40:08,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571405965] [2022-03-17 14:40:08,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:08,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 14:40:08,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:08,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 14:40:08,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-17 14:40:08,313 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) [2022-03-17 14:40:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:08,776 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-03-17 14:40:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 14:40:08,777 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 [2022-03-17 14:40:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:08,779 INFO L225 Difference]: With dead ends: 69 [2022-03-17 14:40:08,779 INFO L226 Difference]: Without dead ends: 69 [2022-03-17 14:40:08,780 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 14:40:08,780 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:08,781 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 29 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 14:40:08,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-17 14:40:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-03-17 14:40:08,784 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) [2022-03-17 14:40:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-03-17 14:40:08,785 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 54 [2022-03-17 14:40:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:08,785 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-03-17 14:40:08,785 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) [2022-03-17 14:40:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-03-17 14:40:08,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 14:40:08,786 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:08,786 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:08,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:08,991 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 [2022-03-17 14:40:08,991 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:08,992 INFO L85 PathProgramCache]: Analyzing trace with hash -292182650, now seen corresponding path program 3 times [2022-03-17 14:40:08,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:08,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806611289] [2022-03-17 14:40:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:09,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:09,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-17 14:40:09,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:09,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806611289] [2022-03-17 14:40:09,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806611289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:09,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294694936] [2022-03-17 14:40:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 14:40:09,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:09,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:09,086 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) [2022-03-17 14:40:09,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 14:40:09,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-17 14:40:09,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:09,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 14:40:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-17 14:40:09,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-03-17 14:40:09,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294694936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:09,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:09,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-03-17 14:40:09,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208906855] [2022-03-17 14:40:09,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:09,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 14:40:09,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:09,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 14:40:09,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-17 14:40:09,609 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) [2022-03-17 14:40:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:09,889 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-03-17 14:40:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 14:40:09,889 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 [2022-03-17 14:40:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:09,890 INFO L225 Difference]: With dead ends: 80 [2022-03-17 14:40:09,890 INFO L226 Difference]: Without dead ends: 80 [2022-03-17 14:40:09,891 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2022-03-17 14:40:09,891 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:09,892 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 30 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 14:40:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-17 14:40:09,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-17 14:40:09,895 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) [2022-03-17 14:40:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-03-17 14:40:09,896 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 57 [2022-03-17 14:40:09,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:09,896 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-03-17 14:40:09,897 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) [2022-03-17 14:40:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-03-17 14:40:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-17 14:40:09,898 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:09,898 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:09,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:10,115 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 [2022-03-17 14:40:10,115 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -582619515, now seen corresponding path program 4 times [2022-03-17 14:40:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132045719] [2022-03-17 14:40:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:10,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-17 14:40:10,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132045719] [2022-03-17 14:40:10,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132045719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396201850] [2022-03-17 14:40:10,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 14:40:10,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:10,222 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) [2022-03-17 14:40:10,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 14:40:10,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 14:40:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 14:40:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 14:40:10,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 14:40:10,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396201850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:10,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-03-17 14:40:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546828337] [2022-03-17 14:40:10,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:10,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 14:40:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 14:40:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-17 14:40:10,662 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) [2022-03-17 14:40:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:12,084 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-03-17 14:40:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-17 14:40:12,085 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 [2022-03-17 14:40:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:12,086 INFO L225 Difference]: With dead ends: 175 [2022-03-17 14:40:12,086 INFO L226 Difference]: Without dead ends: 175 [2022-03-17 14:40:12,088 INFO L911 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 [2022-03-17 14:40:12,088 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:12,088 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 39 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 14:40:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-17 14:40:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2022-03-17 14:40:12,094 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) [2022-03-17 14:40:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2022-03-17 14:40:12,095 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 69 [2022-03-17 14:40:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:12,095 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2022-03-17 14:40:12,095 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) [2022-03-17 14:40:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2022-03-17 14:40:12,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-17 14:40:12,096 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:12,097 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:12,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:12,311 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 [2022-03-17 14:40:12,312 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -551286544, now seen corresponding path program 5 times [2022-03-17 14:40:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469066957] [2022-03-17 14:40:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:12,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-17 14:40:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469066957] [2022-03-17 14:40:12,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469066957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637701494] [2022-03-17 14:40:12,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 14:40:12,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:12,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:12,760 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) [2022-03-17 14:40:12,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 14:40:12,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-17 14:40:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:12,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 14:40:12,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:12,975 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 14:40:12,975 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 [2022-03-17 14:40:13,132 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 [2022-03-17 14:40:13,714 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 [2022-03-17 14:40:13,781 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-17 14:40:13,781 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 [2022-03-17 14:40:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-17 14:40:13,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:14,015 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 [2022-03-17 14:40:14,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637701494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:14,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 14:40:14,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-03-17 14:40:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488378931] [2022-03-17 14:40:14,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:14,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-17 14:40:14,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-17 14:40:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=961, Unknown=9, NotChecked=62, Total=1122 [2022-03-17 14:40:14,018 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) [2022-03-17 14:40:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:14,945 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2022-03-17 14:40:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 14:40:14,945 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 [2022-03-17 14:40:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:14,946 INFO L225 Difference]: With dead ends: 124 [2022-03-17 14:40:14,946 INFO L226 Difference]: Without dead ends: 124 [2022-03-17 14:40:14,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2387, Unknown=14, NotChecked=100, Total=2756 [2022-03-17 14:40:14,948 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:14,948 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 722 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-03-17 14:40:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-17 14:40:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-03-17 14:40:14,953 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) [2022-03-17 14:40:14,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2022-03-17 14:40:14,954 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 78 [2022-03-17 14:40:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:14,954 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2022-03-17 14:40:14,954 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) [2022-03-17 14:40:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2022-03-17 14:40:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-17 14:40:14,955 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:14,955 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:14,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:15,175 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 [2022-03-17 14:40:15,176 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:15,176 INFO L85 PathProgramCache]: Analyzing trace with hash 215004892, now seen corresponding path program 1 times [2022-03-17 14:40:15,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:15,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577704317] [2022-03-17 14:40:15,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:15,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:15,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:15,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-17 14:40:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-17 14:40:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577704317] [2022-03-17 14:40:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577704317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303192915] [2022-03-17 14:40:15,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:15,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:15,808 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) [2022-03-17 14:40:15,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 14:40:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-17 14:40:15,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:15,959 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 14:40:15,959 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 [2022-03-17 14:40:16,096 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 [2022-03-17 14:40:16,174 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-17 14:40:16,174 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 [2022-03-17 14:40:16,623 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 [2022-03-17 14:40:18,844 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-17 14:40:18,844 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 [2022-03-17 14:40:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-17 14:40:18,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:19,083 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 [2022-03-17 14:40:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303192915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:19,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 14:40:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2022-03-17 14:40:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240558987] [2022-03-17 14:40:19,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:19,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 14:40:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 14:40:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1420, Unknown=12, NotChecked=76, Total=1640 [2022-03-17 14:40:19,086 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) [2022-03-17 14:40:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:20,355 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-17 14:40:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 14:40:20,355 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 [2022-03-17 14:40:20,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:20,356 INFO L225 Difference]: With dead ends: 135 [2022-03-17 14:40:20,356 INFO L226 Difference]: Without dead ends: 135 [2022-03-17 14:40:20,358 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=411, Invalid=3736, Unknown=17, NotChecked=126, Total=4290 [2022-03-17 14:40:20,358 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 141 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:20,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 201 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 641 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2022-03-17 14:40:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-17 14:40:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-17 14:40:20,370 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) [2022-03-17 14:40:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2022-03-17 14:40:20,374 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 86 [2022-03-17 14:40:20,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:20,374 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2022-03-17 14:40:20,375 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) [2022-03-17 14:40:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2022-03-17 14:40:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 14:40:20,378 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:20,378 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:20,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:20,579 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 [2022-03-17 14:40:20,579 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:20,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1130972984, now seen corresponding path program 2 times [2022-03-17 14:40:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:20,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890150994] [2022-03-17 14:40:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:21,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:21,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:21,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-17 14:40:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-17 14:40:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-03-17 14:40:21,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890150994] [2022-03-17 14:40:21,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890150994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169900859] [2022-03-17 14:40:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:40:21,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:21,196 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) [2022-03-17 14:40:21,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 14:40:21,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:40:21,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-17 14:40:21,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:21,349 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-17 14:40:21,349 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 [2022-03-17 14:40:21,440 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 [2022-03-17 14:40:21,518 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-17 14:40:21,519 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 [2022-03-17 14:40:21,565 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-17 14:40:21,566 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 [2022-03-17 14:40:22,027 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 [2022-03-17 14:40:22,376 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-17 14:40:22,377 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 [2022-03-17 14:40:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-03-17 14:40:22,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:22,657 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 [2022-03-17 14:40:22,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169900859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:22,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 14:40:22,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-03-17 14:40:22,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548790955] [2022-03-17 14:40:22,658 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:22,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-17 14:40:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:22,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-17 14:40:22,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1648, Unknown=11, NotChecked=82, Total=1892 [2022-03-17 14:40:22,660 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) [2022-03-17 14:40:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:23,810 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2022-03-17 14:40:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-17 14:40:23,811 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 [2022-03-17 14:40:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:23,812 INFO L225 Difference]: With dead ends: 140 [2022-03-17 14:40:23,812 INFO L226 Difference]: Without dead ends: 140 [2022-03-17 14:40:23,813 INFO L911 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 [2022-03-17 14:40:23,813 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:23,814 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 256 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 847 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2022-03-17 14:40:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-17 14:40:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-03-17 14:40:23,816 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) [2022-03-17 14:40:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-17 14:40:23,817 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 94 [2022-03-17 14:40:23,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:23,817 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-17 14:40:23,818 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) [2022-03-17 14:40:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-17 14:40:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-17 14:40:23,818 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:23,819 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:23,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-17 14:40:24,023 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 [2022-03-17 14:40:24,023 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 971116212, now seen corresponding path program 3 times [2022-03-17 14:40:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930574923] [2022-03-17 14:40:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:24,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:24,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:24,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-17 14:40:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:24,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-17 14:40:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:24,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-17 14:40:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-17 14:40:24,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:24,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930574923] [2022-03-17 14:40:24,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930574923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:24,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342719233] [2022-03-17 14:40:24,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 14:40:24,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:24,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:24,672 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) [2022-03-17 14:40:24,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 14:40:24,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-17 14:40:24,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-17 14:40:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:25,011 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-03-17 14:40:25,011 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 [2022-03-17 14:40:25,091 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 [2022-03-17 14:40:25,175 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-03-17 14:40:25,175 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 [2022-03-17 14:40:25,226 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-17 14:40:25,226 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 [2022-03-17 14:40:25,352 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-03-17 14:40:25,352 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 [2022-03-17 14:40:25,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-17 14:40:25,840 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 [2022-03-17 14:40:26,510 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-03-17 14:40:26,511 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 [2022-03-17 14:40:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-03-17 14:40:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:26,839 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 [2022-03-17 14:40:26,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342719233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:26,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 14:40:26,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-03-17 14:40:26,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486008126] [2022-03-17 14:40:26,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:26,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-17 14:40:26,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:26,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-17 14:40:26,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1884, Unknown=12, NotChecked=88, Total=2162 [2022-03-17 14:40:26,842 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) [2022-03-17 14:40:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:40:28,490 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2022-03-17 14:40:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 14:40:28,491 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 [2022-03-17 14:40:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:40:28,492 INFO L225 Difference]: With dead ends: 149 [2022-03-17 14:40:28,492 INFO L226 Difference]: Without dead ends: 149 [2022-03-17 14:40:28,493 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 112 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=519, Invalid=4724, Unknown=17, NotChecked=142, Total=5402 [2022-03-17 14:40:28,494 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 14:40:28,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 233 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 793 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-03-17 14:40:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-17 14:40:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-03-17 14:40:28,497 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) [2022-03-17 14:40:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2022-03-17 14:40:28,498 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 102 [2022-03-17 14:40:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:40:28,498 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2022-03-17 14:40:28,498 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) [2022-03-17 14:40:28,498 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2022-03-17 14:40:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-17 14:40:28,499 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:40:28,499 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:40:28,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 14:40:28,707 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 [2022-03-17 14:40:28,707 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:40:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:40:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1541490528, now seen corresponding path program 4 times [2022-03-17 14:40:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:40:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725678506] [2022-03-17 14:40:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:40:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:40:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:40:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:40:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-17 14:40:29,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-17 14:40:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-17 14:40:29,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-17 14:40:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:40:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-03-17 14:40:29,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:40:29,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725678506] [2022-03-17 14:40:29,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725678506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:40:29,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110619599] [2022-03-17 14:40:29,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 14:40:29,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:40:29,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:40:29,460 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) [2022-03-17 14:40:29,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 14:40:29,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 14:40:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:40:29,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-17 14:40:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:40:29,595 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 [2022-03-17 14:40:29,647 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-17 14:40:29,651 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 [2022-03-17 14:40:29,688 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-17 14:40:29,689 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 [2022-03-17 14:40:29,725 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-17 14:40:29,725 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 [2022-03-17 14:40:29,767 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-03-17 14:40:29,767 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 [2022-03-17 14:40:31,812 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-03-17 14:40:31,812 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 [2022-03-17 14:40:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 271 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 14:40:31,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:40:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 13 proven. 154 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-17 14:40:36,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110619599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:40:36,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:40:36,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 21] total 65 [2022-03-17 14:40:36,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540113156] [2022-03-17 14:40:36,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:40:36,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-17 14:40:36,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:40:36,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-17 14:40:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3708, Unknown=2, NotChecked=0, Total=4160 [2022-03-17 14:40:36,465 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) [2022-03-17 14:40:55,143 WARN L232 SmtUtils]: Spent 15.70s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 14:41:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:02,717 INFO L93 Difference]: Finished difference Result 483 states and 635 transitions. [2022-03-17 14:41:02,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-17 14:41:02,718 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 [2022-03-17 14:41:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:02,721 INFO L225 Difference]: With dead ends: 483 [2022-03-17 14:41:02,721 INFO L226 Difference]: Without dead ends: 483 [2022-03-17 14:41:02,724 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4598 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=1306, Invalid=11120, Unknown=6, NotChecked=0, Total=12432 [2022-03-17 14:41:02,727 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 214 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:02,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 187 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1742 Invalid, 0 Unknown, 1208 Unchecked, 0.8s Time] [2022-03-17 14:41:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-17 14:41:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 154. [2022-03-17 14:41:02,734 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) [2022-03-17 14:41:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-03-17 14:41:02,735 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 110 [2022-03-17 14:41:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:02,735 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-03-17 14:41:02,736 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) [2022-03-17 14:41:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-03-17 14:41:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-17 14:41:02,737 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:41:02,737 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:41:02,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 14:41:02,960 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 [2022-03-17 14:41:02,960 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:41:02,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:41:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash -289884532, now seen corresponding path program 5 times [2022-03-17 14:41:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:41:02,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904964119] [2022-03-17 14:41:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:41:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:41:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:41:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 14:41:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-17 14:41:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-17 14:41:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-17 14:41:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-17 14:41:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-17 14:41:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:41:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-17 14:41:03,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:41:03,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904964119] [2022-03-17 14:41:03,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904964119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:41:03,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142075610] [2022-03-17 14:41:03,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 14:41:03,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:41:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:41:03,104 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) [2022-03-17 14:41:03,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 14:41:03,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-17 14:41:03,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:41:03,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 14:41:03,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:41:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-03-17 14:41:03,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 14:41:03,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142075610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:41:03,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 14:41:03,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-03-17 14:41:03,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662284613] [2022-03-17 14:41:03,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:41:03,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 14:41:03,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:41:03,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 14:41:03,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 14:41:03,543 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) [2022-03-17 14:41:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:41:03,578 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2022-03-17 14:41:03,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 14:41:03,578 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 [2022-03-17 14:41:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:41:03,578 INFO L225 Difference]: With dead ends: 147 [2022-03-17 14:41:03,578 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 14:41:03,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-17 14:41:03,579 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 14:41:03,579 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 14:41:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 14:41:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 14:41:03,580 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) [2022-03-17 14:41:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 14:41:03,580 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-03-17 14:41:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:41:03,580 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 14:41:03,580 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) [2022-03-17 14:41:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 14:41:03,581 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 14:41:03,583 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 14:41:03,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 14:41:03,799 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 [2022-03-17 14:41:03,801 INFO L718 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1, 1] [2022-03-17 14:41:03,802 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 14:41:03,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:41:03 BasicIcfg [2022-03-17 14:41:03,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 14:41:03,805 INFO L158 Benchmark]: Toolchain (without parser) took 60701.04ms. Allocated memory was 211.8MB in the beginning and 329.3MB in the end (delta: 117.4MB). Free memory was 163.7MB in the beginning and 273.0MB in the end (delta: -109.3MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-03-17 14:41:03,805 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory was 180.2MB in the beginning and 180.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 14:41:03,806 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.78ms. Allocated memory is still 211.8MB. Free memory was 163.5MB in the beginning and 188.1MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 14:41:03,806 INFO L158 Benchmark]: Boogie Preprocessor took 28.55ms. Allocated memory is still 211.8MB. Free memory was 188.1MB in the beginning and 186.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 14:41:03,806 INFO L158 Benchmark]: RCFGBuilder took 296.19ms. Allocated memory is still 211.8MB. Free memory was 186.4MB in the beginning and 175.1MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 14:41:03,806 INFO L158 Benchmark]: IcfgTransformer took 25.83ms. Allocated memory is still 211.8MB. Free memory was 175.1MB in the beginning and 173.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 14:41:03,806 INFO L158 Benchmark]: TraceAbstraction took 60058.58ms. Allocated memory was 211.8MB in the beginning and 329.3MB in the end (delta: 117.4MB). Free memory was 173.4MB in the beginning and 273.0MB in the end (delta: -99.6MB). Peak memory consumption was 18.5MB. Max. memory is 8.0GB. [2022-03-17 14:41:03,811 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 211.8MB. Free memory was 180.2MB in the beginning and 180.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 286.78ms. Allocated memory is still 211.8MB. Free memory was 163.5MB in the beginning and 188.1MB in the end (delta: -24.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.55ms. Allocated memory is still 211.8MB. Free memory was 188.1MB in the beginning and 186.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 296.19ms. Allocated memory is still 211.8MB. Free memory was 186.4MB in the beginning and 175.1MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 25.83ms. Allocated memory is still 211.8MB. Free memory was 175.1MB in the beginning and 173.8MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 60058.58ms. Allocated memory was 211.8MB in the beginning and 329.3MB in the end (delta: 117.4MB). Free memory was 173.4MB in the beginning and 273.0MB in the end (delta: -99.6MB). Peak memory consumption was 18.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 60.0s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 35.1s, 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, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1834 GetRequests, 1190 SyntacticMatches, 68 SemanticMatches, 576 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 10003 ImplicationChecksByTransitivity, 42.7s 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, 1.1s 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! [2022-03-17 14:41:03,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...